TY - JOUR T1 - Evidence for liquid-liquid separation at the onset of CaCo (sub 3) mineralization; implications for carbonate deposition in natural environments AN - 1549619269; 2014-059599 AB - Compositional signatures within authigenic and biogenic carbonate phases are often used as indicators of past environmental conditions. Such efforts are underpinned by assumptions about the microscopic details of mineral formation. In the classical sense, carbonate minerals are presumed to nucleate directly from solution by overcoming a size-dependent free energy barrier that scales as the ratio of the macroscopic mineral-water interfacial tension cubed to the square of the thermodynamic supersaturation. However, experimental observations of the early stages of carbonate mineralization demonstrate that under certain conditions the formation of crystalline carbonates is preceded by the apparently spontaneous appearance of nanoscopic clusters that aggregate to produce metastable amorphous phases. Further, there is evidence to suggest that the level of magnesium incorporation into calcite formed via such intermediates may also be enhanced. Therefore, development of environmental proxies based on non-empirical relationships requires an understanding of the molecular level processes driving carbonate mineralization and how they vary in response to local environmental parameters. This research (Wallace et al., in press, Science) uses molecular dynamics techniques to probe the initial formation of hydrated calcium carbonate cluster species and lattice gas simulations to explore the general behavior of clusters at the onset of mineralization. The results suggest the growth of carbonate clusters may indeed proceed in the absence of any significant thermodynamic barrier. Moreover, the dynamical properties of the clusters are consistent with that of a dense liquid phase. Coalescence and dehydration of the nanoscale droplets results in the formation of a phase whose structure is consistent with that of amorphous calcium carbonate. These findings indicate that a spontaneous liquid-liquid phase separation may occur within the range of supersaturations spanned by natural waters. JF - Abstracts with Programs - Geological Society of America AU - Wallace, Adam F AU - Hedges, Lester AU - Fernandez-Martinez, Alejandro AU - Raiteri, Paolo AU - Gale, Julian AU - Waychunas, Glenn A AU - Whitelam, Steve AU - Banfield, Jillian AU - DeYoreo, James J AU - Anonymous Y1 - 2013 PY - 2013 DA - 2013 SP - 673 PB - Geological Society of America (GSA), Boulder, CO VL - 45 IS - 7 SN - 0016-7592, 0016-7592 KW - 01C:Mineralogy of non-silicates UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1549619269?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=Evidence+for+liquid-liquid+separation+at+the+onset+of+CaCo+%28sub+3%29+mineralization%3B+implications+for+carbonate+deposition+in+natural+environments&rft.au=Wallace%2C+Adam+F%3BHedges%2C+Lester%3BFernandez-Martinez%2C+Alejandro%3BRaiteri%2C+Paolo%3BGale%2C+Julian%3BWaychunas%2C+Glenn+A%3BWhitelam%2C+Steve%3BBanfield%2C+Jillian%3BDeYoreo%2C+James+J%3BAnonymous&rft.aulast=Wallace&rft.aufirst=Adam&rft.date=2013-01-01&rft.volume=45&rft.issue=7&rft.spage=673&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ L2 - https://gsa.confex.com/gsa/2013AM/webprogram/Paper231760.html LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2013 annual meeting & exposition N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2014-01-01 N1 - PubXState - CO N1 - Last updated - 2014-07-31 N1 - CODEN - GAAPBC ER - TY - JOUR T1 - Role of extracellular polysaccharides in regulating calcite nucleation kinetics and insights to the biogeochemistry of microbialites AN - 1549618286; 2014-059597 AB - Microbial carbonate deposits are formed by complex assemblages of proteins and polysaccharides within extracellular polymeric substances (EPS) whose roles in mineralization are not well understood. The acidic or negatively charged functional groups of these organic molecules are often attributed to promoting calcium carbonate precipitation, however, little is known about the mineralization mechanism. Here we quantify the kinetics of calcite nucleation onto a suite of high purity polysaccharide (PS) substrates under controlled conditions. The energy barriers to nucleation are PS-specific by a systematic relationship to PS charge density and substrate structure that is rooted in minimization of the competing substrate-crystal and substrate-liquid interfacial energies. Chitosan presents a low energy barrier to nucleation because its near-neutral charge favors formation of a substrate-crystal interface, thus reducing substrate interactions with water. Progressively higher barriers are measured for negatively charged alginates and heparin that favor contact with the solution over the formation of new substrate-crystal interfaces. The results support a directing role for PS in microbialite formation and demonstrate that substrate-crystal interactions are one end-member in a larger continuum of competing forces that regulate calcite precipitation in sedimentary environments. The finding that PS charge and structure significantly control nucleation rates suggests EPS chemistry may contribute to the variety of textures and fabrics seen in microbialites and other lacustrine carbonate deposits. JF - Abstracts with Programs - Geological Society of America AU - Giuffre, Anthony J AU - Hamm, Laura M AU - Han, Nizhou AU - De Yoreo, James J AU - Dove, Patricia M AU - Anonymous Y1 - 2013 PY - 2013 DA - 2013 SP - 673 PB - Geological Society of America (GSA), Boulder, CO VL - 45 IS - 7 SN - 0016-7592, 0016-7592 KW - 12:Stratigraphy UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1549618286?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=Role+of+extracellular+polysaccharides+in+regulating+calcite+nucleation+kinetics+and+insights+to+the+biogeochemistry+of+microbialites&rft.au=Giuffre%2C+Anthony+J%3BHamm%2C+Laura+M%3BHan%2C+Nizhou%3BDe+Yoreo%2C+James+J%3BDove%2C+Patricia+M%3BAnonymous&rft.aulast=Giuffre&rft.aufirst=Anthony&rft.date=2013-01-01&rft.volume=45&rft.issue=7&rft.spage=673&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ L2 - https://gsa.confex.com/gsa/2013AM/webprogram/Paper231078.html LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2013 annual meeting & exposition N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2014-01-01 N1 - PubXState - CO N1 - Last updated - 2014-07-31 N1 - CODEN - GAAPBC ER - TY - JOUR T1 - Advanced simulation capability for environmental management user release and current plans AN - 1549617934; 2014-057711 AB - The U.S. Department of Energy (USDOE) Office of Environmental Management (EM), Office of Soil and Groundwater Remediation, is supporting development of the Advanced Simulation Capability for Environmental Management (ASCEM). ASCEM is an open source and modular computing framework that incorporates new advances and tools for predicting contaminant fate and transport in natural and engineered systems. ASCEM is designed to integrate modeling tools under one framework. It is designed to facilitate integrated approaches to modeling and site characterization, and provide robust and standardized assessments of performance and risk for EM cleanup and closure activities. It is linked with applied field research sites funded by EM. The ASCEM project has continued development of capabilities, with emphasis on both the Platform and Integrated Toolsets and High-Performance Computing (HPC) multiprocess simulator. The Platform capabilities provide the user interface and tools for end-to-end model development, starting with definition of the conceptual model, management of data for model input, sensitivity analysis, model calibration and uncertainty analysis, and processing of model output, including visualization. The HPC capabilities target increased functionality of process representations, toolsets for interaction with Platform, and verification and model confidence building. In the fall of 2013, ASCEM will publicly release the basic R&D version of the code. The "User Release" will consists of a description of the software capabilities, a downloadable version of the toolsets with accompanying input files, and tutorials based on select test cases. Outreach efforts consisting of direct user interactions will completed along with a series of workshops in 2014. Continued enhancement of the ASCEM family of codes will also occur in 2014. Development efforts will include enhancing geochemistry and reactive transport capabilities for the HPC simulator and adding both risk and decision support to the Platform. This presentation will describe specifics of the release as well as the test cases and initial feedback. JF - Abstracts with Programs - Geological Society of America AU - Dixon, Paul AU - Freshley, Mark AU - Scheibe, Timothy D AU - Moulton, J David AU - Hubbard, Susan AU - Finsterle, Stefan AU - Steefel, Carl AU - Seitz, Roger AU - Marble, Justin AU - Anonymous Y1 - 2013 PY - 2013 DA - 2013 SP - 738 PB - Geological Society of America (GSA), Boulder, CO VL - 45 IS - 7 SN - 0016-7592, 0016-7592 KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1549617934?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=Advanced+simulation+capability+for+environmental+management+user+release+and+current+plans&rft.au=Dixon%2C+Paul%3BFreshley%2C+Mark%3BScheibe%2C+Timothy+D%3BMoulton%2C+J+David%3BHubbard%2C+Susan%3BFinsterle%2C+Stefan%3BSteefel%2C+Carl%3BSeitz%2C+Roger%3BMarble%2C+Justin%3BAnonymous&rft.aulast=Dixon&rft.aufirst=Paul&rft.date=2013-01-01&rft.volume=45&rft.issue=7&rft.spage=738&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ L2 - https://gsa.confex.com/gsa/2013AM/webprogram/Paper231787.html LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2013 annual meeting & exposition N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2014-01-01 N1 - PubXState - CO N1 - Last updated - 2014-07-31 N1 - CODEN - GAAPBC ER - TY - JOUR T1 - Index-based logistic modeling to predict soil carbon sequestration potential of pyrogenic carbons AN - 1545410039; 2014-052838 AB - We present an entirely new model for predicting the biodegradability, and subsequently the carbon sequestration potential, of pyrogenic organic carbon (pyC) materials in fire-impacted/biochar-amended soils. The model uses the relative stability of the pyC material (R (sub 50) ; to that of graphite), a heterogeneity constant (alpha ; based on the chemistry of the feedstock) and, an index-based kinetic function (beta ; the environmental driver) to estimate the percentage of pyC remaining after a given time, t (in years). Time, t can be on the decadal, the centurial and millennial time scales. The model was tested with published data from two independent (a 1-year and a 5-year) biochar biodegradation studies and was found to have prediction errors of <10% from the measured pyC-remaining. In addition to the pyC remaining the model facilitates the 1) simple calculation of mean residence time for the pyC material, 2) reconstruction/construction of degradation curves for materials of different stabilities and, 3) development of refined classification scheme to quantitatively rank (and assign monetary value to) the carbon sequestration potential of different pyC materials. The advantages and limitations of the model will be discussed. JF - Abstracts with Programs - Geological Society of America AU - Harvey, Omar Richard AU - Kuo, Li-Jung AU - Anonymous Y1 - 2013 PY - 2013 DA - 2013 SP - 157 PB - Geological Society of America (GSA), Boulder, CO VL - 45 IS - 7 SN - 0016-7592, 0016-7592 KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1545410039?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=Index-based+logistic+modeling+to+predict+soil+carbon+sequestration+potential+of+pyrogenic+carbons&rft.au=Harvey%2C+Omar+Richard%3BKuo%2C+Li-Jung%3BAnonymous&rft.aulast=Harvey&rft.aufirst=Omar&rft.date=2013-01-01&rft.volume=45&rft.issue=7&rft.spage=157&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ L2 - https://gsa.confex.com/gsa/2013AM/webprogram/Paper231668.html LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2013 annual meeting & exposition N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2014-01-01 N1 - PubXState - CO N1 - Last updated - 2014-07-17 N1 - CODEN - GAAPBC ER - TY - JOUR T1 - Nineteen-year hydrological performance of the prototype Hanford Barrier AN - 1542645563; 2014-050999 AB - The Prototype Hanford Barrier (PHB) is an engineered surface cover that consists of components designed to contain, control, and retard the water flow and the migration radioactive contaminants in the subsurface. The PHB was constructed in 1994 and is one of several long-term (with a design life of 1000 years) surface barriers over a waste site in a semi-arid region of the United States. The 80-m by 40-m barrier portion of the PHB consists of a 2-m-thick layer of silt loam resting on a capillary break of coarser materials ranging in sequence from sand to gravel to basalt riprap. The vegetation cover consists of assorted shrubs and annuals typical of the surrounding shrub-steppe environment. From 1995 to 1997, the northern half of the barrier was irrigated so the total amount of water falling on it was three times the average precipitation, while the southern half was exposed under a natural precipitation condition. In 2008, the vegetation on the northern half of the PHB was burned by a controlled fire to investigate the potential impacts of a wild fire on barrier performance. The soil water content within and beneath the 2-m-thick silt loam was monitored with vertical or horizontal neutron logging. The drainage through the barrier and sideslopes were monitored with 12 drainage vaults. The monitoring results and findings since 1994 will be presented and discussed. JF - Abstracts with Programs - Geological Society of America AU - Zhang, Zhuanfang F AU - Anonymous Y1 - 2013 PY - 2013 DA - 2013 SP - 488 PB - Geological Society of America (GSA), Boulder, CO VL - 45 IS - 7 SN - 0016-7592, 0016-7592 KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1542645563?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=Nineteen-year+hydrological+performance+of+the+prototype+Hanford+Barrier&rft.au=Zhang%2C+Zhuanfang+F%3BAnonymous&rft.aulast=Zhang&rft.aufirst=Zhuanfang&rft.date=2013-01-01&rft.volume=45&rft.issue=7&rft.spage=488&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ L2 - https://gsa.confex.com/gsa/2013AM/webprogram/Paper224272.html LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2013 annual meeting & exposition N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2014-01-01 N1 - PubXState - CO N1 - Last updated - 2014-07-04 N1 - CODEN - GAAPBC ER - TY - JOUR T1 - Deep vadose zone remediation; technical and policy challenges, opportunities, and progress in achieving cleanup endpoints AN - 1542645215; 2014-050990 AB - Contamination in deep vadose zone environments (sediments below the zone of practicable excavation and removal, but above the water table) is a significant issue in many regions of the world. This definition assumes that such contamination is isolated from exposure and movement of contamination to the groundwater creates the potential for exposure and risk to human health and environmental receptors. Therefore, while deep vadose zone environments are not necessarily considered a resource requiring restoration, limiting contaminant mass flux from vadose zone environments to water resources is necessary. Herein lies the challenge: applying vadose zone remediation to reach an acceptable rate of contaminant mass flux. However, this construct affords the opportunity to view remediation strategies for the vadose zone as targeted to mitigate the source of contamination and reduce transport through the vadose zone to receptors, in contrast to meeting a specific concentration measured at some location within the vadose zone. As such, controlling the flux of contaminants to groundwater to meet groundwater remediation goals can conceptually be viewed as: 1) contaminant mass reduction, 2) stabilization of contaminants so that they move slower, or 3) manipulation to slow the movement of contaminated pore water. These flux-reduction-based approaches recognize that for the deep vadose zone full removal of contamination is likely technically and/or economically impractical. We will present a review of how hydrogeologic and biogeochemical processes (rather than focusing on individual technologies) operate in deep vadose zone environments and are being used to meet remedial objectives, the technical risks and challenges for consideration during evaluation of a proposed remedial action, and the benefits of integrating vadose zone remediation into endpoints for groundwater protection. Specific examples will be presented to highlight significant advancements in defining risk-informed end states that area protective of human health and the environment for technetium, plutonium, americium, uranium, and iodine. JF - Abstracts with Programs - Geological Society of America AU - Wellman, Dawn M AU - Anonymous Y1 - 2013 PY - 2013 DA - 2013 SP - 487 PB - Geological Society of America (GSA), Boulder, CO VL - 45 IS - 7 SN - 0016-7592, 0016-7592 KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1542645215?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=Deep+vadose+zone+remediation%3B+technical+and+policy+challenges%2C+opportunities%2C+and+progress+in+achieving+cleanup+endpoints&rft.au=Wellman%2C+Dawn+M%3BAnonymous&rft.aulast=Wellman&rft.aufirst=Dawn&rft.date=2013-01-01&rft.volume=45&rft.issue=7&rft.spage=487&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ L2 - https://gsa.confex.com/gsa/2013AM/webprogram/Paper226677.html LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2013 annual meeting & exposition N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2014-01-01 N1 - PubXState - CO N1 - Last updated - 2014-07-04 N1 - CODEN - GAAPBC ER - TY - JOUR T1 - Extending the conventional hydraulic functions to conditions from oven-dry to full saturation AN - 1542644606; 2014-048394 AB - Common conceptual models for unsaturated flow assume that the matric potential is attributed to the capillary force only. These models are successful at high and medium water contents but often give poor results at low water contents. The lower bound of existing water-retention functions and conductivity models was extended from residual water content to the oven-dry condition (i.e., zero water content) by defining a state-dependent residual-water content for a soil drier than a critical value. The advantages of the extended water-retention functions include not refitting the retention parameters for the un-extended model, its reduction to the un-extended form when the soil is wetter than the critical value, and its compatibility with existing relative permeability models. In addition, a hydraulic conductivity model for film flow in a medium of smooth uniform spheres was modified by introducing a correction factor to describe the film flow-induced hydraulic conductivity for natural porous media. The total unsaturated hydraulic conductivity is the sum of those due to capillary and film flow; it smoothly transits between capillary-dominated flow and film-dominated flow over the full range of water content. The film flow is insignificant when the soil is wetter than the critical water content and, vice versa, the capillary flow is insignificant when the soil is drier than the critical water content. The extended retention and conductivity models were tested with measurements. Results show that, when the soil is at high and intermediate water content, there is no difference between the un-extended and the extended models as defined by the theory; when the soil is at low water content, the un-extended models overestimate the water content but underestimate the conductivity. The mathematical models and tests with experiment data will be presented. JF - Abstracts with Programs - Geological Society of America AU - Zhang, Zhuanfang Fred AU - Anonymous Y1 - 2013 PY - 2013 DA - 2013 SP - 105 PB - Geological Society of America (GSA), Boulder, CO VL - 45 IS - 7 SN - 0016-7592, 0016-7592 KW - 02B:Hydrochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1542644606?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=Extending+the+conventional+hydraulic+functions+to+conditions+from+oven-dry+to+full+saturation&rft.au=Zhang%2C+Zhuanfang+Fred%3BAnonymous&rft.aulast=Zhang&rft.aufirst=Zhuanfang&rft.date=2013-01-01&rft.volume=45&rft.issue=7&rft.spage=105&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ L2 - https://gsa.confex.com/gsa/2013AM/webprogram/Paper233008.html LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2013 annual meeting & exposition N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2014-01-01 N1 - PubXState - CO N1 - Last updated - 2014-07-04 N1 - CODEN - GAAPBC ER - TY - JOUR T1 - A scaling model for scaling uranium sorption/desorption properties and their uncertainties in contaminated sediments AN - 1542644335; 2014-051138 AB - A statistical approach was developed based on sediment grain size distribution to scale U(VI) sorption/desorption properties in sediments. The approach assumes that the mean and variance of U(VI) sorption/desorption properties in a sediment including labile U(VI) concentration, sorption site concentration, equilibrium surface complexation reaction constants, and sorption/desorption rate constants can be predicted from the corresponding properties in individual grain size fractions in the sediment. The approach concept and numerical implementation was demonstrated using multi-rate U(VI) desorption from a contaminated sediment from US Department of Energy's Hanford site, Washington. Stirred flow-cell experiments were performed to derive U(VI) desorption data in the contaminated sediment and its individual grain size fractions. The flow-cell data were used to estimate the rate constants and their statistical properties for individual grain size fractions. The calibrated properties were then used to predict the rate constants and their statistical properties in the sediment, which were used to predict U(VI) desorption. The predicted U(VI) desorption was validated with the measured U(VI) desorption in the sediment. The developed approach can be used to upscale U(VI) sorption/desorption properties from laboratory to field using field-scale grain size distribution. The concept of the approach can also be applied to upscale other reaction properties. JF - Abstracts with Programs - Geological Society of America AU - Zhang, Xiaoying AU - Liu, Chongxuan AU - Hu, Bill AU - Hu, Q H AU - Anonymous Y1 - 2013 PY - 2013 DA - 2013 SP - 714 PB - Geological Society of America (GSA), Boulder, CO VL - 45 IS - 7 SN - 0016-7592, 0016-7592 KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1542644335?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=A+scaling+model+for+scaling+uranium+sorption%2Fdesorption+properties+and+their+uncertainties+in+contaminated+sediments&rft.au=Zhang%2C+Xiaoying%3BLiu%2C+Chongxuan%3BHu%2C+Bill%3BHu%2C+Q+H%3BAnonymous&rft.aulast=Murakami&rft.aufirst=Haruko&rft.date=2010-01-01&rft.volume=2010&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstract+-+Japan+Geoscience+Union+Meeting&rft.issn=&rft_id=info:doi/ L2 - https://gsa.confex.com/gsa/2013AM/webprogram/Paper228445.html LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2013 annual meeting & exposition N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2014-01-01 N1 - PubXState - CO N1 - Last updated - 2014-07-04 N1 - CODEN - GAAPBC ER - TY - JOUR T1 - Simulation of coupled surface-subsurface hydrologic and terrestrial ecosystem processes using PFLOTRAN and CLM AN - 1535206106; 2014-041259 AB - Current Earth system models greatly simplify or completely omit some key physical processes, such as lateral flow of water and heat, surface-subsurface interactions, realistic groundwater-vadose zone interactions, and freeze-thaw dynamics. Capturing the effects of such processes is critically important for improving our understanding of climate change impacts on hydrology and associated climate feedbacks. Towards this end, we have added non-isothermal coupled surface-water groundwater interactions and a multi-phase ice model to PFLOTRAN--an open-source, massively parallel hydrologic flow and reactive transport model--and have developed a framework for coupling it with the Community Land Model (CLM), the state-of-the-art LSM component of the Community Earth System Model (CESM). In the coupled CLM-PFLOTRAN model, PFLOTRAN replaces the CLM treatment of surface and subsurface thermal hydrology. CLM provides sources and sinks of water (evapotranspiration, snowmelt, and precipitation) and heat flux; while PFLOTRAN evolves the subsurface soil moisture and thermal states (including freeze-thaw dynamics). This allows a unified treatment of the unsaturated and saturated zones (which are decoupled in standalone CLM) and enables lateral redistribution of surface and subsurface water and heat. In addition to hydrologic coupling, we are developing a biogeochemistry linkage to enable interaction between CLM plant functional types and PFLOTRAN subsurface biogeochemistry. We will describe the development of our model and demonstrate its application at two very different locations: The permafrost-affected landscape of the Barrow Environmental Observatory research reserve on the North Slope of Alaska, and the Walker Branch Watershed on the U.S. Department of Energy's Oak Ridge Reservation, located in the humid subtropical environment of the Valley and Ridge Appalachians of East Tennessee. JF - Abstracts with Programs - Geological Society of America AU - Mills, Richard Tran AU - Bisht, Gautam AU - Kumar, Jitendra AU - Cheng, Chu-Lin AU - Tang, Guoping AU - Hammond, Glenn E AU - Andre, Benjamin J AU - Watson, David B AU - Brooks, Scott C AU - Anonymous Y1 - 2013 PY - 2013 DA - 2013 SP - 264 PB - Geological Society of America (GSA), Boulder, CO VL - 45 IS - 7 SN - 0016-7592, 0016-7592 KW - 21:Hydrogeology KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1535206106?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=Simulation+of+coupled+surface-subsurface+hydrologic+and+terrestrial+ecosystem+processes+using+PFLOTRAN+and+CLM&rft.au=Mills%2C+Richard+Tran%3BBisht%2C+Gautam%3BKumar%2C+Jitendra%3BCheng%2C+Chu-Lin%3BTang%2C+Guoping%3BHammond%2C+Glenn+E%3BAndre%2C+Benjamin+J%3BWatson%2C+David+B%3BBrooks%2C+Scott+C%3BAnonymous&rft.aulast=Mills&rft.aufirst=Richard&rft.date=2013-01-01&rft.volume=45&rft.issue=7&rft.spage=264&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ L2 - https://gsa.confex.com/gsa/2013AM/webprogram/Paper226286.html LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2013 annual meeting & exposition N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2014-01-01 N1 - PubXState - CO N1 - Last updated - 2014-06-13 N1 - CODEN - GAAPBC ER - TY - JOUR T1 - Measurements of calcite nucleation kinetics and binding energies reconcile disparate views of template-directed nucleation AN - 1535203893; 2014-038359 AB - The physical basis for how organisms use macromolecules to regulate the onset of mineral formation in calcifying tissues is not well established. The biomineralization community has widely assumed that the organic matrix promotes nucleation through stereochemical matching to guide the organization of solute ions, while materials synthesis groups use simple binding assays to correlate high binding strength with good promoters of nucleation. This study reconciles the two views and provides a mechanistic explanation for template-directed nucleation by correlating heterogeneous nucleation barriers with crystal-substrate binding free energies. Using surface assembled monolayers (SAM), we first measure the kinetics of calcite nucleation onto model substrates that present different functional group chemistries (carboxyl, thiol, phosphate, hydroxyl) and conformations (C11, C16 chain lengths). We find rates are substrate-specific and obey predictions of classical nucleation theory at supersaturations that extend above the solubility of amorphous calcium carbonate (ACC). Analysis of the kinetic data shows the thermodynamic barrier to nucleation is reduced by minimizing the interfacial free energy of the system, g. We then use dynamic force spectroscopy to independently measure calcite-substrate binding free energies, DG (sub b) . Moreover, we show that within the classical theory of nucleation, g and DG (sub b) should be linearly related. The results bear out this prediction and demonstrate that low energy barriers to nucleation correlate with strong crystal-substrate binding. This relationship is general to all functional group chemistries and conformations. These findings reconcile the long-standing concept of templated nucleation through stereochemical matching with the conventional wisdom that 'good binders are good nucleators'. The alternative perspectives become internally consistent when viewed through the lens of crystal-substrate binding and provide a physical basis for the compound-specific ability of organics to promote carbonate nucleation. JF - Abstracts with Programs - Geological Society of America AU - Dove, Patricia M AU - Hamm, Laura M AU - Giuffre, Anthony J AU - De Yoreo, James J AU - Anonymous Y1 - 2013 PY - 2013 DA - 2013 SP - 28 PB - Geological Society of America (GSA), Boulder, CO VL - 45 IS - 7 SN - 0016-7592, 0016-7592 KW - biomineralization KW - nucleation KW - free energy KW - calcium carbonate KW - kinetics KW - carbonates KW - calcite KW - 02A:General geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1535203893?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=Measurements+of+calcite+nucleation+kinetics+and+binding+energies+reconcile+disparate+views+of+template-directed+nucleation&rft.au=Dove%2C+Patricia+M%3BHamm%2C+Laura+M%3BGiuffre%2C+Anthony+J%3BDe+Yoreo%2C+James+J%3BAnonymous&rft.aulast=Dove&rft.aufirst=Patricia&rft.date=2013-01-01&rft.volume=45&rft.issue=7&rft.spage=28&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ L2 - https://gsa.confex.com/gsa/2013AM/webprogram/Paper230915.html LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2013 annual meeting & exposition N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2014-01-01 N1 - PubXState - CO N1 - Last updated - 2014-06-13 N1 - CODEN - GAAPBC N1 - SubjectsTermNotLitGenreText - biomineralization; calcite; calcium carbonate; carbonates; free energy; kinetics; nucleation ER - TY - JOUR T1 - From data to analysis: linking NWChem and Avogadro with the syntax and semantics of Chemical Markup Language AN - 1412519365; 18254789 AB - Background: Multidisciplinary integrated research requires the ability to couple the diverse sets of data obtained from a range of complex experiments and computer simulations. Integrating data requires semantically rich information. In this paper an end-to-end use of semantically rich data in computational chemistry is demonstrated utilizing the Chemical Markup Language (CML) framework. Semantically rich data is generated by the NWChem computational chemistry software with the FoX library and utilized by the Avogadro molecular editor for analysis and visualization. Results: The NWChem computational chemistry software has been modified and coupled to the FoX library to write CML compliant XML data files. The FoX library was expanded to represent the lexical input files and molecular orbitals used by the computational chemistry software. Draft dictionary entries and a format for molecular orbitals within CML CompChem were developed. The Avogadro application was extended to read in CML data, and display molecular geometry and electronic structure in the GUI allowing for an end-to-end solution where Avogadro can create input structures, generate input files, NWChem can run the calculation and Avogadro can then read in and analyse the CML output produced. The developments outlined in this paper will be made available in future releases of NWChem, FoX, and Avogadro. Conclusions: The production of CML compliant XML files for computational chemistry software such as NWChem can be accomplished relatively easily using the FoX library. The CML data can be read in by a newly developed reader in Avogadro and analysed or visualized in various ways. A community-based effort is needed to further develop the CML CompChem convention and dictionary. This will enable the long-term goal of allowing a researcher to run simple "Google-style" searches of chemistry and physics and have the results of computational calculations returned in a comprehensible form alongside articles from the published literature. JF - Journal of Cheminformatics AU - de Jong, Wibe A AU - Walker, Andrew M AU - Hanwell, Marcus D AD - EMSL, Pacific Northwest National Laboratory, P.O. Box 999, Richland, WA 99352, USA Y1 - 2013 PY - 2013 DA - 2013 SP - 25 PB - BioMed Central Ltd., Middlesex House London W1T 4LB United Kingdom VL - 5 IS - 1 SN - 1758-2946, 1758-2946 KW - Biotechnology and Bioengineering Abstracts KW - Computer programs KW - software KW - Data processing KW - Mathematical models KW - Informatics KW - Language KW - Computer applications KW - Semantics KW - W 30960:Bioinformatics & Computer Applications UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1412519365?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Abiotechresearch&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Cheminformatics&rft.atitle=From+data+to+analysis%3A+linking+NWChem+and+Avogadro+with+the+syntax+and+semantics+of+Chemical+Markup+Language&rft.au=de+Jong%2C+Wibe+A%3BWalker%2C+Andrew+M%3BHanwell%2C+Marcus+D&rft.aulast=de+Jong&rft.aufirst=Wibe&rft.date=2013-01-01&rft.volume=5&rft.issue=1&rft.spage=25&rft.isbn=&rft.btitle=&rft.title=Journal+of+Cheminformatics&rft.issn=17582946&rft_id=info:doi/10.1186%2F1758-2946-5-25 L2 - http://www.jcheminf.com/content/5/1/25 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-07-01 N1 - Number of references - 51 N1 - Last updated - 2013-08-12 N1 - SubjectsTermNotLitGenreText - Computer programs; software; Mathematical models; Data processing; Informatics; Language; Computer applications; Semantics DO - http://dx.doi.org/10.1186/1758-2946-5-25 ER - TY - JOUR T1 - Novel monosaccharide fermentation products in Caldicellulosiruptor saccharolyticus identified using NMR spectroscopy AN - 1352295639; 18002042 AB - Background: Caldicellulosiruptor saccharolyticus is a thermophilic, Gram-positive, non-spore forming, strictly anaerobic bacterium of interest in potential industrial applications, including the production of biofuels such as hydrogen or ethanol from lignocellulosic biomass through fermentation. High-resolution, solution-state nuclear magnetic resonance (NMR) spectroscopy is a useful method for the identification and quantification of metabolites that result from growth on different substrates. NMR allows facile resolution of isomeric (identical mass) constituents and does not destroy the sample. Results: Profiles of metabolites produced by the thermophilic cellulose-degrading bacterium Caldicellulosiruptor saccharolyticus DSM 8903 strain following growth on different monosaccharides (D-glucose, D-mannose, L-arabinose, D-arabinose, D-xylose, L-fucose, and D-fucose) as carbon sources revealed several unexpected fermentation products, suggesting novel metabolic capacities and unexplored metabolic pathways in this organism. Both super(1)H and super(13)C nuclear magnetic resonance (NMR) spectroscopy were used to determine intracellular and extracellular metabolite profiles. One dimensional super(1)H NMR spectral analysis was performed by curve fitting against spectral libraries provided in the Chenomx software; 2-D homonuclear and heteronuclear NMR experiments were conducted to further reduce uncertainties due to unassigned, overlapping, or poorly-resolved peaks. In addition to expected metabolites such as acetate, lactate, glycerol, and ethanol, several novel fermentation products were identified: ethylene glycol (from growth on D-arabinose), acetoin and 2,3-butanediol (from growth on D-glucose, L-arabinose, and D-xylose), and hydroxyacetone (from growth on D-mannose, L-arabinose, and D-xylose). Production of ethylene glycol from D-arabinose was particularly notable, with around 10% of the substrate carbon converted into this uncommon fermentation product. Conclusions: The present research shows that C. saccharolyticus, already of substantial interest due to its capability for biological ethanol and hydrogen production, has further metabolic potential for production of higher molecular weight compounds, such as acetoin and 2,3-butanediol, as well as hydroxyacetone and the uncommon fermentation product ethylene glycol. In addition, application of nuclear magnetic resonance (NMR) spectroscopy facilitates identification of novel metabolites, which is instrumental for production of desirable bioproducts from biomass through microbial fermentation. JF - Biotechnology for Biofuels AU - Isern, Nancy G AU - Xue, Junfeng AU - Rao, Jaya V AU - Cort, John R AU - Ahring, Birgitte K AD - Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, WA, 99354, USA Y1 - 2013 PY - 2013 DA - 2013 SP - 47 PB - BioMed Central Ltd., Floor 6 London WC1X 8HL United Kingdom VL - 6 IS - 1 SN - 1754-6834, 1754-6834 KW - Microbiology Abstracts A: Industrial & Applied Microbiology; Biotechnology and Bioengineering Abstracts KW - Caldicellulosiruptor saccharolyticus KW - Nuclear magnetic resonance KW - Bioproducts KW - Acetoin KW - 2,3-Butanediol KW - Ethylene glycol KW - L-Arabinose KW - Fermentation KW - Mannose KW - Glucose KW - Metabolites KW - monosaccharides KW - Hydrogen KW - Biomass KW - Acetic acid KW - Computer programs KW - software KW - Magnetic resonance spectroscopy KW - Lactic acid KW - Metabolic pathways KW - Caldicellulosiruptor KW - N.M.R. KW - Biofuels KW - Ethanol KW - W 30910:Imaging KW - A 01330:Food Microbiology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1352295639?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Abiotechresearch&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Biotechnology+for+Biofuels&rft.atitle=Novel+monosaccharide+fermentation+products+in+Caldicellulosiruptor+saccharolyticus+identified+using+NMR+spectroscopy&rft.au=Isern%2C+Nancy+G%3BXue%2C+Junfeng%3BRao%2C+Jaya+V%3BCort%2C+John+R%3BAhring%2C+Birgitte+K&rft.aulast=Isern&rft.aufirst=Nancy&rft.date=2013-01-01&rft.volume=6&rft.issue=1&rft.spage=47&rft.isbn=&rft.btitle=&rft.title=Biotechnology+for+Biofuels&rft.issn=17546834&rft_id=info:doi/10.1186%2F1754-6834-6-47 L2 - http://www.biotechnologyforbiofuels.com/content/6/1/47 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-05-01 N1 - Number of references - 25 N1 - Last updated - 2015-03-19 N1 - SubjectsTermNotLitGenreText - L-Arabinose; Acetoin; Fermentation; Mannose; Glucose; Metabolites; Hydrogen; monosaccharides; Biomass; Acetic acid; Computer programs; software; Magnetic resonance spectroscopy; Metabolic pathways; Lactic acid; N.M.R.; Ethylene glycol; Biofuels; Ethanol; Caldicellulosiruptor DO - http://dx.doi.org/10.1186/1754-6834-6-47 ER - TY - JOUR T1 - MultiAlign: a multiple LC-MS analysis tool for targeted omics analysis AN - 1323815786; 17787448 AB - Background: MultiAlign is a free software tool that aligns multiple liquid chromatography-mass spectrometry datasets to one another by clustering mass and chromatographic elution features across datasets. Applicable to both label-free proteomics and metabolomics comparative analyses, the software can be operated in several modes. For example, clustered features can be matched to a reference database to identify analytes, used to generate abundance profiles, linked to tandem mass spectra based on parent precursor masses, and culled for targeted liquid chromatography-tandem mass spectrometric analysis. MultiAlign is also capable of tandem mass spectral clustering to describe proteome structure and find similarity in subsequent sample runs. Results: MultiAlign was applied to two large proteomics datasets obtained from liquid chromatography-mass spectrometry analyses of environmental samples. Peptides in the datasets for a microbial community that had a known metagenome were identified by matching mass and elution time features to those in an established reference peptide database. Results compared favorably with those obtained using existing tools such as VIPER, but with the added benefit of being able to trace clusters of peptides across conditions to existing tandem mass spectra. MultiAlign was further applied to detect clusters across experimental samples derived from a reactor biomass community for which no metagenome was available. Several clusters were culled for further analysis to explore changes in the community structure. Lastly, MultiAlign was applied to liquid chromatography-mass spectrometry-based datasets obtained from a previously published study of wild type and mitochondrial fatty acid oxidation enzyme knockdown mutants of human hepatocarcinoma to demonstrate its utility for analyzing metabolomics datasets. Conclusion: MultiAlign is an efficient software package for finding similar analytes across multiple liquid chromatography-mass spectrometry feature maps, as demonstrated here for both proteomics and metabolomics experiments. The software is particularly useful for proteomic studies where little or no genomic context is known, such as with environmental proteomics. JF - BMC Bioinformatics AU - LaMarche, Brian L AU - Crowell, Kevin L AU - Jaitly, Navdeep AU - Petyuk, Vladislav A AU - Shah, Anuj R AU - Polpitiya, Ashoka D AU - Sandoval, John D AU - Kiebel, Gary R AU - Monroe, Matthew E AU - Callister, Stephen J AU - Metz, Thomas O AU - Anderson, Gordon A AU - Smith, Richard D AD - Pacific Northwest National Laboratory, 99352, Richland, WA, USA Y1 - 2013 PY - 2013 DA - 2013 SP - 49 PB - BioMed Central Ltd., Middlesex House London W1T 4LB United Kingdom VL - 14 IS - 1 SN - 1471-2105, 1471-2105 KW - Biotechnology and Bioengineering Abstracts KW - Metabolomics KW - Proteomics KW - Mass spectrometry KW - Liquid chromatography KW - Spectral clustering KW - Alignment KW - Abundance KW - Enzymes KW - Mitochondria KW - Biomass KW - Spectrometry KW - Databases KW - Computer programs KW - software KW - Community structure KW - Oxidation KW - Fatty acids KW - genomics KW - Bioinformatics KW - proteomics KW - metabolomics KW - Gene mapping KW - W 30960:Bioinformatics & Computer Applications UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1323815786?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Abiotechresearch&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=BMC+Bioinformatics&rft.atitle=MultiAlign%3A+a+multiple+LC-MS+analysis+tool+for+targeted+omics+analysis&rft.au=LaMarche%2C+Brian+L%3BCrowell%2C+Kevin+L%3BJaitly%2C+Navdeep%3BPetyuk%2C+Vladislav+A%3BShah%2C+Anuj+R%3BPolpitiya%2C+Ashoka+D%3BSandoval%2C+John+D%3BKiebel%2C+Gary+R%3BMonroe%2C+Matthew+E%3BCallister%2C+Stephen+J%3BMetz%2C+Thomas+O%3BAnderson%2C+Gordon+A%3BSmith%2C+Richard+D&rft.aulast=LaMarche&rft.aufirst=Brian&rft.date=2013-01-01&rft.volume=14&rft.issue=1&rft.spage=49&rft.isbn=&rft.btitle=&rft.title=BMC+Bioinformatics&rft.issn=14712105&rft_id=info:doi/10.1186%2F1471-2105-14-49 L2 - http://www.biomedcentral.com/1471-2105/14/49 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-04-01 N1 - Number of references - 23 N1 - Last updated - 2015-03-19 N1 - SubjectsTermNotLitGenreText - Abundance; Mitochondria; Enzymes; Biomass; Spectrometry; Computer programs; Databases; software; Community structure; Oxidation; Fatty acids; proteomics; Bioinformatics; genomics; metabolomics; Gene mapping DO - http://dx.doi.org/10.1186/1471-2105-14-49 ER - TY - JOUR T1 - ISA-TAB-Nano: A Specification for Sharing Nanomaterial Research Data in Spreadsheet-based Format AN - 1323248288; 17778677 AB - Background and motivation: The high-throughput genomics communities have been successfully using standardized spreadsheet-based formats to capture and share data within labs and among public repositories. The nanomedicine community has yet to adopt similar standards to share the diverse and multi-dimensional types of data (including metadata) pertaining to the description and characterization of nanomaterials. Owing to the lack of standardization in representing and sharing nanomaterial data, most of the data currently shared via publications and data resources are incomplete, poorly-integrated, and not suitable for meaningful interpretation and re-use of the data. Specifically, in its current state, data cannot be effectively utilized for the development of predictive models that will inform the rational design of nanomaterials. Results: We have developed a specification called ISA-TAB-Nano, which comprises four spreadsheet-based file formats for representing and integrating various types of nanomaterial data. Three file formats (Investigation, Study, and Assay files) have been adapted from the established ISA-TAB specification; while the Material file format was developed de novo to more readily describe the complexity of nanomaterials and associated small molecules. In this paper, we have discussed the main features of each file format and how to use them for sharing nanomaterial descriptions and assay metadata. Conclusion: The ISA-TAB-Nano file formats provide a general and flexible framework to record and integrate nanomaterial descriptions, assay data (metadata and endpoint measurements) and protocol information. Like ISA-TAB, ISA-TAB-Nano supports the use of ontology terms to promote standardized descriptions and to facilitate search and integration of the data. The ISA-TAB-Nano specification has been submitted as an ASTM work item to obtain community feedback and to provide a nanotechnology data-sharing standard for public development and adoption. JF - BMC Biotechnology AU - Thomas, Dennis G AU - Gaheen, Sharon AU - Harper, Stacey L AU - Fritts, Martin AU - Klaessig, Fred AU - Hahn-Dantona, Elizabeth AU - Paik, David AU - Pan, Sue AU - Stafford, Grace A AU - Freund, Elaine T AU - Klemm, Juli D AU - Baker, Nathan A AD - Knowledge Discovery and Informatics, Pacific Northwest National Laboratory, Richland, WA 99352, USA Y1 - 2013 PY - 2013 DA - 2013 SP - 2 PB - BioMed Central Ltd., Middlesex House London W1T 4LB United Kingdom VL - 13 IS - 1 SN - 1472-6750, 1472-6750 KW - Biotechnology and Bioengineering Abstracts KW - Integration KW - Standardization KW - Data processing KW - Motivation KW - Adoption KW - Feedback KW - genomics KW - nanotechnology KW - Models KW - W 30965:Miscellaneous, Reviews UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1323248288?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Abiotechresearch&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=BMC+Biotechnology&rft.atitle=ISA-TAB-Nano%3A+A+Specification+for+Sharing+Nanomaterial+Research+Data+in+Spreadsheet-based+Format&rft.au=Thomas%2C+Dennis+G%3BGaheen%2C+Sharon%3BHarper%2C+Stacey+L%3BFritts%2C+Martin%3BKlaessig%2C+Fred%3BHahn-Dantona%2C+Elizabeth%3BPaik%2C+David%3BPan%2C+Sue%3BStafford%2C+Grace+A%3BFreund%2C+Elaine+T%3BKlemm%2C+Juli+D%3BBaker%2C+Nathan+A&rft.aulast=Thomas&rft.aufirst=Dennis&rft.date=2013-01-01&rft.volume=13&rft.issue=1&rft.spage=2&rft.isbn=&rft.btitle=&rft.title=BMC+Biotechnology&rft.issn=14726750&rft_id=info:doi/10.1186%2F1472-6750-13-2 L2 - http://www.biomedcentral.com/1472-6750/13/2 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-04-01 N1 - Number of references - 31 N1 - Last updated - 2015-04-09 N1 - SubjectsTermNotLitGenreText - Standardization; Integration; Data processing; Motivation; Feedback; Adoption; genomics; Models; nanotechnology DO - http://dx.doi.org/10.1186/1472-6750-13-2 ER - TY - JOUR T1 - Single-pass flow-through test elucidation of weathering behavior and evaluation of contaminant release models for Hanford tank residual radioactive waste AN - 1312835587; 2013-021147 AB - Contaminant release models are required to evaluate and predict long-term environmental impacts of residual amounts of high-level radioactive waste after cleanup and closure of radioactively contaminated sites such as the DOE's Hanford Site. More realistic and representative models have been developed for release of U, Tc and Cr from Hanford Site tanks C-202, C-203, and C-103 residual wastes using data collected with a single-pass flow-through test (SPFT) method. These revised models indicate that contaminant release concentrations from these residual wastes will be considerably lower than previous estimates based on batch experiments. For U, a thermodynamic solubility model provides an effective description of U release, which can account for differences in pore fluid chemistry contacting the waste that could occur through time and as a result of different closure scenarios. Under certain circumstances in the SPFT experiments various Ca-rich precipitates (Ca phosphates and calcite) form on the surfaces of the waste particles, inhibiting dissolution of the underlying U phases in the waste. This behavior was not observed in previous batch experiments. For both Tc and Cr, empirical release models were developed. In the case of Tc, release from all three wastes was modeled using an equilibrium K (sub d) model. For Cr release, a constant concentration model was applied for all three wastes. Abstract Copyright (2013) Elsevier, B.V. JF - Applied Geochemistry AU - Cantrell, Kirk J AU - Carroll, Kenneth C AU - Buck, Edgar C AU - Neiner, Doinita AU - Geiszler, Keith N Y1 - 2013/01// PY - 2013 DA - January 2013 SP - 119 EP - 127 PB - Elsevier, Oxford-New York-Beijing VL - 28 SN - 0883-2927, 0883-2927 KW - United States KW - hazardous waste KW - X-ray diffraction data KW - isotopes KW - mass spectra KW - environmental analysis KW - radioactive waste KW - radioactive isotopes KW - water-rock interaction KW - spectra KW - thermodynamic properties KW - water pollution KW - chromium KW - technetium KW - Washington KW - pollutants KW - pollution KW - Hanford Site KW - phosphates KW - solubility KW - weathering KW - calcite KW - models KW - ICP mass spectra KW - ion chromatograms KW - soil pollution KW - precipitation KW - metals KW - chromatograms KW - uranium KW - waste disposal KW - carbonates KW - actinides KW - SEM data KW - 02D:Isotope geochemistry KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1312835587?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Radioanalytical+and+Nuclear+Chemistry&rft.atitle=Medium-resolution+autonomous+in+situ+gamma+detection+system+for+marine+and+coastal+waters&rft.au=Schwantes%2C+J+M%3BAddleman%2C+R+S%3BDavidson%2C+J+D%3BDouglas%2C+M%3BMeier%2C+D%3BMullen%2C+O+D%3BMyjak%2C+M%3BJones%2C+M+E%3BWoodring%2C+M+L%3BJohnson%2C+B%3BSantschi%2C+P+H&rft.aulast=Schwantes&rft.aufirst=J&rft.date=2009-12-01&rft.volume=282&rft.issue=3&rft.spage=889&rft.isbn=&rft.btitle=&rft.title=Journal+of+Radioanalytical+and+Nuclear+Chemistry&rft.issn=02365731&rft_id=info:doi/10.1007%2Fs10967-009-0325-y L2 - http://www.sciencedirect.com/science/journal/08832927 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2013, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2013-01-01 N1 - Number of references - 43 N1 - Document feature - illus. incl. 6 tables N1 - SuppNotes - Includes appendices N1 - Last updated - 2013-02-28 N1 - SubjectsTermNotLitGenreText - actinides; calcite; carbonates; chromatograms; chromium; environmental analysis; Hanford Site; hazardous waste; ICP mass spectra; ion chromatograms; isotopes; mass spectra; metals; models; phosphates; pollutants; pollution; precipitation; radioactive isotopes; radioactive waste; SEM data; soil pollution; solubility; spectra; technetium; thermodynamic properties; United States; uranium; Washington; waste disposal; water pollution; water-rock interaction; weathering; X-ray diffraction data DO - http://dx.doi.org/10.1016/j.apgeochem.2012.09.004 ER - TY - JOUR T1 - Forensic applications of light-element stable isotope ratios of Ricinus communis seeds and ricin preparations. AN - 1273618582; 23130759 AB - Seeds of the castor plant Ricinus communis are of forensic interest because they are the source of the poison ricin. We tested whether stable isotope ratios of castor seeds and ricin preparations can be used as a forensic signature. We collected over 300 castor seed samples worldwide and measured the C, N, O, and H isotope ratios of the whole seeds and oil. We prepared ricin by three different procedures, acetone extraction, salt precipitation, and affinity chromatography, and compared their isotope ratios to those of the source seeds. The N isotope ratios of the ricin samples and source seeds were virtually identical. Therefore, N isotope ratios can be used to correlate ricin prepared by any of these methods to source seeds. Further, stable isotope ratios distinguished >99% of crude and purified ricin protein samples in pairwise comparison tests. Stable isotope ratios therefore constitute a valuable forensic signature for ricin preparations. JF - Journal of forensic sciences AU - Kreuzer, Helen W AU - West, Jason B AU - Ehleringer, James R AD - Department of Biology, University of Utah, 257 South 1400 East, Salt Lake City, UT 84112, USA. Helen.Kreuzer@pnnl.gov Y1 - 2013/01// PY - 2013 DA - January 2013 SP - S43 EP - S51 VL - 58 Suppl 1 KW - Carbon Isotopes KW - 0 KW - Nitrogen Isotopes KW - Oxygen Isotopes KW - Salts KW - Acetone KW - 1364PS73AF KW - Deuterium KW - AR09D82C7G KW - Index Medicus KW - Chromatography, Affinity KW - Nitrogen Isotopes -- analysis KW - Forensic Sciences KW - Chemical Fractionation KW - Acetone -- chemistry KW - Chemical Precipitation KW - Oxygen Isotopes -- analysis KW - Deuterium -- analysis KW - Carbon Isotopes -- analysis KW - Bioterrorism KW - Seeds -- chemistry KW - Ricinus -- chemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1273618582?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+forensic+sciences&rft.atitle=Forensic+applications+of+light-element+stable+isotope+ratios+of+Ricinus+communis+seeds+and+ricin+preparations.&rft.au=Kreuzer%2C+Helen+W%3BWest%2C+Jason+B%3BEhleringer%2C+James+R&rft.aulast=Kreuzer&rft.aufirst=Helen&rft.date=2013-01-01&rft.volume=58+Suppl+1&rft.issue=&rft.spage=S43&rft.isbn=&rft.btitle=&rft.title=Journal+of+forensic+sciences&rft.issn=1556-4029&rft_id=info:doi/10.1111%2F1556-4029.12000 LA - English DB - ProQuest Environmental Science Collection N1 - Date completed - 2013-07-16 N1 - Date created - 2013-01-11 N1 - Date revised - 2017-02-17 N1 - Last updated - 2017-02-22 DO - http://dx.doi.org/10.1111/1556-4029.12000 ER - TY - JOUR T1 - An efficient algorithm for mapping imaging data to 3D unstructured grids in computational biomechanics. AN - 1273255863; 23293066 AB - Geometries for organ scale and multiscale simulations of organ function are now routinely derived from imaging data. However, medical images may also contain spatially heterogeneous information other than geometry that are relevant to such simulations either as initial conditions or in the form of model parameters. In this manuscript, we present an algorithm for the efficient and robust mapping of such data to imaging-based unstructured polyhedral grids in parallel. We then illustrate the application of our mapping algorithm to three different mapping problems: (i) the mapping of MRI diffusion tensor data to an unstructured ventricular grid; (ii) the mapping of serial cyrosection histology data to an unstructured mouse brain grid; and (iii) the mapping of computed tomography-derived volumetric strain data to an unstructured multiscale lung grid. Execution times and parallel performance are reported for each case. JF - International journal for numerical methods in biomedical engineering AU - Einstein, Daniel R AU - Kuprat, Andrew P AU - Jiao, Xiangmin AU - Carson, James P AU - Einstein, David M AU - Jacob, Richard E AU - Corley, Richard A AD - Systems Toxicology, Pacific Northwest National Laboratory, Richland, WA, U.S.A. daniel.einstein@pnnl.gov Y1 - 2013/01// PY - 2013 DA - January 2013 SP - 1 EP - 16 VL - 29 IS - 1 KW - Index Medicus KW - Animals KW - Biomechanical Phenomena KW - Mice KW - Radiography KW - Brain Mapping -- methods KW - Diffusion Magnetic Resonance Imaging -- methods KW - Imaging, Three-Dimensional -- methods KW - Algorithms KW - Brain -- diagnostic imaging UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1273255863?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=International+journal+for+numerical+methods+in+biomedical+engineering&rft.atitle=An+efficient+algorithm+for+mapping+imaging+data+to+3D+unstructured+grids+in+computational+biomechanics.&rft.au=Einstein%2C+Daniel+R%3BKuprat%2C+Andrew+P%3BJiao%2C+Xiangmin%3BCarson%2C+James+P%3BEinstein%2C+David+M%3BJacob%2C+Richard+E%3BCorley%2C+Richard+A&rft.aulast=Einstein&rft.aufirst=Daniel&rft.date=2013-01-01&rft.volume=29&rft.issue=1&rft.spage=1&rft.isbn=&rft.btitle=&rft.title=International+journal+for+numerical+methods+in+biomedical+engineering&rft.issn=2040-7947&rft_id=info:doi/10.1002%2Fcnm.2489 LA - English DB - ProQuest Environmental Science Collection N1 - Date completed - 2013-06-07 N1 - Date created - 2013-01-07 N1 - Date revised - 2017-02-17 N1 - Last updated - 2017-02-22 DO - http://dx.doi.org/10.1002/cnm.2489 ER - TY - JOUR T1 - COMMENTARY: WHAT IS THE HEALTH RISK OF 740 BQ L super(-1) OF TRITIUM? A PERSPECTIVE AN - 1268655671; 17516363 AB - There has been a renewed concern about tritium releases from nuclear power plants and potential human exposures. A recent paper by Kocher and Hoffman (2011) used the U.S. standards for tritium, 740 Bq L super(-1), to estimate radiation dose to humans. These doses were then used to estimate radiation risk. The risks were calculated with the linear no-threshold (LNT) model, incorporated a radiation effectiveness factor (REF) of 2.6 for tritium, included skin cancer in the risks, and considered age and gender. Their manuscript did an excellent job of calculating these factors and included the uncertainty that was present in estimating each parameter. This correspondence is written in response to the paper by Kocher and Hoffman to help communicate the magnitude of the risk from ingestion of tritium at the current controlled level of 740 Bq L super(-1). First, our letter provides a brief review of the literature on health effects of tritium in experimental animals. Second, it relates the doses from tritium calculated by Kocher and Hoffman to doses that are delivered by normal everyday activities. Finally, we discuss the limitations of the LNTH model used to calculate their risk estimates. JF - Health Physics AU - Brooks, AL AU - Couch, LA AU - Chad, SA AD - Biological Sciences Division, Pacific Northwest National Laboratory, 902 Battelle Blvd, P.O. Box 999, MSIN J4-02, Richland, WA 99352, USA, tbrooks@tricities.wsu.edu Y1 - 2013/01// PY - 2013 DA - Jan 2013 SP - 108 EP - 114 PB - Williams & Wilkins, 351 W. Camden St. Baltimore MD 21201 United States VL - 104 IS - 1 SN - 0017-9078, 0017-9078 KW - Risk Abstracts; Health & Safety Science Abstracts KW - Nuclear power plants KW - Health risks KW - USA KW - Age KW - Skin KW - Tritium KW - Reviews KW - Gender KW - Ingestion KW - Cancer KW - H 6000:Natural Disasters/Civil Defense/Emergency Management KW - R2 23060:Medical and environmental health UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1268655671?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ariskabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Health+Physics&rft.atitle=COMMENTARY%3A+WHAT+IS+THE+HEALTH+RISK+OF+740+BQ+L+super%28-1%29+OF+TRITIUM%3F+A+PERSPECTIVE&rft.au=Brooks%2C+AL%3BCouch%2C+LA%3BChad%2C+SA&rft.aulast=Brooks&rft.aufirst=AL&rft.date=2013-01-01&rft.volume=104&rft.issue=1&rft.spage=108&rft.isbn=&rft.btitle=&rft.title=Health+Physics&rft.issn=00179078&rft_id=info:doi/10.1097%2FHP.0b013e318261ea5c LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-01-01 N1 - Last updated - 2013-08-12 N1 - SubjectsTermNotLitGenreText - Health risks; Nuclear power plants; Age; Skin; Tritium; Reviews; Gender; Ingestion; Cancer; USA DO - http://dx.doi.org/10.1097/HP.0b013e318261ea5c ER - TY - JOUR T1 - Pd-Au bimetallic catalysts: understanding alloy effects from planar models and (supported) nanoparticles. AN - 1179552461; 22824870 AB - Pd-Au bimetallic catalysts often display enhanced catalytic activities and selectivities compared with Pd-alone catalysts. This enhancement is often caused by two alloy effects, i.e., ensemble and ligand effects. The ensemble effect is a dilution of surface Pd by Au. With increasing surface Au coverage, contiguous Pd ensembles disappear and isolated Pd ensembles form. For certain reactions, for example vinyl acetate synthesis, this effect is responsible for reaction rate enhancement via the formation of highly active surface sites, e.g., isolated Pd pairs. The disappearance of contiguous Pd ensembles also switches off side reactions catalyzed by these sites. This explains the selectivity increase of certain reactions, for example direct H(2)O(2) synthesis. The ligand effects are electronic perturbation of Pd by Au. Via direct charge transfer or by affecting bond lengths, the ligand effects cause the Pd d band to be more filled, moving the d-band center away from the Fermi level. Both changes make Pd more "atomic like" therefore binding reactants and products more weakly. For certain reactions, this eliminates a so-called "self-poisoning" effect and enhances activity/selectivity. JF - Chemical Society reviews AU - Gao, Feng AU - Goodman, D Wayne AD - Institute for Integrated Catalysis, Pacific Northwest National Laboratory, P.O. Box 999, Richland, WA 99352, USA. feng.gao@pnnl.gov Y1 - 2012/12/21/ PY - 2012 DA - 2012 Dec 21 SP - 8009 EP - 8020 VL - 41 IS - 24 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1179552461?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Chemical+Society+reviews&rft.atitle=Pd-Au+bimetallic+catalysts%3A+understanding+alloy+effects+from+planar+models+and+%28supported%29+nanoparticles.&rft.au=Gao%2C+Feng%3BGoodman%2C+D+Wayne&rft.aulast=Gao&rft.aufirst=Feng&rft.date=2012-12-21&rft.volume=41&rft.issue=24&rft.spage=8009&rft.isbn=&rft.btitle=&rft.title=Chemical+Society+reviews&rft.issn=1460-4744&rft_id=info:doi/10.1039%2Fc2cs35160a LA - English DB - ProQuest Environmental Science Collection N1 - Date completed - 2013-04-15 N1 - Date created - 2012-11-20 N1 - Date revised - 2017-02-17 N1 - Last updated - 2017-02-22 DO - http://dx.doi.org/10.1039/c2cs35160a ER - TY - JOUR T1 - Sensitivity studies of dust ice nuclei effect on cirrus clouds with the Community Atmosphere Model CAM5 AN - 1272737517; 17562845 AB - In this study the effect of dust aerosol on upper tropospheric cirrus clouds through heterogeneous ice nucleation is investigated in the Community Atmospheric Model version 5 (CAM5) with two ice nucleation parameterizations. Both parameterizations consider homogeneous and heterogeneous nucleation and the competition between the two mechanisms in cirrus clouds, but differ significantly in the number concentration of heterogeneous ice nuclei (IN) from dust. Heterogeneous nucleation on dust aerosol reduces the occurrence frequency of homogeneous nucleation and thus the ice crystal number concentration in the Northern Hemisphere (NH) cirrus clouds compared to simulations with pure homogeneous nucleation. Global and annual mean shortwave and longwave cloud forcing are reduced by up to 2.0 plus or minus 0.1 W m super(-2) (1 sigma uncertainty) and 2.4 plus or minus 0.1 W m super(-2), respectively due to the presence of dust IN, with the net cloud forcing change of -0.40 plus or minus 0.20 W m super(-2). Comparison of model simulations with in situ aircraft data obtained in NH mid-latitudes suggests that homogeneous ice nucleation may play an important role in the ice nucleation at these regions with temperatures of 205-230 K. However, simulations overestimate observed ice crystal number concentrations in the tropical tropopause regions with temperatures of 190-205 K, and overestimate the frequency of occurrence of high ice crystal number concentration (> 200 L super(-1)) and underestimate the frequency of low ice crystal number concentration (< 30 L super(-1)) at NH mid-latitudes. These results highlight the importance of quantifying the number concentrations and properties of heterogeneous IN (including dust aerosol) in the upper troposphere from the global perspective. JF - Atmospheric Chemistry and Physics AU - Liu, X AU - Shi, X AU - Zhang, K AU - Jensen, E J AU - Gettelman, A AU - Barahona, D AU - Nenes, A AU - Lawson, P AD - Atmospheric Science & Global Change Division, Pacific Northwest National Laboratory, Richland, WA, USA Y1 - 2012/12/19/ PY - 2012 DA - 2012 Dec 19 SP - 12061 EP - 12079 PB - European Geophysical Society, Max-Planck-Str. 13 Katlenburg-Lindau Germany VL - 12 IS - 24 SN - 1680-7316, 1680-7316 KW - Aqualine Abstracts; Water Resources Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources; Meteorological & Geoastrophysical Abstracts KW - Tropical tropopause KW - Tropopause KW - Atmospheric models KW - Nucleation KW - Aircraft KW - Atmospheric Chemistry KW - Ice KW - Atmospheric particulates KW - Aerosols KW - Ice nuclei KW - Temperature KW - Troposphere KW - Heterogeneous nucleation KW - Dusts KW - Cirrus clouds KW - Homogeneous nucleation KW - Model Studies KW - Clouds KW - Numerical simulations KW - Atmospheric forcing KW - Atmospheric chemistry KW - Ice nucleation KW - Eolian dust KW - AQ 00001:Water Resources and Supplies KW - SW 5010:Network design KW - M2 551.510.42:Air Pollution (551.510.42) KW - Q2 09188:Atmospheric chemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1272737517?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aaqualine&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Atmospheric+Chemistry+and+Physics&rft.atitle=Sensitivity+studies+of+dust+ice+nuclei+effect+on+cirrus+clouds+with+the+Community+Atmosphere+Model+CAM5&rft.au=Liu%2C+X%3BShi%2C+X%3BZhang%2C+K%3BJensen%2C+E+J%3BGettelman%2C+A%3BBarahona%2C+D%3BNenes%2C+A%3BLawson%2C+P&rft.aulast=Liu&rft.aufirst=X&rft.date=2012-12-19&rft.volume=282&rft.issue=3&rft.spage=825&rft.isbn=&rft.btitle=&rft.title=Journal+of+Radioanalytical+and+Nuclear+Chemistry&rft.issn=02365731&rft_id=info:doi/10.1007%2Fs10967-009-0305-2 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-01-01 N1 - Last updated - 2015-04-09 N1 - SubjectsTermNotLitGenreText - Clouds; Atmospheric particulates; Aerosols; Tropopause; Ice nuclei; Atmospheric chemistry; Atmospheric forcing; Troposphere; Eolian dust; Tropical tropopause; Numerical simulations; Heterogeneous nucleation; Ice nucleation; Cirrus clouds; Homogeneous nucleation; Atmospheric models; Atmospheric Chemistry; Nucleation; Ice; Aircraft; Temperature; Dusts; Model Studies DO - http://dx.doi.org/10.5194/acp-12-12061-2012 ER - TY - CPAPER T1 - Natural and Anthropogenic Aerosol Impacts on the Indian Summer Monsoon T2 - 2012 American Geophysical Union Fall Meeting (AGU 2012) AN - 1313123195; 6185041 JF - 2012 American Geophysical Union Fall Meeting (AGU 2012) AU - Rasch, Philip AU - Ganguly, Dilip AU - Velu, Vinoj AU - Yoon, Jin-Ho AU - Wang, Hailong Y1 - 2012/12/03/ PY - 2012 DA - 2012 Dec 03 KW - Summer KW - Anthropogenic factors KW - Monsoons KW - Aerosols UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313123195?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.atitle=Natural+and+Anthropogenic+Aerosol+Impacts+on+the+Indian+Summer+Monsoon&rft.au=Rasch%2C+Philip%3BGanguly%2C+Dilip%3BVelu%2C+Vinoj%3BYoon%2C+Jin-Ho%3BWang%2C+Hailong&rft.aulast=Rasch&rft.aufirst=Philip&rft.date=2012-12-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.issn=&rft_id=info:doi/ L2 - http://fallmeeting.agu.org/2012/scientific-program/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Integrated Assessment Model Evaluation T2 - 2012 American Geophysical Union Fall Meeting (AGU 2012) AN - 1313120136; 6194169 JF - 2012 American Geophysical Union Fall Meeting (AGU 2012) AU - Smith, Steven AU - Clarke, Leon AU - Edmonds, James AU - Weyant, John Y1 - 2012/12/03/ PY - 2012 DA - 2012 Dec 03 KW - Models UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313120136?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.atitle=Integrated+Assessment+Model+Evaluation&rft.au=Smith%2C+Steven%3BClarke%2C+Leon%3BEdmonds%2C+James%3BWeyant%2C+John&rft.aulast=Smith&rft.aufirst=Steven&rft.date=2012-12-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.issn=&rft_id=info:doi/ L2 - http://fallmeeting.agu.org/2012/scientific-program/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Emission Data For Climate-Chemistry Interactions T2 - 2012 American Geophysical Union Fall Meeting (AGU 2012) AN - 1313119185; 6190187 JF - 2012 American Geophysical Union Fall Meeting (AGU 2012) AU - Smith, Steven Y1 - 2012/12/03/ PY - 2012 DA - 2012 Dec 03 KW - Climate KW - Emissions KW - Data processing UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313119185?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.atitle=Emission+Data+For+Climate-Chemistry+Interactions&rft.au=Smith%2C+Steven&rft.aulast=Smith&rft.aufirst=Steven&rft.date=2012-12-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.issn=&rft_id=info:doi/ L2 - http://fallmeeting.agu.org/2012/scientific-program/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Uncertainty and Evaluation of Impacts Modeling at Regional Scales in Integrated Assessment: the Case of Buildings T2 - 2012 American Geophysical Union Fall Meeting (AGU 2012) AN - 1313118121; 6192440 JF - 2012 American Geophysical Union Fall Meeting (AGU 2012) AU - Clarke, Leon AU - Zhou, Yuyu AU - Eom, Jiyong AU - Kyle, Page AU - Daly, Don Y1 - 2012/12/03/ PY - 2012 DA - 2012 Dec 03 KW - Buildings UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313118121?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.atitle=Uncertainty+and+Evaluation+of+Impacts+Modeling+at+Regional+Scales+in+Integrated+Assessment%3A+the+Case+of+Buildings&rft.au=Clarke%2C+Leon%3BZhou%2C+Yuyu%3BEom%2C+Jiyong%3BKyle%2C+Page%3BDaly%2C+Don&rft.aulast=Clarke&rft.aufirst=Leon&rft.date=2012-12-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.issn=&rft_id=info:doi/ L2 - http://fallmeeting.agu.org/2012/scientific-program/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Life Cycle of Deep Convective Systems in a Lagrangian Framework: from Mid-latitude to Tropics T2 - 2012 American Geophysical Union Fall Meeting (AGU 2012) AN - 1313115487; 6194513 JF - 2012 American Geophysical Union Fall Meeting (AGU 2012) AU - Feng, Zhe AU - McFarlane, Sally AU - Hagos, Samson AU - Dong, Xiquan AU - Xi, Baike AU - Kennedy, Aaron AU - Lin, Bing AU - Minnis, Patrick Y1 - 2012/12/03/ PY - 2012 DA - 2012 Dec 03 KW - Life cycle KW - Tropical environments UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313115487?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.atitle=Life+Cycle+of+Deep+Convective+Systems+in+a+Lagrangian+Framework%3A+from+Mid-latitude+to+Tropics&rft.au=Feng%2C+Zhe%3BMcFarlane%2C+Sally%3BHagos%2C+Samson%3BDong%2C+Xiquan%3BXi%2C+Baike%3BKennedy%2C+Aaron%3BLin%2C+Bing%3BMinnis%2C+Patrick&rft.aulast=Feng&rft.aufirst=Zhe&rft.date=2012-12-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.issn=&rft_id=info:doi/ L2 - http://fallmeeting.agu.org/2012/scientific-program/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Characterizing seasonal and spatial distribution of East Asian dust: budget and radiative forcing T2 - 2012 American Geophysical Union Fall Meeting (AGU 2012) AN - 1313114388; 6193017 JF - 2012 American Geophysical Union Fall Meeting (AGU 2012) AU - Chen, Siyu AU - Zhao, Chun AU - Qian, Yun AU - Leung, Lai-Yung AU - Huang, Jianping Y1 - 2012/12/03/ PY - 2012 DA - 2012 Dec 03 KW - Seasonal variations KW - Dust KW - Spatial distribution KW - Sulfur dioxide KW - Budgets UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313114388?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.atitle=Characterizing+seasonal+and+spatial+distribution+of+East+Asian+dust%3A+budget+and+radiative+forcing&rft.au=Chen%2C+Siyu%3BZhao%2C+Chun%3BQian%2C+Yun%3BLeung%2C+Lai-Yung%3BHuang%2C+Jianping&rft.aulast=Chen&rft.aufirst=Siyu&rft.date=2012-12-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.issn=&rft_id=info:doi/ L2 - http://fallmeeting.agu.org/2012/scientific-program/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Groundwater Quality Impacts Related to Carbon Dioxide, Brine and Trace Metal Leakage into a Shallow, Unconfined Limestone Aquifer T2 - 2012 American Geophysical Union Fall Meeting (AGU 2012) AN - 1313111042; 6194742 JF - 2012 American Geophysical Union Fall Meeting (AGU 2012) AU - Bacon, Diana AU - Hou, Zhangshuan AU - Dai, Zhenxue AU - Zheng, Liange Y1 - 2012/12/03/ PY - 2012 DA - 2012 Dec 03 KW - Limestone KW - Aquifers KW - Leakage KW - Trace metals KW - Groundwater pollution KW - Carbon dioxide KW - Salinity effects KW - Brines KW - Aquifer UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313111042?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.atitle=Groundwater+Quality+Impacts+Related+to+Carbon+Dioxide%2C+Brine+and+Trace+Metal+Leakage+into+a+Shallow%2C+Unconfined+Limestone+Aquifer&rft.au=Bacon%2C+Diana%3BHou%2C+Zhangshuan%3BDai%2C+Zhenxue%3BZheng%2C+Liange&rft.aulast=Bacon&rft.aufirst=Diana&rft.date=2012-12-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.issn=&rft_id=info:doi/ L2 - http://fallmeeting.agu.org/2012/scientific-program/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Evaluating Aerosol Process Modules within the Framework of the Aerosol Modeling Testbed T2 - 2012 American Geophysical Union Fall Meeting (AGU 2012) AN - 1313109458; 6190827 JF - 2012 American Geophysical Union Fall Meeting (AGU 2012) AU - Fast, Jerome AU - Velu, Vinoj AU - Gustafson, William AU - Chapman, Elaine AU - Easter, Richard AU - Shrivastava, ManishKumar AU - Singh, Balwinder Y1 - 2012/12/03/ PY - 2012 DA - 2012 Dec 03 KW - Aerosols UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313109458?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.atitle=Evaluating+Aerosol+Process+Modules+within+the+Framework+of+the+Aerosol+Modeling+Testbed&rft.au=Fast%2C+Jerome%3BVelu%2C+Vinoj%3BGustafson%2C+William%3BChapman%2C+Elaine%3BEaster%2C+Richard%3BShrivastava%2C+ManishKumar%3BSingh%2C+Balwinder&rft.aulast=Fast&rft.aufirst=Jerome&rft.date=2012-12-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.issn=&rft_id=info:doi/ L2 - http://fallmeeting.agu.org/2012/scientific-program/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Vertical Velocity Statistics Derived from the New ARM Doppler Lidars T2 - 2012 American Geophysical Union Fall Meeting (AGU 2012) AN - 1313107812; 6184862 JF - 2012 American Geophysical Union Fall Meeting (AGU 2012) AU - Newsom, Rob Y1 - 2012/12/03/ PY - 2012 DA - 2012 Dec 03 KW - Lidar KW - Velocity KW - Statistics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313107812?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.atitle=Vertical+Velocity+Statistics+Derived+from+the+New+ARM+Doppler+Lidars&rft.au=Newsom%2C+Rob&rft.aulast=Newsom&rft.aufirst=Rob&rft.date=2012-12-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.issn=&rft_id=info:doi/ L2 - http://fallmeeting.agu.org/2012/scientific-program/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Near-term Forecasting of Solar Total and Direct Irradiance for Solar Energy Applications T2 - 2012 American Geophysical Union Fall Meeting (AGU 2012) AN - 1313104210; 6183647 JF - 2012 American Geophysical Union Fall Meeting (AGU 2012) AU - Long, Charles AU - Riihimaki, Laura AU - Berg, Larry Y1 - 2012/12/03/ PY - 2012 DA - 2012 Dec 03 KW - Solar energy KW - Prediction KW - Irradiance UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313104210?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.atitle=Near-term+Forecasting+of+Solar+Total+and+Direct+Irradiance+for+Solar+Energy+Applications&rft.au=Long%2C+Charles%3BRiihimaki%2C+Laura%3BBerg%2C+Larry&rft.aulast=Long&rft.aufirst=Charles&rft.date=2012-12-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.issn=&rft_id=info:doi/ L2 - http://fallmeeting.agu.org/2012/scientific-program/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Improving reservoir operations modeling for integration in a regional Earth system model T2 - 2012 American Geophysical Union Fall Meeting (AGU 2012) AN - 1313101319; 6191876 JF - 2012 American Geophysical Union Fall Meeting (AGU 2012) AU - Voisin, Nathalie AU - Li, Hongyi AU - Ward, Duane AU - Huang, Maoyi AU - Leung, Lai-Yung AU - Wigmosta, Mark Y1 - 2012/12/03/ PY - 2012 DA - 2012 Dec 03 KW - Reservoirs KW - Reservoir KW - Integration UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313101319?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.atitle=Improving+reservoir+operations+modeling+for+integration+in+a+regional+Earth+system+model&rft.au=Voisin%2C+Nathalie%3BLi%2C+Hongyi%3BWard%2C+Duane%3BHuang%2C+Maoyi%3BLeung%2C+Lai-Yung%3BWigmosta%2C+Mark&rft.aulast=Voisin&rft.aufirst=Nathalie&rft.date=2012-12-03&rft.volume=69&rft.issue=3-4&rft.spage=150&rft.isbn=&rft.btitle=&rft.title=Journal+of+Applied+Geophysics&rft.issn=09269851&rft_id=info:doi/10.1016%2Fj.jappgeo.2009.09.001 L2 - http://fallmeeting.agu.org/2012/scientific-program/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Comparative Reactivity Study of Natural Silicate Minerals in Wet Supercritical CO2 By In Situ Infrared Spectroscopy T2 - 2012 American Geophysical Union Fall Meeting (AGU 2012) AN - 1313099146; 6194217 JF - 2012 American Geophysical Union Fall Meeting (AGU 2012) AU - Thompson, Christopher AU - Schaef, Todd AU - Miller, Quin AU - Loring, John AU - Wang, Zhengrong AU - Johnson, Kevin AU - McGrail, Pete Y1 - 2012/12/03/ PY - 2012 DA - 2012 Dec 03 KW - I.R. spectroscopy KW - Minerals KW - Carbon dioxide KW - Infrared spectroscopy KW - Silicate minerals KW - silicates UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313099146?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.atitle=Comparative+Reactivity+Study+of+Natural+Silicate+Minerals+in+Wet+Supercritical+CO2+By+In+Situ+Infrared+Spectroscopy&rft.au=Thompson%2C+Christopher%3BSchaef%2C+Todd%3BMiller%2C+Quin%3BLoring%2C+John%3BWang%2C+Zhengrong%3BJohnson%2C+Kevin%3BMcGrail%2C+Pete&rft.aulast=Thompson&rft.aufirst=Christopher&rft.date=2012-12-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.issn=&rft_id=info:doi/ L2 - http://fallmeeting.agu.org/2012/scientific-program/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Why are aerosol indirect effect estimates by global models so large? T2 - 2012 American Geophysical Union Fall Meeting (AGU 2012) AN - 1313098620; 6190279 JF - 2012 American Geophysical Union Fall Meeting (AGU 2012) AU - Ghan, Steven AU - Wang, Minghuai AU - Morrison, Hugh Y1 - 2012/12/03/ PY - 2012 DA - 2012 Dec 03 KW - Aerosols KW - Models UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313098620?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.atitle=Why+are+aerosol+indirect+effect+estimates+by+global+models+so+large%3F&rft.au=Ghan%2C+Steven%3BWang%2C+Minghuai%3BMorrison%2C+Hugh&rft.aulast=Ghan&rft.aufirst=Steven&rft.date=2012-12-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.issn=&rft_id=info:doi/ L2 - http://fallmeeting.agu.org/2012/scientific-program/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Radiative Effects of Carbonaceous and Inorganic Aerosols over California during CalNex and CARES: Observations versus Model Predictions T2 - 2012 American Geophysical Union Fall Meeting (AGU 2012) AN - 1313097616; 6188312 JF - 2012 American Geophysical Union Fall Meeting (AGU 2012) AU - Vinoj, V AU - Fast, Jerome AU - Liu, Ying Y1 - 2012/12/03/ PY - 2012 DA - 2012 Dec 03 KW - USA, California KW - Prediction KW - Aerosols KW - Models UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313097616?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.atitle=Radiative+Effects+of+Carbonaceous+and+Inorganic+Aerosols+over+California+during+CalNex+and+CARES%3A+Observations+versus+Model+Predictions&rft.au=Vinoj%2C+V%3BFast%2C+Jerome%3BLiu%2C+Ying&rft.aulast=Vinoj&rft.aufirst=V&rft.date=2012-12-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.issn=&rft_id=info:doi/ L2 - http://fallmeeting.agu.org/2012/scientific-program/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - 4STAR Spectrometer for Sky-scanning Sun-tracking Atmospheric Research: Results from TCAP Summer 2012 Field Campaign T2 - 2012 American Geophysical Union Fall Meeting (AGU 2012) AN - 1313097593; 6188311 JF - 2012 American Geophysical Union Fall Meeting (AGU 2012) AU - Flynn, Connor AU - Dunnagan, Stephen AU - Johnson, Roy AU - Kassianov, Evgueni AU - Kluzek, Celine AU - Redemann, Jens AU - Russell, Philip AU - Schmid, Beat AU - Shinozuka, Yohei AU - Sinyuk, Aliaksandr AU - Segal-Rosenhaimer, Michal AU - Holben, Brent Y1 - 2012/12/03/ PY - 2012 DA - 2012 Dec 03 KW - Summer UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313097593?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.atitle=4STAR+Spectrometer+for+Sky-scanning+Sun-tracking+Atmospheric+Research%3A+Results+from+TCAP+Summer+2012+Field+Campaign&rft.au=Flynn%2C+Connor%3BDunnagan%2C+Stephen%3BJohnson%2C+Roy%3BKassianov%2C+Evgueni%3BKluzek%2C+Celine%3BRedemann%2C+Jens%3BRussell%2C+Philip%3BSchmid%2C+Beat%3BShinozuka%2C+Yohei%3BSinyuk%2C+Aliaksandr%3BSegal-Rosenhaimer%2C+Michal%3BHolben%2C+Brent&rft.aulast=Flynn&rft.aufirst=Connor&rft.date=2012-12-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.issn=&rft_id=info:doi/ L2 - http://fallmeeting.agu.org/2012/scientific-program/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Reduced Microbial Resilience after a 17-Year Climate Gradient Transplant Experiment T2 - 2012 American Geophysical Union Fall Meeting (AGU 2012) AN - 1313096769; 6194031 JF - 2012 American Geophysical Union Fall Meeting (AGU 2012) AU - Bailey, Vanessa AU - Fansler, Sarah AU - Bond-Lamberty, Ben AU - Liu, Chongxuan AU - Smith, Jeffrey AU - Bolton, Harvey Y1 - 2012/12/03/ PY - 2012 DA - 2012 Dec 03 KW - Transplants KW - Climate UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313096769?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.atitle=Reduced+Microbial+Resilience+after+a+17-Year+Climate+Gradient+Transplant+Experiment&rft.au=Bailey%2C+Vanessa%3BFansler%2C+Sarah%3BBond-Lamberty%2C+Ben%3BLiu%2C+Chongxuan%3BSmith%2C+Jeffrey%3BBolton%2C+Harvey&rft.aulast=Bailey&rft.aufirst=Vanessa&rft.date=2012-12-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.issn=&rft_id=info:doi/ L2 - http://fallmeeting.agu.org/2012/scientific-program/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Hydrologic and geochemical data assimilation at the Hanford 300 Area T2 - 2012 American Geophysical Union Fall Meeting (AGU 2012) AN - 1313096355; 6193967 JF - 2012 American Geophysical Union Fall Meeting (AGU 2012) AU - Chen, Xingyuan AU - Hammond, Glenn AU - Murray, Christopher AU - Zachara, John Y1 - 2012/12/03/ PY - 2012 DA - 2012 Dec 03 KW - USA, Washington, Hanford KW - Geochemistry KW - Data collection KW - Data processing UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313096355?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.atitle=Hydrologic+and+geochemical+data+assimilation+at+the+Hanford+300+Area&rft.au=Chen%2C+Xingyuan%3BHammond%2C+Glenn%3BMurray%2C+Christopher%3BZachara%2C+John&rft.aulast=Chen&rft.aufirst=Xingyuan&rft.date=2012-12-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.issn=&rft_id=info:doi/ L2 - http://fallmeeting.agu.org/2012/scientific-program/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Spatially-resolved stable isotope analysis of a hypersaline microbial mat T2 - 2012 American Geophysical Union Fall Meeting (AGU 2012) AN - 1313096005; 6182855 JF - 2012 American Geophysical Union Fall Meeting (AGU 2012) AU - Moran, James AU - Cory, Alexandra AU - Lindemann, Stephen AU - Fredrickson, James Y1 - 2012/12/03/ PY - 2012 DA - 2012 Dec 03 KW - Isotopes UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313096005?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.atitle=Spatially-resolved+stable+isotope+analysis+of+a+hypersaline+microbial+mat&rft.au=Moran%2C+James%3BCory%2C+Alexandra%3BLindemann%2C+Stephen%3BFredrickson%2C+James&rft.aulast=Moran&rft.aufirst=James&rft.date=2012-12-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.issn=&rft_id=info:doi/ L2 - http://fallmeeting.agu.org/2012/scientific-program/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Time-dependent Measurements of Dissolution-precipitation Reactions Caused by Caustic Waste Solutions At the Hanford Site Using Synchrotron Computed Microtomography T2 - 2012 American Geophysical Union Fall Meeting (AGU 2012) AN - 1313095334; 6189287 JF - 2012 American Geophysical Union Fall Meeting (AGU 2012) AU - Wang, Guohui AU - Jones, Keith AU - Um, Wooyong AU - Rockhold, Mark AU - Crandell, Lauren AU - Peters, Catherine AU - Lindquist, W Y1 - 2012/12/03/ PY - 2012 DA - 2012 Dec 03 KW - USA, Washington, Hanford Site KW - Wastes KW - Caustics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313095334?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.atitle=Time-dependent+Measurements+of+Dissolution-precipitation+Reactions+Caused+by+Caustic+Waste+Solutions+At+the+Hanford+Site+Using+Synchrotron+Computed+Microtomography&rft.au=Wang%2C+Guohui%3BJones%2C+Keith%3BUm%2C+Wooyong%3BRockhold%2C+Mark%3BCrandell%2C+Lauren%3BPeters%2C+Catherine%3BLindquist%2C+W&rft.aulast=Wang&rft.aufirst=Guohui&rft.date=2012-12-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.issn=&rft_id=info:doi/ L2 - http://fallmeeting.agu.org/2012/scientific-program/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Investigation of the impacts of Asian pollution on Pacific storm track using multi-scale modeling results T2 - 2012 American Geophysical Union Fall Meeting (AGU 2012) AN - 1313092345; 6180574 JF - 2012 American Geophysical Union Fall Meeting (AGU 2012) AU - Wang, Yuan AU - Wang, Minghuai AU - Ghan, Steven AU - Zhang, Renyi Y1 - 2012/12/03/ PY - 2012 DA - 2012 Dec 03 KW - Pacific KW - Storms KW - Pollution UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313092345?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.atitle=Investigation+of+the+impacts+of+Asian+pollution+on+Pacific+storm+track+using+multi-scale+modeling+results&rft.au=Wang%2C+Yuan%3BWang%2C+Minghuai%3BGhan%2C+Steven%3BZhang%2C+Renyi&rft.aulast=Wang&rft.aufirst=Yuan&rft.date=2012-12-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.issn=&rft_id=info:doi/ L2 - http://fallmeeting.agu.org/2012/scientific-program/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Implications of low SOA volatility and fragmentation reactions on the evolution of SOA in the atmosphere T2 - 2012 American Geophysical Union Fall Meeting (AGU 2012) AN - 1313089092; 6189014 JF - 2012 American Geophysical Union Fall Meeting (AGU 2012) AU - Shrivastava, ManishKumar AU - Zelenyuk, Alla AU - Imre, Dan AU - Easter, Richard AU - Beranek, Josef AU - Zaveri, Rahul AU - Fast, Jerome Y1 - 2012/12/03/ PY - 2012 DA - 2012 Dec 03 KW - Uncertainty KW - Atmosphere KW - Evolution UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313089092?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.atitle=Implications+of+low+SOA+volatility+and+fragmentation+reactions+on+the+evolution+of+SOA+in+the+atmosphere&rft.au=Shrivastava%2C+ManishKumar%3BZelenyuk%2C+Alla%3BImre%2C+Dan%3BEaster%2C+Richard%3BBeranek%2C+Josef%3BZaveri%2C+Rahul%3BFast%2C+Jerome&rft.aulast=Shrivastava&rft.aufirst=ManishKumar&rft.date=2012-12-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.issn=&rft_id=info:doi/ L2 - http://fallmeeting.agu.org/2012/scientific-program/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Because Doubt Is A Sure Thing: Incorporating Uncertainty Characterization Into Climate Change Decision-Making T2 - 2012 American Geophysical Union Fall Meeting (AGU 2012) AN - 1313085273; 6191083 JF - 2012 American Geophysical Union Fall Meeting (AGU 2012) AU - Moss, Richard AU - Rice, Jennie AU - Scott, Michael AU - Unwin, Stephen AU - Whitney, Paul Y1 - 2012/12/03/ PY - 2012 DA - 2012 Dec 03 KW - Climatic changes KW - Decision making UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313085273?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.atitle=Because+Doubt+Is+A+Sure+Thing%3A+Incorporating+Uncertainty+Characterization+Into+Climate+Change+Decision-Making&rft.au=Moss%2C+Richard%3BRice%2C+Jennie%3BScott%2C+Michael%3BUnwin%2C+Stephen%3BWhitney%2C+Paul&rft.aulast=Moss&rft.aufirst=Richard&rft.date=2012-12-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.issn=&rft_id=info:doi/ L2 - http://fallmeeting.agu.org/2012/scientific-program/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - The integrated Regional Earth System Model T2 - 2012 American Geophysical Union Fall Meeting (AGU 2012) AN - 1313075299; 6191827 JF - 2012 American Geophysical Union Fall Meeting (AGU 2012) AU - Kraucunas, Ian AU - Clarke, Leon AU - Dirks, James AU - Hejazi, Mohamad AU - Hibbard, Kathy AU - Huang, Maoyi AU - Janetos, Anthony AU - Kintner-Meyer, Michael AU - Kleese van Dam, Kerstin AU - Leung, Lai-Yung AU - Moss, Richard AU - Rice, Jennie AU - Scott, Michael AU - Thomson, Allison AU - West, Tristram AU - Whitney, Paul AU - Yang, Zhaoqing Y1 - 2012/12/03/ PY - 2012 DA - 2012 Dec 03 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313075299?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=Fourth+Asia-Pacific+Symposium+on+Radiochemistry+%28APSORC+2009%29&rft.atitle=Nuclear+Archeology+in+a+Bottle%3A+Evidence+of+Pre-Trinity+u.s.+Weapons+Activities+from+a+Waste+Burial+Site&rft.au=Schwantes%2C+Jon%3BDouglas%2C+Matthew%3BBonde%2C+Steven%3BBriggs%2C+James%3BFarmer%2C+Orville%3BGreenwood%2C+Lawrence%3BLepel%2C+Elwood%3BOrton%2C+Christopher%3BWacker%2C+John%3BLuksic%2C+Andrzej&rft.aulast=Schwantes&rft.aufirst=Jon&rft.date=2009-11-29&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Fourth+Asia-Pacific+Symposium+on+Radiochemistry+%28APSORC+2009%29&rft.issn=&rft_id=info:doi/ L2 - http://fallmeeting.agu.org/2012/scientific-program/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Uncertainty quantification and risk analyses of CO2 leakage in heterogeneous geological formations T2 - 2012 American Geophysical Union Fall Meeting (AGU 2012) AN - 1313073383; 6193910 JF - 2012 American Geophysical Union Fall Meeting (AGU 2012) AU - Hou, Zhangshuan AU - Murray, Christopher AU - Rockhold, Mark Y1 - 2012/12/03/ PY - 2012 DA - 2012 Dec 03 KW - Risk analysis KW - Leakage KW - Geology KW - Carbon dioxide UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313073383?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.atitle=Uncertainty+quantification+and+risk+analyses+of+CO2+leakage+in+heterogeneous+geological+formations&rft.au=Hou%2C+Zhangshuan%3BMurray%2C+Christopher%3BRockhold%2C+Mark&rft.aulast=Hou&rft.aufirst=Zhangshuan&rft.date=2012-12-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.issn=&rft_id=info:doi/ L2 - http://fallmeeting.agu.org/2012/scientific-program/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Hybrid Multiscale Simulation of Mixing-Controlled Biogeochemical Reactions T2 - 2012 American Geophysical Union Fall Meeting (AGU 2012) AN - 1313072108; 6185354 JF - 2012 American Geophysical Union Fall Meeting (AGU 2012) AU - Scheibe, Timothy AU - Schuchardt, Karen AU - Agarwal, Khushbu AU - Chase, Jared AU - Palmer, Bruce AU - Tartakovsky, Alexandre AU - Elsethagen, Todd AU - Redden, George Y1 - 2012/12/03/ PY - 2012 DA - 2012 Dec 03 KW - Biogeochemistry KW - Simulation KW - Hybrids UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313072108?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.atitle=Hybrid+Multiscale+Simulation+of+Mixing-Controlled+Biogeochemical+Reactions&rft.au=Scheibe%2C+Timothy%3BSchuchardt%2C+Karen%3BAgarwal%2C+Khushbu%3BChase%2C+Jared%3BPalmer%2C+Bruce%3BTartakovsky%2C+Alexandre%3BElsethagen%2C+Todd%3BRedden%2C+George&rft.aulast=Scheibe&rft.aufirst=Timothy&rft.date=2012-12-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.issn=&rft_id=info:doi/ L2 - http://fallmeeting.agu.org/2012/scientific-program/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Effects of Subsurface CO2 Reservoir Leaks on Overlying Groundwater Aquifer Geochemistry and Mineralogy T2 - 2012 American Geophysical Union Fall Meeting (AGU 2012) AN - 1313067427; 6183679 JF - 2012 American Geophysical Union Fall Meeting (AGU 2012) AU - Qafoku, Nikolla AU - Lawter, Amanda AU - Harvey, Omar AU - Wang, Guohui AU - Bacon, Diana AU - Gartman, Brandy AU - Brown, Chris Y1 - 2012/12/03/ PY - 2012 DA - 2012 Dec 03 KW - Mineralogy KW - Geochemistry KW - Aquifers KW - Ground water KW - Reservoirs KW - Carbon dioxide KW - Reservoir KW - Aquifer UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313067427?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.atitle=Effects+of+Subsurface+CO2+Reservoir+Leaks+on+Overlying+Groundwater+Aquifer+Geochemistry+and+Mineralogy&rft.au=Qafoku%2C+Nikolla%3BLawter%2C+Amanda%3BHarvey%2C+Omar%3BWang%2C+Guohui%3BBacon%2C+Diana%3BGartman%2C+Brandy%3BBrown%2C+Chris&rft.aulast=Qafoku&rft.aufirst=Nikolla&rft.date=2012-12-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.issn=&rft_id=info:doi/ L2 - http://fallmeeting.agu.org/2012/scientific-program/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - CO2 Storage and Enhance Gas Recovery from Shales: Insights from In Situ Experiments T2 - 2012 American Geophysical Union Fall Meeting (AGU 2012) AN - 1313064637; 6183237 JF - 2012 American Geophysical Union Fall Meeting (AGU 2012) AU - Schaef, Todd AU - McGrail, Pete AU - Miller, Quin AU - Glezakou, Vassiliki-Alexandra AU - Loring, John Y1 - 2012/12/03/ PY - 2012 DA - 2012 Dec 03 KW - Storage KW - Carbon dioxide KW - Shale UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313064637?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.atitle=CO2+Storage+and+Enhance+Gas+Recovery+from+Shales%3A+Insights+from+In+Situ+Experiments&rft.au=Schaef%2C+Todd%3BMcGrail%2C+Pete%3BMiller%2C+Quin%3BGlezakou%2C+Vassiliki-Alexandra%3BLoring%2C+John&rft.aulast=Schaef&rft.aufirst=Todd&rft.date=2012-12-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.issn=&rft_id=info:doi/ L2 - http://fallmeeting.agu.org/2012/scientific-program/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Diagnosis of the Marine Low Cloud Simulation in the NCAR Community Earth System Model (CESM) and the NCEP Global Forecast System (GFS) T2 - 2012 American Geophysical Union Fall Meeting (AGU 2012) AN - 1313060751; 6193453 JF - 2012 American Geophysical Union Fall Meeting (AGU 2012) AU - Xiao, Heng AU - Mechoso, Carlos AU - Sun, Ruiyu AU - Han, Jongil AU - Pan, Hualu AU - Park, Sungsu AU - Hannay, Cecile AU - Bretherton, Christopher AU - Teixeira, Joao Y1 - 2012/12/03/ PY - 2012 DA - 2012 Dec 03 KW - Simulation KW - Clouds UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313060751?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.atitle=Diagnosis+of+the+Marine+Low+Cloud+Simulation+in+the+NCAR+Community+Earth+System+Model+%28CESM%29+and+the+NCEP+Global+Forecast+System+%28GFS%29&rft.au=Xiao%2C+Heng%3BMechoso%2C+Carlos%3BSun%2C+Ruiyu%3BHan%2C+Jongil%3BPan%2C+Hualu%3BPark%2C+Sungsu%3BHannay%2C+Cecile%3BBretherton%2C+Christopher%3BTeixeira%2C+Joao&rft.aulast=Xiao&rft.aufirst=Heng&rft.date=2012-12-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.issn=&rft_id=info:doi/ L2 - http://fallmeeting.agu.org/2012/scientific-program/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - A Modeling Study of In-stream Tidal Energy Extraction and Its Potential Environmental Impacts in a Tidal Channel and Bay System T2 - 2012 American Geophysical Union Fall Meeting (AGU 2012) AN - 1313060531; 6180297 JF - 2012 American Geophysical Union Fall Meeting (AGU 2012) AU - Wang, Taiping AU - Yang, Zhaoqing AU - Copping, Andrea Y1 - 2012/12/03/ PY - 2012 DA - 2012 Dec 03 KW - Channels KW - Environmental impact KW - Tidal inlets KW - Tidal energy KW - Energy UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313060531?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.atitle=A+Modeling+Study+of+In-stream+Tidal+Energy+Extraction+and+Its+Potential+Environmental+Impacts+in+a+Tidal+Channel+and+Bay+System&rft.au=Wang%2C+Taiping%3BYang%2C+Zhaoqing%3BCopping%2C+Andrea&rft.aulast=Wang&rft.aufirst=Taiping&rft.date=2012-12-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.issn=&rft_id=info:doi/ L2 - http://fallmeeting.agu.org/2012/scientific-program/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Phase, Viscosity, Morphology, and Room Temperature Evaporation Rates of SOA Particles Generated from Different Precursors, at Low and High Relative Humidities, and their Interaction with Hydrophobic Organics T2 - 2012 American Geophysical Union Fall Meeting (AGU 2012) AN - 1313059344; 6189630 JF - 2012 American Geophysical Union Fall Meeting (AGU 2012) AU - Wilson, Jacqueline AU - Zelenyuk, Alla AU - Imre, Dan AU - Beranek, Josef AU - Abramson, Evan AU - Shrivastava, ManishKumar Y1 - 2012/12/03/ PY - 2012 DA - 2012 Dec 03 KW - Particulates KW - Temperature effects KW - Evaporation KW - Humidity KW - Morphology KW - Relative humidity KW - Hydrophobicity KW - Viscosity UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313059344?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.atitle=Phase%2C+Viscosity%2C+Morphology%2C+and+Room+Temperature+Evaporation+Rates+of+SOA+Particles+Generated+from+Different+Precursors%2C+at+Low+and+High+Relative+Humidities%2C+and+their+Interaction+with+Hydrophobic+Organics&rft.au=Wilson%2C+Jacqueline%3BZelenyuk%2C+Alla%3BImre%2C+Dan%3BBeranek%2C+Josef%3BAbramson%2C+Evan%3BShrivastava%2C+ManishKumar&rft.aulast=Wilson&rft.aufirst=Jacqueline&rft.date=2012-12-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.issn=&rft_id=info:doi/ L2 - http://fallmeeting.agu.org/2012/scientific-program/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Overview of ARM observations during the ARM MJO Investigation Experiment (AMIE) T2 - 2012 American Geophysical Union Fall Meeting (AGU 2012) AN - 1313049814; 6178655 JF - 2012 American Geophysical Union Fall Meeting (AGU 2012) AU - McFarlane, Sally AU - Long, Charles AU - Feng, Zhe AU - Comstock, Jennifer AU - Sivaraman, Chitra AU - Bharadwaj, Nitin AU - Johnson, Karen AU - Orr, Brad AU - Ritsche, Michael AU - Collis, Scott AU - Schumacher, Courtney AU - Ellis, Scott AU - Powell, Scott Y1 - 2012/12/03/ PY - 2012 DA - 2012 Dec 03 KW - Reviews UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313049814?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.atitle=Overview+of+ARM+observations+during+the+ARM+MJO+Investigation+Experiment+%28AMIE%29&rft.au=McFarlane%2C+Sally%3BLong%2C+Charles%3BFeng%2C+Zhe%3BComstock%2C+Jennifer%3BSivaraman%2C+Chitra%3BBharadwaj%2C+Nitin%3BJohnson%2C+Karen%3BOrr%2C+Brad%3BRitsche%2C+Michael%3BCollis%2C+Scott%3BSchumacher%2C+Courtney%3BEllis%2C+Scott%3BPowell%2C+Scott&rft.aulast=McFarlane&rft.aufirst=Sally&rft.date=2012-12-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.issn=&rft_id=info:doi/ L2 - http://agu-fm12.abstractcentral.com/s1agxt/com.scholarone.s1agxt.s1agxt/S1A.html?&CONFIG_ID=2516&USER_ID=1593989&ROLE_ID=18963&ROLE_TYPE_ID=17&PERSON2ROLE_ID=20398026&WORKFLOW_ID=17&CURRENT_PAGE=BROWSE_THE_PROGRAM&ALLOW_EDIT_INSTRUCTIONS_FL=N&SESSION_ADMIN_PERMISSION_FL=N&REVIEWER_ADMIN_PERMISSION_FL=N&DIRECT_LOGIN_FL=Y&HASH_KEY=3aRvExN6wHkxt5nbM5UJtoWanpg&STUB_ROLE_ID=0&TIME=1352828551976&SOURCE_URL=http://agu-fm12.abstractcentral.com LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Pore-scale simulation of microbial growth using a genome-scale metabolic model: Implications for Darcy-scale reactive transport T2 - 2012 American Geophysical Union Fall Meeting (AGU 2012) AN - 1313038217; 6189277 JF - 2012 American Geophysical Union Fall Meeting (AGU 2012) AU - Scheibe, Timothy AU - Tartakovsky, Guzel AU - Tartakovsky, Alexandre AU - Fang, Yilin AU - Mahadevan, Radhakrishnan AU - Lovley, Derek Y1 - 2012/12/03/ PY - 2012 DA - 2012 Dec 03 KW - Simulation KW - Growth rate KW - Genomes KW - Models UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313038217?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.atitle=Pore-scale+simulation+of+microbial+growth+using+a+genome-scale+metabolic+model%3A+Implications+for+Darcy-scale+reactive+transport&rft.au=Scheibe%2C+Timothy%3BTartakovsky%2C+Guzel%3BTartakovsky%2C+Alexandre%3BFang%2C+Yilin%3BMahadevan%2C+Radhakrishnan%3BLovley%2C+Derek&rft.aulast=Scheibe&rft.aufirst=Timothy&rft.date=2012-12-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+American+Geophysical+Union+Fall+Meeting+%28AGU+2012%29&rft.issn=&rft_id=info:doi/ L2 - http://fallmeeting.agu.org/2012/scientific-program/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - JOUR T1 - A computationally efficient equation of state for ternary gas hydrate systems AN - 1656036227; 2015-012544 AB - The potential energy resource of natural gas hydrates held in geologic accumulations, using lower volumetric estimates, is sufficient to meet the world demand for natural gas for nearly eight decades, at current rates of increase. As with other unconventional energy resources, the challenge is to economically produce the natural gas fuel. The gas hydrate challenge is principally technical. Meeting that challenge will require innovation, but more importantly, scientific research to understand the resource and its characteristics in porous media. The thermodynamic complexity of gas hydrate systems makes numerical simulation a particularly attractive research tool for understanding production strategies and experimental observations. Simply stated, producing natural gas from gas hydrate deposits requires releasing CH4 from solid gas hydrate. The conventional way to release CH4 is to dissociate the hydrate by changing the pressure and temperature conditions to those where the hydrate is unstable. Alternatively, the guest-molecule exchange technology releases CH4 by replacing it with more thermodynamically stable molecules (e.g., CO2, N2). This technology has three advantageous: 1) it sequesters greenhouse gas, 2) it potentially releases energy via an exothermic reaction, and 3) it retains the hydraulic and mechanical stability of the hydrate reservoir. Numerical simulation of the production of gas hydrates from geologic deposits requires accounting for coupled processes: multifluid flow, mobile and immobile phase appearances and disappearances, heat transfer, and multicomponent thermodynamics. The ternary gas hydrate system comprises five components (i.e., H2O, CH4, CO2, N2, and salt) and the potential for six phases (i.e., aqueous, nonaqueous liquid, gas, hydrate, ice, and precipitated salt). The equation of state for ternary hydrate systems has three requirements: 1) phase occurrence, 2) phase composition, and 3) phase properties. Numerical simulations that predict the production of geologic accumulations of gas hydrates have historically suffered from relatively slow execution times, compared with other multifluid, porous media systems, due to strong nonlinearities and phase transitions. The phase equilibria for the ternary gas hydrate system within the gas hydrate stability range of composition, temperature and pressure, includes regions where the gas hydrate is in equilibrium with gas, nonaqueous liquid, or mixtures of gas and nonaqeuous liquid near the CO2-CH4-N2 mixture critical point. In these regions, solutions to cubic equations of state can be nonconvergent without accurate initial guesses. A hybrid tabular-cubic equation of state is described which avoids convergence issues, but conserves the characteristics and advantages of the cubic equation of state approaches to phase equilibria calculations. The application of interest will be the production of a natural gas hydrate deposit from a geologic formation, using the guest molecule exchange process; where, a mixture of CO2 and N2 are injected into the formation. During the guest-molecule exchange, CO2 and N2 will predominately replace CH4 in the large and small cages of the sI structure, respectively. JF - American Geophysical Union Fall Meeting AU - White, M D AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract OS43B EP - 1824 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 02C:Geochemistry of rocks, soils, and sediments UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1656036227?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=A+computationally+efficient+equation+of+state+for+ternary+gas+hydrate+systems&rft.au=White%2C+M+D%3BAnonymous&rft.aulast=White&rft.aufirst=M&rft.date=2012-12-01&rft.volume=2012&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-02-19 N1 - CODEN - #07548 ER - TY - JOUR T1 - Towards improved 3D cross-borehole electrical resistivity imaging of discrete fracture networks AN - 1648908751; 2015-010416 AB - There is a need to better characterize discrete fractures in contaminated bedrock aquifers to determine the migration of injected remediation amendments away from boreholes. A synthetic cross-borehole electrical resistivity study was conducted assuming a discrete fracture model of an existing contaminated site with known fracture locations. Four boreholes and two discrete fracture zones, assumed to be the dominant electrical and hydraulically conductive pathways, were explicitly modeled within an unstructured tetrahedral finite-element mesh. To simulate field conditions, 5% random Gaussian noise was added to all synthetic datasets. We first evaluated different regularization constraints starting with an uninformed smoothness-constrained inversion, to which a priori information was incrementally added. We found major improvements when (1) smoothness regularization constraints were relaxed (or disconnected) along boreholes and fractures, (2) a homogeneous conductivity was assumed along boreholes, and (3) borehole conductivity constraints, which could be determined from a fluid specific-conductance log, were applied. We also evaluated the effect of including borehole packers on the fracture-zone model recovery. We found the estimated fracture-zone conductivities with the inclusion of packers were comparable to similar trials excluding the use of packers regardless of electrical potential changes. The misplacement of fracture regularization disconnects easily can be misinterpreted as actual fracture locations. Conductivities within misplaced disconnects were near the starting model value and removing smoothing between boreholes and assumed fracture locations helped in identifying incorrectly located fracture regularization disconnects. Model sensitivity structure improved when regularization disconnects were (1) applied along the boreholes and fracture zones, and (2) fracture-zone regularization disconnects were placed where actual fractures existed. A field study being conducted at a contaminated fractured rock site, the Naval Air Warfare Center (NAWC) in West Trenton, New Jersey, is being used to validate our approach. Electrical resistance measurements, borehole geophysical logs and hydraulic tests are being acquired from seven, 10 cm (4 in.) boreholes to characterize fractures in the contaminated fractured rock and monitor time-lapse amendment injections to determine the amendment transport path at the field scale. Our findings, to be validated in a field study, demonstrate that structural constraints used after careful evaluation of a priori information are critical to improving imaging of fracture electrical conductivities, locations and orientations. JF - American Geophysical Union Fall Meeting AU - Robinson, Judy AU - Slater, L D AU - Johnson, Timothy J AU - Ntarlagiannis, D AU - Lacombe, P AU - Johnson, C D AU - Tiedeman, C R AU - Goode, D AU - Day-Lewis, F D AU - Shapiro, A M AU - Lane, J W AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract NS43A EP - 03 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1648908751?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Towards+improved+3D+cross-borehole+electrical+resistivity+imaging+of+discrete+fracture+networks&rft.au=Robinson%2C+Judy%3BSlater%2C+L+D%3BJohnson%2C+Timothy+J%3BNtarlagiannis%2C+D%3BLacombe%2C+P%3BJohnson%2C+C+D%3BTiedeman%2C+C+R%3BGoode%2C+D%3BDay-Lewis%2C+F+D%3BShapiro%2C+A+M%3BLane%2C+J+W%3BAnonymous&rft.aulast=Robinson&rft.aufirst=Judy&rft.date=2012-12-01&rft.volume=2012&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-01-29 N1 - CODEN - #07548 ER - TY - JOUR T1 - Challenges in extracting information from large hydrogeophysical-monitoring datasets AN - 1648907791; 2015-008666 AB - Over the last decade, new automated geophysical data-acquisition systems have enabled collection of increasingly large and information-rich geophysical datasets. Concurrent advances in field instrumentation, web services, and high-performance computing have made real-time processing, inversion, and visualization of large three-dimensional tomographic datasets practical. Geophysical-monitoring datasets have provided high-resolution insights into diverse hydrologic processes including groundwater/surface-water exchange, infiltration, solute transport, and bioremediation. Despite the high information content of such datasets, extraction of quantitative or diagnostic hydrologic information is challenging. Visual inspection and interpretation for specific hydrologic processes is difficult for datasets that are large, complex, and (or) affected by forcings (e.g., seasonal variations) unrelated to the target hydrologic process. New strategies are needed to identify salient features in spatially distributed time-series data and to relate temporal changes in geophysical properties to hydrologic processes of interest while effectively filtering unrelated changes. Here, we review recent work using time-series and digital-signal-processing approaches in hydrogeophysics. Examples include applications of cross-correlation, spectral, and time-frequency (e.g., wavelet and Stockwell transforms) approaches to (1) identify salient features in large geophysical time series; (2) examine correlation or coherence between geophysical and hydrologic signals, even in the presence of non-stationarity; and (3) condense large datasets while preserving information of interest. Examples demonstrate analysis of large time-lapse electrical tomography and fiber-optic temperature datasets to extract information about groundwater/surface-water exchange and contaminant transport. JF - American Geophysical Union Fall Meeting AU - Day-Lewis, F D AU - Slater, L D AU - Johnson, T AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract H42A EP - 05 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1648907791?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Challenges+in+extracting+information+from+large+hydrogeophysical-monitoring+datasets&rft.au=Day-Lewis%2C+F+D%3BSlater%2C+L+D%3BJohnson%2C+T%3BAnonymous&rft.aulast=Day-Lewis&rft.aufirst=F&rft.date=2012-12-01&rft.volume=2012&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-01-29 N1 - CODEN - #07548 ER - TY - JOUR T1 - A low-cost, portable, ruggedized cosmic muon detector prototype for geological applications AN - 1645575770; 2015-005501 AB - Muons, neutrons and protons observed at the Earth's surface are generated by cosmic ray primaries causing cascades in the atmosphere. Cosmic muon tomography is a cost effective real time monitoring technique that can be applied to determine large scale displacement of reservoir fluids induced by injection of liquid or gas. Such technique would need a detector array with an overall sensitivity tailored to the monitored volume and the expected density change in the target geological formation over the projected injection time. A scalable detector system, able to withstand the harsh conditions of underground deployment is a must for the evaluation of this promising technique. This paper presents the design and construction of a portable muon flux monitor, known as the mu -Witness. The detector is based on coincidence counts between two scintillator panels to be used as an indicator of density-dependent attenuation of cosmic muon flux. The Muon Witness detector (mu -Witness) has been designed to be able to measure cosmic muon flux for periods of time of up to 40 days, using battery power. The prototype has been mounted in a ruggedized case to enable measurements in underground environments. The purpose of this prototype is to evaluate the feasibility of using 3D density tomography in geological applications. The efficiency of the detector has been experimentally determined to be 57+ or -3%. This measurement was performed by comparing the detector response to the response of a larger and more efficient muon counter in the same location. Using Monte Carlo simulations of the cosmic muon flux, and the measured efficiency, the projected sensitivities for density changes in large underground monitored volumes are presented as well as the results of a test run in a shallow underground facility. Along with a detector prototype, a model of the muon attenuation inversion must be developed in order to take into account the different energy and angular distribution of the cosmic muons, and other contributing factors such as altitude, magnetic field rigidity and time of the year. There has been extensive work on characterizing the cosmic ray showers and this work uses one of such parameterizations to model the cosmic muon flux. Monte Carlo simulations can model the passage of particles through matter, among them high energy muons going through Earth's subsurface. The first underground measurements carried out with the prototype are also presented. The mu -Witness detector collected measurements at Pacific Northwest National Laboratory, inside, outside, and in the shallow underground lab, which has a depth of approximately 30 meters water equivalent (mwe). The mu -Witness count rate was 2.51 + or - 0.04 muons/s, 2.61 + or - 0.05 muons/s, and 0.40 + or - 0.01 muons/s inside, outside and in the underground lab, respectively. Indoor measurements were expected to be lower than outdoors, as the laboratory overhead serves as overburden, and was estimated to be about 2 mwe. From these measurements, assuming an inverse linear attenuation, we can infer the mu -Witness density sensitivity to be -0.0752 count/s*mwe. This figure will aid in the design of a large detector system for field-scale deployment at the ground surface and in boreholes. JF - American Geophysical Union Fall Meeting AU - Aguayo Navarrete, Estanislao AU - Bonneville, Alain AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract P21A EP - 1835 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 02A:General geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1645575770?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=A+low-cost%2C+portable%2C+ruggedized+cosmic+muon+detector+prototype+for+geological+applications&rft.au=Aguayo+Navarrete%2C+Estanislao%3BBonneville%2C+Alain%3BAnonymous&rft.aulast=Aguayo+Navarrete&rft.aufirst=Estanislao&rft.date=2012-12-01&rft.volume=2012&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-01-15 N1 - CODEN - #07548 ER - TY - JOUR T1 - A probabilistic tsunami hazard assessment methodology and its application to Crescent City, CA AN - 1645571036; 2015-003252 AB - A PTHA methodology, based in large part on Probabilistic Seismic Hazard Assessment methods (e.g., Cornell, 1968; SSHAC, 1997; Geist and Parsons, 2005), was previously applied to Seaside, OR (Gonzalez, et al., 2009). This initial version of the method has been updated to include: a revised method to estimate tidal uncertainty; an improved method for generating stochastic realizations to estimate slip distribution uncertainty (Mai and Beroza, 2002; Blair, et al., 2011); additional near-field sources in the Cascadia Subduction Zone, based on the work of Goldfinger, et al. (2012); far-field sources in Japan, based on information updated since the 3 March 2011 Tohoku tsunami (Japan Earthquake Research Committee, 2011). The GeoClaw tsunami model (Berger, et. al, 2011) is used to simulate generation, propagation and inundation. We will discuss this revised PTHA methodology and the results of its application to Crescent City, CA. JF - American Geophysical Union Fall Meeting AU - Gonzalez, F I AU - Leveque, R J AU - Waagan, K AU - Adams, L AU - Lin, G AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract NH24A EP - 02 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1645571036?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=A+probabilistic+tsunami+hazard+assessment+methodology+and+its+application+to+Crescent+City%2C+CA&rft.au=Gonzalez%2C+F+I%3BLeveque%2C+R+J%3BWaagan%2C+K%3BAdams%2C+L%3BLin%2C+G%3BAnonymous&rft.aulast=Gonzalez&rft.aufirst=F&rft.date=2012-12-01&rft.volume=2012&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2015-01-15 N1 - CODEN - #07548 ER - TY - JOUR T1 - CO2 storage and enhance gas recovery from shales; insights from in situ experiments AN - 1641010998; 2015-002008 AB - Recent developments in hydraulic fracturing technologies have provided a basis for dramatic increases in natural gas production from shale and tight gas reservoirs. GIS data analysis shows that approximately 60% of U.S. stationary CO2 emission sources are within 50 miles of a currently operating or potential shale gas play. Those emission sources represent a potential supply of CO2 to support enhanced gas recovery operations to extend the economic production life of these shale gas fields. Conservative estimates of the CO2 storage capacity in these depleted shale gas reservoirs are around 10 GtCO2 potentially producing up to an additional 100 Tcf of gas. Hence, there is a critical need to better understand the fundamental factors controlling CO2 storage and secondary gas production in shales. Mineralogy of shale formations are complicated, often times containing varying amounts of different clay minerals (illite, kaolinite, chlorite, and montmorillonite) carbonates (calcite, siderite, and dolomite), feldspar, quartz, gypsum, and pyrite. Interactions of these minerals with wet scCO2 are mostly unknown and will ultimately control injectivity, methane production, and CO2 storage capacity through mineral volume changes. To investigate the interactions between important clay minerals and wet scCO2, we have conducted a series of experiments exposing selected clay minerals to scCO2 containing variable amounts of dissolved water. Observations by in situ XRD indicate the montmorillonite structure contracts when in contact with dry scCO2. Expansion is observed when the same mineral is exposed to wet scCO2. Degrees of expansion and contraction are related to total dissolved water content in the scCO2 and the amount of water in the interlayer and type of interlayer cation. Other clays such as kaolinite, chlorite, and illite appear stable and undergo no observable structural change during exposure to scCO2. Experiments are in progress with in situ optical spectroscopic probes to distinguish between physisorption, swelling, and chemical reactions among the different shale components in wet scCO2 environments. JF - American Geophysical Union Fall Meeting AU - Schaef, T AU - McGrail, P AU - Miller, Q R AU - Glezakou, V AU - Loring, J S AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract MR23D EP - 05 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1641010998?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=CO2+storage+and+enhance+gas+recovery+from+shales%3B+insights+from+in+situ+experiments&rft.au=Schaef%2C+T%3BMcGrail%2C+P%3BMiller%2C+Q+R%3BGlezakou%2C+V%3BLoring%2C+J+S%3BAnonymous&rft.aulast=Schaef&rft.aufirst=T&rft.date=2012-12-01&rft.volume=2012&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2014-12-31 N1 - CODEN - #07548 ER - TY - JOUR T1 - Atomistic simulations of clay minerals subject to variably hydrated supercritical CO2 AN - 1641010997; 2015-002059 AB - Commonly occurring clay minerals, such as phyllosilicates, tend to expand as they incorporate water. The ubiquitous presence and importance of clay minerals in caprock seals and shale gas plays undergoing enhanced gas recovery with CO2 requires much better understanding of chemically induced changes in these minerals upon contact with variably wet scCO2. Recent advances in our groups experimental techniques have enabled detailed characterization of the H2O/CO2 intercalation in a variety of montmorillonites. In parallel, we have also initiated density functional (DFT) simulations to help understand the interactions between layered materials and the water-bearing supercritical fluid alone or in the presence of sulfur-containing species, pertinent to mixed-gas injection conditions. Through our simulations, we expect to understand how CO2 interacts with different intra-layer ions under different degrees of hydration or the presence of sulfur-containing species, and how the overall swelling properties of the clays will be affected. Preliminary results indicate that clays with higher degrees of hydration are likely to expand more after CO2 intercalation, as illustrated in Figure 1. JF - American Geophysical Union Fall Meeting AU - Glezakou, V AU - Schaef, T AU - McGrail, P AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract MR33B EP - 2460 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 30:Engineering geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1641010997?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Atomistic+simulations+of+clay+minerals+subject+to+variably+hydrated+supercritical+CO2&rft.au=Glezakou%2C+V%3BSchaef%2C+T%3BMcGrail%2C+P%3BAnonymous&rft.aulast=Glezakou&rft.aufirst=V&rft.date=2012-12-01&rft.volume=2012&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2015, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2015-01-01 N1 - PubXState - DC N1 - Last updated - 2014-12-31 N1 - CODEN - #07548 ER - TY - JOUR T1 - 2D imaging in a 3D world; observing sub-grain scale variations and secondary mineral precipitates in reacted pore networks AN - 1637542561; 2014-104066 AB - Advancements in 3D imaging techniques and analysis methods, and easier access to benchtop 3D X-ray microscopes, have led to a proliferation of 3D imaging studies of chemical alterations within porous media. However, 2D imaging methods continue to offer complementary insights into processes controlling sub-grain scale variations in mineralogy and intragranular porosity that are often difficult to observe with 3D methods. For example, 2D imaging studies of mineral precipitation-induced changes in the pore network structure including detailed observations of distributions of secondary mineral precipitates can be coupled with 3D image analysis of a pore network to determine the pore properties required to infer permeability. In this work, the combined advantages of 2D and 3D imaging methods are highlighted through 3D X-ray Computed Microtomography (X-ray CT) and 2D Scanning Electron Microscopy (SEM) imaging of a reacted column experiment in the context of the Hanford, WA site and a sedimentary rock sample from the Alberta basin. Both samples were imaged using 3D X-ray CT imaging at a voxel resolution of 4 mu m and analyzed using 3DMA Rock to determine pore and throat size distributions as well as pore coordination numbers. Polished sections were then created from each sample and imaged using 2D SEM imaging with resolutions of 0.4 mu m for the reacted column and an order of magnitude larger for the sedimentary rock. 2D images were analyzed using an erosion dilation method to determine pore and throat size distributions that were then corrected using sample-specific bias correction factors. The permeability of each sample was predicted from pore network models informed with the 2D or 3D pore and throat size distributions and the coordination numbers determined from the 3D analysis. Differences in 2D and 3D image resolutions resulted in over- or under-estimating small pore throats and led to predicted permeabilities that differed by orders of magnitude. For both samples, higher resolution images resulted in over-estimating small pore throats and under-estimating expected permeability. While higher resolution images are generally favored, they may not improve predictions of permeability as they require additional processing to distinguish small flow-conducting pore throats from surface roughness features. While 3D imaging is required to determine the network coordination, 2D imaging is necessary to understand where secondary minerals precipitate within the pore network and to quantify sub-grain scale variations. These advantages are demonstrated through SEM imaging of polished sections from the reacted column experiment. 2D images revealed that secondary mineral precipitates occurred as a relatively uniform coating on grain surfaces, unrelated to mineralogy, pore size, or other factors. SEM images also revealed new observations of sub-grain scale variations that showed that Hanford sand grains have a high amount of intragranular porosity and mineral precipitates formed in intragranular regions. These observations, which are important to understanding the reactive system, could not have been made if 3D imaging was used exclusively. JF - American Geophysical Union Fall Meeting AU - Crandell, L E AU - Peters, C A AU - Um, Wooyong AU - Jones, K W AU - Lindquist, W B AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract H53G EP - 1610 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 06A:Sedimentary petrology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1637542561?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=2D+imaging+in+a+3D+world%3B+observing+sub-grain+scale+variations+and+secondary+mineral+precipitates+in+reacted+pore+networks&rft.au=Crandell%2C+L+E%3BPeters%2C+C+A%3BUm%2C+Wooyong%3BJones%2C+K+W%3BLindquist%2C+W+B%3BAnonymous&rft.aulast=Crandell&rft.aufirst=L&rft.date=2012-12-01&rft.volume=2012&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ L2 - http://abstractsearch.agu.org/meetings/2012/FM/sections/H/sessions/H53G/abstracts/H53G-1610.html LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-12-18 N1 - CODEN - #07548 ER - TY - JOUR T1 - Pore-scale experimental study of multiphase flow relevant to CO (sub 2) sequestration and biogeochemical reactive transport relevant to contaminant fate in the subsurface AN - 1637542334; 2014-104001 AB - Pore-scale micromodel experiments are being conducted at EMSL PNNL to gain better understanding of i) fundamental interfacial processes that control multiphase flow relevant to CO2 sequestration, and ii) biogeochemical reactive transport that affect the fate of contaminants in the subsurface. During the main drainage process, unstable capillary and viscous fingering mechanisms were observed in a nearly homogeneous micromodel and a dual-permeability micromodel that affect supercritical CO2 (scCO2, 9 MPa, 41 degree C) displacement of water from the pore space. During primary imbibition, water flooding of a micromodel partially saturated with scCO2 resulted in preferential dissolution of scCO2 (i.e., dissolution fingering). Micromodel experiments were also performed to investigate kinetics of reductive dissolution of hematite coating on grain surfaces when coupled with pore diffusion. Results showed hematite reduction rate in micropores where transport is dominated by diffusion is 1 to 2 orders of magnitude lower than macropores where transport is controlled by advection. JF - American Geophysical Union Fall Meeting AU - Zhang, Changyong AU - Oostrom, Martin AU - Liu, Chongxuan AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract H52C EP - 03 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1637542334?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Pore-scale+experimental+study+of+multiphase+flow+relevant+to+CO+%28sub+2%29+sequestration+and+biogeochemical+reactive+transport+relevant+to+contaminant+fate+in+the+subsurface&rft.au=Zhang%2C+Changyong%3BOostrom%2C+Martin%3BLiu%2C+Chongxuan%3BAnonymous&rft.aulast=Zhang&rft.aufirst=Changyong&rft.date=2012-12-01&rft.volume=2012&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-12-18 N1 - CODEN - #07548 ER - TY - JOUR T1 - Plant uptake of cations under nutrient limitation; an environmental tracer study using Ca/Sr and K/Rb ratios AN - 1637541798; 2014-104025 AB - Vascular plant growth builds soils and ecosystem nutrient capital by sequestering and partitioning atmospheric CO (sub 2) into organic matter and continental runoff and driving terrestrial water and energy balances. Plant root-system functions, e.g. nutrient mobilization and uptake, are altered by environmental stress. However, the stress-response relationships are poorly understood. Chemical tracers have potential for assessing contributions of nutrients from various nutrient pools. Our objective is to quantitatively study how varying degrees of nutrient limitation (and corresponding needs to extract base cations from mineral sources) influence Ca and K uptake functions in a plant-root-mineral system. We are studying plant-driven mineral weathering in column experiments with red pine (Pinus resinosa) seedlings. The columns contain quartz sand amended with anorthite and biotite that constitute the sole mineral sources of Ca and K. These minerals also contain known amounts of Sr and Rb, which exhibit chemical behavior similar to Ca and K, respectively. The solution source of Ca and K was varied by adding 0% (no dissolved Ca and K), 10%, 30%, or 100% of a full strength Ca and K nutrient solution through irrigation water in which both Sr and Rb concentrations were negligible. Selected columns were destructively sampled at 3, 6 and 9 months to harvest biomass and measure plant uptake of cations. We used Ca/Sr and K/Rb ratio results to estimate the contributions of Ca and K from mineral and solution sources. For the 0% nutrient treatment, the Ca/Sr and K/Rb ratios in total biomass at 3 months, compared with those in the mineral phases, suggested preferential uptake of Ca and K over Sr and Rb, respectively, and allowed us to determine uptake discrimination factors for both cations. The K/Rb ratios in total biomass increased with greater K availability in the solution source, as expected, but Ca/Sr ratios did not show any dependence on Ca availability in the solution source. Using a tracer mass balance model, we computed the fraction of K from the mineral source in the total biomass, which decreased with longer growth time and more K supply from the solution source. For Ca, the model results suggested that the mineral was the major source of Ca in the plants throughout the experiment. Comparison of results for above- and below-ground biomass showed significantly higher Ca/Sr and K/Rb ratios above ground, indicating strong fractionation of Ca and K during transport within the tree. Our results highlight the potential importance of species-specific and temporal variations in cation uptake that may require consideration as we work to understand water and nutrient cycles in aggrading forest ecosystems. JF - American Geophysical Union Fall Meeting AU - Shi, Zhenking AU - Keller, C K AU - Stacks, Daryl AU - Grant, Mike AU - Harsh, J B AU - Letourneau, Melissa AU - Gill, R A AU - Balogh-Brunstad, Z AU - Thomashow, L AU - Dohnalkova, Alice AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract H53C EP - 1533 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 02C:Geochemistry of rocks, soils, and sediments UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1637541798?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Plant+uptake+of+cations+under+nutrient+limitation%3B+an+environmental+tracer+study+using+Ca%2FSr+and+K%2FRb+ratios&rft.au=Shi%2C+Zhenking%3BKeller%2C+C+K%3BStacks%2C+Daryl%3BGrant%2C+Mike%3BHarsh%2C+J+B%3BLetourneau%2C+Melissa%3BGill%2C+R+A%3BBalogh-Brunstad%2C+Z%3BThomashow%2C+L%3BDohnalkova%2C+Alice%3BAnonymous&rft.aulast=Shi&rft.aufirst=Zhenking&rft.date=2012-12-01&rft.volume=2012&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ L2 - http://abstractsearch.agu.org/meetings/2012/FM/sections/H/sessions/H53C/abstracts/H53C-1533.html LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-12-18 N1 - CODEN - #07548 ER - TY - JOUR T1 - Addressing model selection uncertainty in bioremediation experiments through Bayesian model aggregation AN - 1637540382; 2014-103894 AB - Strategies for applying technologies to complex problems such as carbon sequestration, chemical waste bioremediation, or subsurface contaminant transport are often based on the predictive results obtained from numerical simulation. A fundamental challenge to accurately assessing the accuracy of the modeled results arises from the fact that the underlying conceptual models that define the processes and outcomes are rarely known with a high degree of confidence. In this context, model selection uncertainty--i.e. the uncertainty associated with correctly selecting a set of domain-specific interpretations, processes, and mathematical systems--is one of the leading sources for error in predictive modeling. This talk presents a Bayesian approach for constructing an aggregate prediction from an ensemble of initial models, and examines the two-fold benefit of this aggregate to help ameliorate the uncertainties associated with model selection. We first present the predictive performance trends for aggregates in comparison to those of the ensemble's constituents. Next, we examine the aggregate's diagnostic capabilities as a tool to help identify which constituents in the ensemble are more or less accurate than others. We propose that this diagnostic information provides a critical feedback loop for modelers to help refine and tune their assumptions for the problem. Our experiments and analysis are based on field data from an ongoing bioremediation experiment. JF - American Geophysical Union Fall Meeting AU - Gosink, Luke AU - Pulsipher, Trenton AU - Hou, Zhangshuan AU - Yabusaki, Steve AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract H51A EP - 1328 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1637540382?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Addressing+model+selection+uncertainty+in+bioremediation+experiments+through+Bayesian+model+aggregation&rft.au=Gosink%2C+Luke%3BPulsipher%2C+Trenton%3BHou%2C+Zhangshuan%3BYabusaki%2C+Steve%3BAnonymous&rft.aulast=Gosink&rft.aufirst=Luke&rft.date=2012-12-01&rft.volume=2012&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ L2 - http://abstractsearch.agu.org/meetings/2012/FM/sections/H/sessions/H51A/abstracts/H51A-1328.html LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-12-18 N1 - CODEN - #07548 ER - TY - JOUR T1 - Time-dependent measurements of dissolution-precipitation reactions caused by caustic waste solutions at the Hanford Site using synchrotron computed microtomography AN - 1637540318; 2014-104005 AB - Leaking of caustic (hyper-alkaline) radioactive wastes, generated from plutonium production during the Cold War and stored in underground storage tanks at Hanford Site (Richland, WA), has been detected in the subsurface. The caustic wastes leachate induces primary mineral dissolution (releasing Si) and subsequent secondary precipitation (feldspathoids, such as sodalite and cancrinite) in the sediments. The dissolution-precipitation reactions affect the transport of radioactive elements (90Sr and 137Cs) in the sub-surface through changing the morphology of the sediments. We studied here the changes of the morphology of the sediments caused by exposure of quartz sand or Hanford sediments to simulated tank waste leachates (2 M Na+, 1 M OH-, 1.053 M NO3-, 0.05 M Al3+ and 10-5 M Sr2+) using a series of steady-state-flow saturated column experiments. The 3D structures were determined using synchrotron computed microtomography (CMT) at the National Synchrotron Light Source. Sequential measurements were made at intervals over an exposure time of up to approximately 620 days with a pixel size of 4 mu m in mini columns (ID2.1 mm) packed with quartz sand, or with a pixel size of 11 mu m in intermediate size columns (ID19 mm) packed with Hanford sediments. Values for porosity as a function of treatment time were obtained showing major changes. Good agreement was found between the microstructure porosity determinations with results obtained from measurements on the composition of the treatment fluids. The results also show the changes in the three dimensional morphology of the sediment structures as a function of the treatment time. Good agreement was also found between observed and simulated porosity and aqueous chemistry obtained using the reactive transport simulator STOMP. A comparison of the CMT results with complementary high-resolution scanning electron microscopy scans will also be presented. JF - American Geophysical Union Fall Meeting AU - Wang, Guohui AU - Jones, K W AU - Um, Wooyong AU - Rockhold, Mark L AU - Crandell, L E AU - Peters, C A AU - Lindquist, W B AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract H52C EP - 07 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1637540318?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Time-dependent+measurements+of+dissolution-precipitation+reactions+caused+by+caustic+waste+solutions+at+the+Hanford+Site+using+synchrotron+computed+microtomography&rft.au=Wang%2C+Guohui%3BJones%2C+K+W%3BUm%2C+Wooyong%3BRockhold%2C+Mark+L%3BCrandell%2C+L+E%3BPeters%2C+C+A%3BLindquist%2C+W+B%3BAnonymous&rft.aulast=Wang&rft.aufirst=Guohui&rft.date=2012-12-01&rft.volume=2012&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-12-18 N1 - CODEN - #07548 ER - TY - JOUR T1 - Effects of subsurface CO2 reservoir leaks on overlying groundwater aquifer geochemistry and mineralogy AN - 1637536554; 2014-103881 AB - Carbon dioxide (CO2) sequestration in deep subsurface reservoirs has been recognized as a viable way to store anthropogenic CO2. However, not all potential risk factors associated with this technology have been identified. In an attempt to identify one of these risks, we studied the potential impacts of CO2 leaks from deep reservoirs on aquifer geochemistry and mineralogy. A series of wet chemical extractions and batch experiments were conducted with the objective to determine: i) time-dependent changes in groundwater pH, total dissolved solids, and contaminant concentrations; ii) the extent of mineral dissolution and solid phase transformations; and iii) contaminant(s) interactions with existing minerals and/or neophases formed during the experiments. Solid materials and simulated groundwater from two sites, the Edwards aquifer in Texas and the High Plains aquifer in Kansas, were used in this study. The solid materials were initially extracted with a concentrated nitric acid solution to determine total contaminant concentrations in these materials. The results showed that these materials had substantial concentrations of a variety of contaminants that may be mobilized during CO2 exposure. For example, the levels of Pb found in some nitric acid extraction samples were nearly 200 times the EPA drinking water limit. The results from batch experiments conducted with different flow rates of CO2 gas demonstrated that the groundwater pH decreased from a starting pH of 8.1 to a pH of 5.8, promoting mineral dissolution and contaminant release from the sediments. Additional studies are underway to understand the release of metals and contaminants under relevant field conditions (e.g., pH 5.0-8.5), determine changes in sediment mineralogy, and study mineral:contaminant interactions in the aquifer sediments exposed to the CO2 gas using a variety of microscopic and spectroscopic techniques. JF - American Geophysical Union Fall Meeting AU - Qafoku, Nik P AU - Lawter, Amanda AU - Harvey, O R AU - Wang, G AU - Bacon, Diana H AU - Gartman, Brandy AU - Brown, Chris AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract H44B EP - 03 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1637536554?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Effects+of+subsurface+CO2+reservoir+leaks+on+overlying+groundwater+aquifer+geochemistry+and+mineralogy&rft.au=Qafoku%2C+Nik+P%3BLawter%2C+Amanda%3BHarvey%2C+O+R%3BWang%2C+G%3BBacon%2C+Diana+H%3BGartman%2C+Brandy%3BBrown%2C+Chris%3BAnonymous&rft.aulast=Qafoku&rft.aufirst=Nik&rft.date=2012-12-01&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2009+ASME+International+Mechanical+Engineering+Congress+and+Exposition+%28IMECE+2009%29&rft.issn=&rft_id=info:doi/ L2 - http://abstractsearch.agu.org/meetings/2012/FM/sections/H/sessions/H44B/abstracts/H44B-03.html LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-12-18 N1 - CODEN - #07548 ER - TY - JOUR T1 - Characterization of persistent volatile contaminant sources in the vadose zone AN - 1637531363; 2014-101087 AB - Remediation activities over time will alter the subsurface distribution of contaminants and likely create significant changes in the source-zone architecture. A field method was demonstrated for use of data collected from multiple individual soil vapor extraction (SVE) system well tests to locate and characterize the distribution of persistent VOC sources in the vadose zone. Operational data collected at the Department of Energy's Hanford site were used to examine changes in source zone architecture over time due to SVE operation and to illustrate the source-zone characterization approach. Individual well test results confirmed a heterogeneous distribution of permeability and contaminant mass discharge throughout the vadose zone. The trends in mass discharge and concentration were analyzed to determine the location and extent of the primary source zone within a lower-permeability unit at the site. This information is useful to evaluate the performance of SVE operations, and support decisions concerning system alteration or closure based on risk assessments of the impact of vadose-zone sources on groundwater contamination or vapor intrusion. JF - American Geophysical Union Fall Meeting AU - Carroll, K C AU - Truex, M J AU - Brusseau, M L AU - Parker, K R AU - Mackley, R D AU - Rohay, V J AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract H43E EP - 1413 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1637531363?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Characterization+of+persistent+volatile+contaminant+sources+in+the+vadose+zone&rft.au=Carroll%2C+K+C%3BTruex%2C+M+J%3BBrusseau%2C+M+L%3BParker%2C+K+R%3BMackley%2C+R+D%3BRohay%2C+V+J%3BAnonymous&rft.aulast=Carroll&rft.aufirst=K&rft.date=2012-12-01&rft.volume=2012&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-12-18 N1 - CODEN - #07548 ER - TY - JOUR T1 - Groundwater quality impacts related to carbon dioxide, brine and trace metal leakage into a shallow, unconfined limestone aquifer AN - 1637531361; 2014-101054 AB - Accurate prediction of the impact of leaks related to geologic carbon sequestration on groundwater quality is limited by the complexity of subsurface aquifers and the geochemical reactions that control drinking water compositions. As a result, there is a high uncertainty associated with predictions, hampering monitoring plans, interpretation of the monitoring results, and mitigation plans for a given site. As a part of the National Risk Assessment Program (NRAP), funded by the U.S. Department of Energy, a model of the Edwards Aquifer in Texas has been developed to examine the geochemical impacts of leakage of CO (sub 2) and brine containing trace metals into an oxidizing unconfined, carbonate aquifer. We use STOMP-CO2-R, which is a multiphase flow simulator, coupled with the reactive transport module ECKEChem, both developed at PNNL, to simulate CO (sub 2) sequestration in deep saline formations and the associated reactions with formation minerals. The limestone almost entirely consists of calcite, with lesser amounts of dolomite and trace metals adsorbed on minor amounts of clay and iron oxides. A reduced order model of this more complex chemistry and physics based model has been developed to be included in a framework for quantifying the overall risks associated with CO (sub 2) injection, leaks and groundwater impacts. The aquifer model uses reduced-order models, provided by other NRAP groups, of CO (sub 2) and brine leakage from well bores and faults as inputs. Geochemical input parameters were varied to determine parameter sensitivity and to generate a response surface of output variables. The output variables were pH 500 ppm plume size and CO (sub 2) flux to atmosphere, as well the volume of aquifer with trace metal concentrations greater than their U.S. Environmental Protection Agency Maximum Contaminant Levels. The uncertain input parameters were CO (sub 2) /brine leak rate, brine composition, mineral surface area and volumetric percent, equilibrium coefficients, and kinetic rates. Hundreds of combinations of the input parameters were generated using Latin Hypercube Sampling, and simulations performed. Once the response surface was generated, the model input parameters were ranked for relative importance using the MARS (multi-variate adaptive regression splines) method. Finally, we developed reduced order models of the geochemical impacts of CO (sub 2) and brine with trace metal leakage into an unconfined limestone aquifer. We compare the results of the reduced order models, developed by two methods: polynomial nonlinear regression and stepwise backward removal approach by minimizing Akaike Information Criterion, to those of the full chemistry- and physics-based model. JF - American Geophysical Union Fall Meeting AU - Bacon, D H AU - Hou, Z AU - Dai, Z AU - Zheng, L AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract H33L EP - 05 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1637531361?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Groundwater+quality+impacts+related+to+carbon+dioxide%2C+brine+and+trace+metal+leakage+into+a+shallow%2C+unconfined+limestone+aquifer&rft.au=Bacon%2C+D+H%3BHou%2C+Z%3BDai%2C+Z%3BZheng%2C+L%3BAnonymous&rft.aulast=Bacon&rft.aufirst=D&rft.date=2012-12-01&rft.volume=2012&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-12-18 N1 - CODEN - #07548 ER - TY - JOUR T1 - Impact of the leaked CO (sub 2) from deep reservoirs on quality of shallow groundwater AN - 1637531193; 2014-101050 AB - One of the areas of concerns for geologic CO2 sequestration is the potential leakage of CO2 and brine from deeper storage reservoirs to shallow groundwater resources. This could lead to changes in shallow groundwater chemistry degrading water quality. As part of the National Risk Assessment Partnership (NRAP) for geologic CO2 sequestration project, we perform experimental and modeling studies to understand the mechanisms of the leaked CO2 and brine flow, transport and reaction with aquifer water and minerals. We have developed a 3-dimensional heterogeneous numerical model for an unconfined shallow aquifer that is being used to simulate the CO2 leakage and the associated geochemical interactions over 200 years. A Monte-Carlo analysis is performed to estimate the probability of plume sizes of the pH less than 6.5 and TDS larger than 500 ppm in the shallow aquifer. The metrics were chosen as proxies that indicate how groundwater quality is affected by leakage. The uncertain parameters in our study include five for describing geologic heterogeneity in the permeability (permeability mean, variance, integral range, anisotropic factor and porosity), one for lateral flow rate and five for defining the CO2 leakage rate in temporal and spatial domains. A global sensitivity analysis is conducted for three outputs (the amount of CO2 leaving the top of aquifer, the plume sizes of pH below 6.5 and TDS over 500 ppm). Finally, we derive one-, two- and three-dimensional response surfaces developed based on the 2000 process modeling results of CO2 and brine reactive transport models. These response surfaces have been incorporated into the system model CO2-PENS in order to calculate risk profiles that consider uncertainty in the sequestration reservoir, leaky wellbore and the shallow groundwater aquifer. JF - American Geophysical Union Fall Meeting AU - Dai, Z AU - Keating, E H AU - Viswanathan, H S AU - Pawar, R J AU - Bacon, D H AU - Carroll, S AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract H33L EP - 01 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1637531193?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Impact+of+the+leaked+CO+%28sub+2%29+from+deep+reservoirs+on+quality+of+shallow+groundwater&rft.au=Dai%2C+Z%3BKeating%2C+E+H%3BViswanathan%2C+H+S%3BPawar%2C+R+J%3BBacon%2C+D+H%3BCarroll%2C+S%3BAnonymous&rft.aulast=Dai&rft.aufirst=Z&rft.date=2012-12-01&rft.volume=2012&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-12-18 N1 - CODEN - #07548 ER - TY - JOUR T1 - An experimental and modeling study of grain-scale uranium desorption from field-contaminated sediments and the potential influence of microporosity on mass-transfer AN - 1637531053; 2014-101166 AB - The aquifer below the 300-Area of the Hanford site (Richland, WA, USA) is plagued by a persistent plume of dissolved uranium (U(VI)) in excess of the Environmental Protection Agency drinking water maximum contamination level even after the removal of highly contaminated sediments. The aquifer sediments in the seasonally saturated lower vadose zone act as both a source and sink for uranium during stage changes in the nearby Columbia River. Diffusion limitation of uranium mass-transfer within these sediments has been cited as a potential cause of the plume's persistence. Equilibrium U(VI) sorption is a strong function of variable chemical conditions, especially carbonate, hydrogen, and uranyl ion activities. Field-contaminated sediments from the site require up to 1,000 hours to reach equilibrium in static batch reactors. Increases in U(VI) concentrations over longer time-scales result from changes in chemical conditions, which drive reactions with sediments that favor U(VI) desorption. Grain-scale U(VI) sorption/desorption rates are slow, likely owing to diffusion of U(VI) and other solutes through intra-granular pore domains. In order to improve understanding of the impact of intra-granular diffusion and chemical reactions controlling grain-scale U(VI) release, experiments were conducted on individual particle size fractions of a <8 mm composite of field-contaminated, lower vadose zone sediments. For each size fraction, equilibrium U(VI) sorption/desorption in static batch reactors was well-described by surface complexation models over a range of chemical conditions applicable to the field site. Desorption rates from individual size fractions in flow-through batch reactors, examined under a single set of constant chemical conditions with multiple stop-flow events, were similar for all size fractions <2 mm. Kinetic U(VI) desorption in flow-through batch reactors was modeled using a multi-rate surface complexation approach, where sorption/desorption rates were assumed to be proportional to the displacement from equilibrium and multiple diffusion domains were described with a two-parameter lognormal distribution of mass-transfer rate coefficients. Parameters describing mass transfer were the same for all size fractions <2 mm but differed for the largest (2-8 mm) size fraction. The evolution of pH, along with dissolved cation and carbonate concentrations, was modeled using equilibrium cation exchange, rate-limited calcite dissolution, aerobic respiration, and silica dissolution. Desorption and chemical reaction models calibrated with individual size fractions predicted U(VI) and chemical composition as a function of time for the bulk sediment sample. Volumes of pores less than 2.4 nm, quantified using nitrogen adsorption-desorption isotherms, were the same for all size fractions < 2 mm, nearly double that of the 2-8 mm size fraction. Similarity in the observed pore volumes and multi-rate mass-transfer parameters across all size fractions <2 mm suggest the importance of pores in this size class in controlling slow grain-scale U(VI) desorption rates. Models like these provide a means for testing the influence of grain-scale mass-transfer on the persistence of U(VI) plume at the site. JF - American Geophysical Union Fall Meeting AU - Stoliker, D AU - Liu, Chongxuan AU - Kent, D B AU - Zachara, John M AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract H43E EP - 1406 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1637531053?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=An+experimental+and+modeling+study+of+grain-scale+uranium+desorption+from+field-contaminated+sediments+and+the+potential+influence+of+microporosity+on+mass-transfer&rft.au=Stoliker%2C+D%3BLiu%2C+Chongxuan%3BKent%2C+D+B%3BZachara%2C+John+M%3BAnonymous&rft.aulast=Stoliker&rft.aufirst=D&rft.date=2012-12-01&rft.volume=2012&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ L2 - http://abstractsearch.agu.org/meetings/2012/FM/sections/H/sessions/H43E/abstracts/H43E-1406.html LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-12-18 N1 - CODEN - #07548 ER - TY - JOUR T1 - Comparative reactivity study of natural silicate minerals in wet supercritical CO2 by in situ infrared spectroscopy AN - 1637530860; 2014-100951 AB - Long-term storage of CO2 in deep geologic reservoirs is one of the strategies being developed and implemented for reducing anthropogenic emissions of CO2 into the atmosphere. Reservoirs containing basalt or peridotite have the potential to permanently entrap the CO2 as silicate minerals react with the CO2 and formation waters to form stable carbonate minerals. Although the relevant reactions have been well studied in the aqueous phase, comparatively little work has focused on silicate mineral reactivity in the CO2-rich fluid containing dissolved water at conditions relevant to geologic carbon sequestration. In this study, we used in situ infrared spectroscopy to investigate the carbonation of naturally occurring samples of San Carlos olivine (Mg2SiO4), Bramble enstatite (MgSiO3), and a Hawaiian picritic basalt rich in olivine. To enhance reactivity, subsamples were micronized to obtain higher surface area materials, in the range of 14 to 23 m2g-1. Experiments were carried out at 50 degrees C and 91 bar by circulating a stream of dry or wet supercritical CO2 (scCO2) past a sample overlayer deposited on the window of a high-pressure infrared flow cell. Water concentrations ranged from 0% to 135% relative to saturation, and transmission-mode absorbance spectra were recorded as a function of time for 24 hours. In experiments with excess water, a controlled temperature gradient was used to intentionally condense a film of liquid water on the overlayers' surfaces. No discernible reaction was detected when the samples were exposed to dry scCO2. When water was added to the scCO2, a thin film of liquid-like water formed on the surfaces of each sample, followed by spectral evidence of carbonation. The extents of reaction were dependent on both the thickness of the water films and the materials being tested. The thinnest water film was associated with the Bramble enstatite, which also appeared minimally reactive. The Hawaiian picritic basalt was slightly more reactive but contained the thickest water films. In contrast, spectra collected from the San Carlos olivine contained the most intense peak around 1425 cm-1, which corresponds to an asymmetric C-O stretching mode of a carbonate precipitate. Overall, spectral features common to all of the samples show mineral dissolution, the formation of carbonate precipitates, and precipitation of amorphous silica. Implications about the role of water in these reactions and the relative rates of carbonation for different silicate minerals in water-bearing scCO2 will be discussed. JF - American Geophysical Union Fall Meeting AU - Thompson, C AU - Schaef, T AU - Miller, Q R AU - Loring, J S AU - Wang, Z AU - Johnson, K T AU - McGrail, P AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract H32A EP - 08 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 01B:Mineralogy of silicates UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1637530860?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Comparative+reactivity+study+of+natural+silicate+minerals+in+wet+supercritical+CO2+by+in+situ+infrared+spectroscopy&rft.au=Thompson%2C+C%3BSchaef%2C+T%3BMiller%2C+Q+R%3BLoring%2C+J+S%3BWang%2C+Z%3BJohnson%2C+K+T%3BMcGrail%2C+P%3BAnonymous&rft.aulast=Thompson&rft.aufirst=C&rft.date=2012-12-01&rft.volume=2012&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-12-18 N1 - CODEN - #07548 ER - TY - JOUR T1 - Contaminant mass discharge and mass removal behavior for a DNAPL field site AN - 1637527508; 2014-101172 AB - The use of contaminant-mass-discharge measurements to characterize site conditions and remediation performance is becoming more widespread. Almost all applications to date have been based on conducting one or two discrete measurements (e.g., collected before and after a remedial action). While this approach provides useful information, additional insight can be gained by measuring time-continuous profiles of contaminant mass discharge (CMD). The objective of this study was to characterize the temporal behavior of contaminant mass discharge, and the relationship between reductions in CMD and reductions in contaminant mass, for a very heterogeneous, highly contaminated source-zone field site. Trichloroethene is the primary contaminant of concern, and several lines of evidence indicate the presence of organic liquid in the subsurface. The site is undergoing groundwater extraction for source control, and contaminant mass discharge has been monitored since system start-up 5 years ago. The results show a significant reduction in contaminant mass discharge with time, which has decreased from approximately 1 to 0.15 kg/d. Comparison of two sets of core data, collected 3.5 years apart, suggests that a significant reduction in aggregate sediment-phase TCE concentrations, approximately 80%, occurred between sampling events. These data were used to characterize the relationship between reductions in contaminant mass discharge and reductions in contaminant mass. The curvilinear, convex-upward relationship observed is consistent with a system wherein significant quantities of mass are present in hydraulically poorly accessible domains for which mass removal is influenced by rate-limited mass transfer. JF - American Geophysical Union Fall Meeting AU - Brusseau, M L AU - Matthieu, D E AU - Carroll, Kenneth C AU - Mainhagu, J AU - Morrison, C N AU - McMillan, A L AU - Russo, A E AU - Plaschke, M AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract H43E EP - 1412 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1637527508?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Contaminant+mass+discharge+and+mass+removal+behavior+for+a+DNAPL+field+site&rft.au=Brusseau%2C+M+L%3BMatthieu%2C+D+E%3BCarroll%2C+Kenneth+C%3BMainhagu%2C+J%3BMorrison%2C+C+N%3BMcMillan%2C+A+L%3BRusso%2C+A+E%3BPlaschke%2C+M%3BAnonymous&rft.aulast=Brusseau&rft.aufirst=M&rft.date=2012-12-01&rft.volume=2012&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ L2 - http://abstractsearch.agu.org/meetings/2012/FM/sections/H/sessions/H43E/abstracts/H43E-1412.html LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-12-18 N1 - CODEN - #07548 ER - TY - JOUR T1 - Pore scale investigations of transverse mixing limited reactions AN - 1637527217; 2014-101058 AB - Transverse mixing can limit reaction rates along the margins of contaminant plumes in groundwater, and at the leading edge of injected CO2 in deep saline aquifers. Reactions can be homogeneous, and involve the reaction and production of dissolved constituents, or heterogeneous, and involve the reaction of one or more solid substrates, and/or the production of solid substrates, e.g., minerals. Heterogeneous reactions increase complexity, because the pore space evolves as solid substrates dissolve, or as solid products are created. Changes in the pore space affects fluid residence time and contact, and therefore transverse mixing and subsequent reaction rates. In this talk, several factors that affect transverse mixing limited reactions will be discussed, and experimental results demonstrating the effects of transverse mixing on biogenic mineral production will be presented. JF - American Geophysical Union Fall Meeting AU - Werth, C J AU - Valocchi, A J AU - Zhang, C AU - Yoon, H AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract H33M EP - 01 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1637527217?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Atmospheric+Chemistry+and+Physics+Discussions&rft.atitle=Chemical+evolution+of+volatile+organic+compounds+in+the+outflow+of+the+Mexico+City+Metropolitan+area&rft.au=Apel%2C+E+C%3BEmmons%2C+L+K%3BKarl%2C+T%3BFlocke%2C+F%3BHills%2C+A+J%3BMadronich%2C+S%3BLee-Taylor%2C+J%3BFried%2C+A%3BWeibring%2C+P%3BWalega%2C+J%3BRichter%2C+D%3BTie%2C+X%3BMauldin%2C+L%3BCampos%2C+T%3BSive%2C+B%3BKleinman%2C+L%3BSpringston%2C+S%3BZaveri%2C+R%3BOrtega%2C+J%3BVoss%2C+P%3BBlake%2C+D%3BBaker%2C+A%3BWarneke%2C+C%3BWelsh-Bon%2C+D%3BGouw%2C+Jde%3BZheng%2C+J%3BZhang%2C+R%3BRudolph%2C+J%3BJunkermann%2C+W%3BRiemer%2C+D+D&rft.aulast=Apel&rft.aufirst=E&rft.date=2009-11-12&rft.volume=9&rft.issue=6&rft.spage=24085&rft.isbn=&rft.btitle=&rft.title=Atmospheric+Chemistry+and+Physics+Discussions&rft.issn=16807367&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-12-18 N1 - CODEN - #07548 ER - TY - JOUR T1 - Progress towards coupled simulation of surface/subsurface hydrologic processes and terrestrial ecosystem dynamics using the community models PFLOTRAN and CLM AN - 1637526862; 2014-101020 AB - Accurately simulating regional water cycle dynamics is challenging because of strong soil moisture-rainfall feedbacks and large uncertainties associated with vegetation and energy interactions. Earth system models of today cannot accurately capture such interactions, because current-generation land surface models (LSMs) 1) do not explicitly represent the fine-scale spatial variability of topography, soils, and vegetation that play a significant role in determining the response of hydrologic states (soil moisture) and fluxes (interception, infiltration, runoff, evapotranspiration) and 2) over-simplify or completely omit some key physical processes, such as lateral flow of water and heat, surface-subsurface interactions, realistic groundwater-vadose zone interactions, and freeze-thaw dynamics. Capturing such processes is critically important for predicting regional precipitation, vegetation productivity, and the disposition of carbon stored in potentially vulnerable permafrost under scenarios of climate change. Towards this end, we have added coupled surface water-groundwater interactions to the the open-source, massively parallel flow and reactive transport model PFLOTRAN, and have been developing a framework for coupling PFLOTRAN with the Community Land Model (CLM). PFLOTRAN is an open-source (LGPL-licensed) code -- with a growing community of users -- developed for simulation of multiscale, multiphase, multicomponent subsurface flow and reactive transport problems on machines ranging from laptops to leadership-class supercomputers. It has been applied in studies of contaminant fate and transport, geologic CO (sub 2) sequestration, and geothermal energy production, among others, and has been run using up to 262,144 processor cores on Jaguar, the Cray XK6 supercomputer at Oak Ridge National Laboratory. We have recently added a surface flow component in PFLOTRAN that is integrated with the subsurface. The underlying solver framework employed allows significant flexibility in how the governing equations are solved, and we will compare different surface flow formulations as well as coupling strategies between the surface and subsurface domains. Additionally, for studies of hydrology in Arctic regions, we have added a three-phase ice model. We will present some demonstrations of this capability and discuss solver strategies for handling the strong nonlinearities that arise. To provide a unified treatment of the unsaturated and saturated zones and to enable lateral redistribution of soil moisture (and eventually surface water, heat, and nutrients) in regional climate models, we have developed an approach for coupling PFLOTRAN with CLM. CLM is the global land model component used within the Community Earth System Model (CESM) to simulate an extensive set of biogeophysical and biogeochemical processes occurring at or near the terrestrial surface. We will describe our approach for replacing the existing CLM hydrology using PFLOTRAN and present some preliminary simulations undertaken with the CLM-PFLOTRAN coupled model. JF - American Geophysical Union Fall Meeting AU - Mills, R T AU - Bisht, G AU - Karra, S AU - Hoffman, F M AU - Hammond, G E AU - Kumar, J AU - Painter, S AU - Thornton, P E AU - Lichtner, P C AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract H33H EP - 1426 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1637526862?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Progress+towards+coupled+simulation+of+surface%2Fsubsurface+hydrologic+processes+and+terrestrial+ecosystem+dynamics+using+the+community+models+PFLOTRAN+and+CLM&rft.au=Mills%2C+R+T%3BBisht%2C+G%3BKarra%2C+S%3BHoffman%2C+F+M%3BHammond%2C+G+E%3BKumar%2C+J%3BPainter%2C+S%3BThornton%2C+P+E%3BLichtner%2C+P+C%3BAnonymous&rft.aulast=Mills&rft.aufirst=R&rft.date=2012-12-01&rft.volume=2012&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-12-18 N1 - CODEN - #07548 ER - TY - JOUR T1 - Uncertainty assessment at BC Cribs at hanford using the ASCEM toolset AN - 1637526685; 2014-101130 AB - Uncertainty assessments in subsurface applications typically neglect uncertainty in the conceptual model, and attribute uncertainty to errors in parameters and inputs. At the BC Cribs site at Hanford in southeastern Washington State, conceptualization of the system is highly uncertain because only sparse information is available for the geologic conceptual model and the physical and chemical properties of the sediments. In this contribution, uncertainty in the conceptual model is explored using the ASCEM (Advanced Simulation Capability for Environmental Management) toolset. The ASCEM toolset includes a high performance flow and reactive transport simulator (Amanzi), as well as a user environment called Akuna. Akuna provides a range of tools to manage environmental and simulator data sets, perform model setup, manage simulation data, and visualize results. Core toolsets beneath the user interface provide algorithms for performing sensitivity analyses, parameter estimation, and uncertainty quantification. In this contribution, the uncertainty in technetium-99 transport through a three-dimensional, heterogeneous vadose-zone system is quantified with Monte Carlo simulation. Results show that significant prediction uncertainty in simulated concentrations can be introduced by conceptual model variation. It is also shown that the ASCEM toolset represents an integrated modeling environment that facilitates model setup, parameter optimization, and uncertainty analyses through high-performance computing. JF - American Geophysical Union Fall Meeting AU - Freedman, Vicky L AU - Rockhold, Mark L AU - Chen, Xingyuan AU - Schuchardt, Karen AU - Pau, G AU - Vesselinov, V V AU - Porter, Ellen AU - Waichler, Scott AU - Freshley, Mark AU - Gorton, Ian AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract H43D EP - 1367 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1637526685?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Uncertainty+assessment+at+BC+Cribs+at+hanford+using+the+ASCEM+toolset&rft.au=Freedman%2C+Vicky+L%3BRockhold%2C+Mark+L%3BChen%2C+Xingyuan%3BSchuchardt%2C+Karen%3BPau%2C+G%3BVesselinov%2C+V+V%3BPorter%2C+Ellen%3BWaichler%2C+Scott%3BFreshley%2C+Mark%3BGorton%2C+Ian%3BAnonymous&rft.aulast=Freedman&rft.aufirst=Vicky&rft.date=2012-12-01&rft.volume=2012&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ L2 - http://abstractsearch.agu.org/meetings/2012/FM/sections/H/sessions/H43D/abstracts/H43D-1367.html LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-12-18 N1 - CODEN - #07548 ER - TY - JOUR T1 - Hybrid multiscale simulation of mixing-controlled biogeochemical reactions AN - 1637526602; 2014-101092 AB - Most in situ remediation methods rely strongly on mixing of contaminants and other chemical species to promote targeted reactions that degrade or immobilize contaminants. It is now well known that the conventional approach to Darcy-scale solute transport simulation tends to overestimate in situ reaction rates because the dispersion process conceptualization combines advective spreading (due to heterogeneity) and diffusive mixing in a single lumped representation. Hybrid multiscale simulation methods, which combine microscale (pore-scale) and macroscale (Darcy-scale) simulations within a single unified framework, offers the potential to address this problem by explicitly resolving local diffusive mixing as impacted by large-scale advective spreading in a computationally tractable manner. In this talk we present methods and results of a multiscale hybrid simulation approach applied to a mixing-controlled reaction at the laboratory scale. Our approach couples a Smoothed Particle Hydrodynamics (SPH) pore-scale simulator with the STOMP Darcy-scale simulator using a custom workflow management system that adaptively selects SPH sub-domains and provides the coupling between SPH and STOMP simulations seamlessly on a scalable parallel computational platform. JF - American Geophysical Union Fall Meeting AU - Scheibe, T D AU - Schuchardt, K L AU - Agarwal, K AU - Chase, J AU - Palmer, B J AU - Tartakovsky, A M AU - Elsethagen, T AU - Redden, G D AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract H34C EP - 08 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 02C:Geochemistry of rocks, soils, and sediments UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1637526602?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Hybrid+multiscale+simulation+of+mixing-controlled+biogeochemical+reactions&rft.au=Scheibe%2C+T+D%3BSchuchardt%2C+K+L%3BAgarwal%2C+K%3BChase%2C+J%3BPalmer%2C+B+J%3BTartakovsky%2C+A+M%3BElsethagen%2C+T%3BRedden%2C+G+D%3BAnonymous&rft.aulast=Scheibe&rft.aufirst=T&rft.date=2012-12-01&rft.volume=2012&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-12-18 N1 - CODEN - #07548 ER - TY - JOUR T1 - Spatially-resolved stable isotope analysis of a hypersaline microbial mat AN - 1629947827; 2014-092691 AB - Hot Lake is a hypersaline, meromictic lake located in north-central Washington. High rates of evapotranspiration coupled with its location in an endorrheic basin contribute to the lake's high salinity. The predominant dissolved salt is magnesium sulfate; hypolimnion waters may seasonally exceed 2 M magnesium sulfate concentrations. In addition to extreme salinity, horizons within the lake seasonally exceed 50 degrees C, in part due to the enhanced light absorption by magnesium sulfate-saturated water. Despite extreme and highly variable seasonal conditions (salinity, temperature, photon flux), dense benthic microbial mats composed of cyanobacteria and bacterial heterotroph populations develop annually at the lake. These mats may exceed 5 mm in thickness and display stratification observable by eye associated with dominant bacterial phototrophic pigments. Typical mat stratification includes an orange surface layer followed by green and purple layers at increasing depth into the mat. Carbonates including aragonite and magnesite are observed within the mat and their formation is likely induced or influenced by microbial activities. While not exclusively limited to the green stratum in the mat, maximum carbonate content is within this layer. We are exploring the role Hot Lake's microbial mats play in carbon cycling within the system. Namely, we seek to understand the rates of carbon accumulation in the mat and associated sediments and the various forms this carbon takes (organic or inorganic species). We are assessing mat development, community composition, and carbon accumulation in pre-cleaned devices installed at the lake as they are colonized by native mat. We are using laser ablation isotope ratio mass spectrometry (LA-IRMS) to provide spatially-resolved stable isotope analysis of mat cross-sections. Currently, this technique permits isotope analysis at the 50 mu m scale, and can provide multiple isotope analyses within the thickness of each major layer of the mat. We are also coupling LA-IRMS with a stable isotope probing experiment to determine the variable uptake and movement of inorganic carbon into different strata within the mat. To the best of our knowledge, this is the first application of the LA-IRMS approach to evaluating a complex microbial mat community. JF - American Geophysical Union Fall Meeting AU - Moran, J AU - Cory, A B AU - Lindemann, S R AU - Fredrickson, J K AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract B43L EP - 07 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 02D:Isotope geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1629947827?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Spatially-resolved+stable+isotope+analysis+of+a+hypersaline+microbial+mat&rft.au=Moran%2C+J%3BCory%2C+A+B%3BLindemann%2C+S+R%3BFredrickson%2C+J+K%3BAnonymous&rft.aulast=Moran&rft.aufirst=J&rft.date=2012-12-01&rft.volume=2012&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-12-04 N1 - CODEN - #07548 ER - TY - JOUR T1 - Surface- and groundwater interactions and their potential roles in modulating land-atmosphere interactions and regional climate under prolonged drought in the Southwest United States AN - 1629945545; 2014-095623 AB - IPCC Fourth Assessment predicted warmer and dryer conditions in the subtropical regions in the future. Particularly, climate models projected an imminent transition to warmer and more arid climate in the Southwest United States in the 21st century. Terrestrial response and its feedback to the atmosphere could be particularly important in determining the severity of droughts. In this study, we evaluate the response of the terrestrial hydrologic processes to future drought and their interactions with the atmosphere using a modified version of the Community Land Model (CLM4), in which the interactions between groundwater table, vertical distribution of soil moisture, and plant roots are represented by implementing parameterizations on surface and groundwater interactions from the Variable Infiltration Capacity (VIC) land surface model into CLM. The modified version of CLM4 (i.e., CLM4VICGROUND) is applied at small catchment and regional scales over the Southwest United States driven by observed and perturbed climate conditions to evaluate potential land surface responses and feedbacks in projected future Mega-drought. Our study suggests that surface and groundwater interactions, as an important aspect in terrestrial processes, might have profound impacts on different stages of droughts through its modification on root zone soil moisture, plant physiological responses, and therefore land and atmospheric interactions in the climate system. At the initial stage of drought, diffusion processes in the soil would help tap moisture in the deeper soil layers or groundwater table, and through stomatal response to maintain transpiration. However, when the groundwater table falls below a critical level as the land continues to dry, droughts could be intensified or prolonged as plants and surface processes become decoupled to subsurface processes. Simulations using CLM4VICGROUND coupled with the Weather Research and Forecasting model will be performed to evaluate the impacts of the feedback mechanisms on land-atmosphere interactions and regional climate. JF - American Geophysical Union Fall Meeting AU - Huang, M AU - Leung, L AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract GC53A EP - 1255 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1629945545?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Surface-+and+groundwater+interactions+and+their+potential+roles+in+modulating+land-atmosphere+interactions+and+regional+climate+under+prolonged+drought+in+the+Southwest+United+States&rft.au=Huang%2C+M%3BLeung%2C+L%3BAnonymous&rft.aulast=Huang&rft.aufirst=M&rft.date=2012-12-01&rft.volume=2012&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-12-04 N1 - CODEN - #07548 ER - TY - JOUR T1 - Intermittent properties of flow in porous media AN - 1629942937; 2014-098247 AB - From numerical simulations of pore-scale flow in porous media, we demonstrate the existence of an intermittent-like behaviour of Lagrangian velocities similar to the one observed in turbulent flows. This phenomenon, characterized by non-Gaussian distributions of Lagrangian velocity increments and long-range correlation of Lagrangian accelerations, is at the origin at the breakdown of the classical upscaled models. For transport in porous media this is manifested by anomalous scaling of the temporal evolution of the characteristic dispersion length, called anomalous dispersion. Long range correlation is related to the existence of stagnation zones and localized high velocity channels. While for turbulence, intermittency of Lagrangian velocities can be represented by multifractal random walk, for porous media we show that the dynamical picture is different and that this process is well captured by a correlated continuous time random walk. JF - American Geophysical Union Fall Meeting AU - De Anna, Pietro AU - Le Borgne, Tanguy AU - Dentz, Marco AU - Tartakovsky, Alexandre M AU - Bolster, Diogo AU - Davy, Philippe AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract H23B EP - 1351 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1629942937?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Intermittent+properties+of+flow+in+porous+media&rft.au=De+Anna%2C+Pietro%3BLe+Borgne%2C+Tanguy%3BDentz%2C+Marco%3BTartakovsky%2C+Alexandre+M%3BBolster%2C+Diogo%3BDavy%2C+Philippe%3BAnonymous&rft.aulast=De+Anna&rft.aufirst=Pietro&rft.date=2012-12-01&rft.volume=2012&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ L2 - http://abstractsearch.agu.org/meetings/2012/FM/sections/H/sessions/H23B/abstracts/H23B-1351.html LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-12-04 N1 - CODEN - #07548 ER - TY - JOUR T1 - Near two-decade instrument performance for hydrological monitoring at the prototype hanford barrier AN - 1629942206; 2014-093211 AB - Surface barriers have been proposed for use at the Department of Energy's Hanford Site as a means to isolate certain radioactive waste sites that, for reasons of cost or worker safety, may not be exhumed. The Hanford Prototype Barrier was constructed in 1994 using mostly natural materials to demonstrate its long-term performance. The barrier is expected to perform for at least 1000 years by limiting water, plant, animal, and human intrusion and minimizing erosion. Extensive instrumentation is used to monitor the hydrological regime above, within, below, and around the barrier. Specifically, natural precipitation and irrigation are measured with rain gauges, runoff water with a runoff flume, soil water content within the barrier at 12 stations with a neutron probe, a capacitance probe, and time-domain-reflectometry probes, and soil water pressure with gypsum blocks and heat-dissipation-units. Drainage through the barrier and the side slopes is measured with 12 water collection vaults, respectively, for 12 zones. Each drainage vault is equipped with a dosing siphon, a dose counter, a pressure transducer to measure the water level, and a tipping bucket to measure the inflow. During the near two-decade monitoring period, some of the instruments stopped functioning, while others still function normally till present. This presentation will summarize the performance of these instruments. Recommendations for future barrier monitoring will be given. JF - American Geophysical Union Fall Meeting AU - Zhang, Z Fred AU - Strickland, Christopher E AU - Clayton, Ray E AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract H11B EP - 1163 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1629942206?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Near+two-decade+instrument+performance+for+hydrological+monitoring+at+the+prototype+hanford+barrier&rft.au=Zhang%2C+Z+Fred%3BStrickland%2C+Christopher+E%3BClayton%2C+Ray+E%3BAnonymous&rft.aulast=Zhang&rft.aufirst=Z&rft.date=2012-12-01&rft.volume=2012&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ L2 - http://abstractsearch.agu.org/meetings/2012/FM/sections/H/sessions/H11B/abstracts/H11B-1163.html LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-12-04 N1 - CODEN - #07548 ER - TY - JOUR T1 - Regional patterns of recession curves and their relationships with climate, soil, vegetation and topography across the continental United States AN - 1629942115; 2014-093372 AB - Subsurface runoff is an important component of water balance especially in steep forested areas. It has been shown that the subsurface runoff parameterization significantly affects the partitioning of water budget, and subsequently the simulations of energy budget, carbon cycle and atmospheric cycle in land surface models such as the Community Land Model (CLM). A robust parameterization of subsurface runoff within land surface models, however, remains a grand challenge. This work is a first major step towards developing empirical relationships between the parameters of a generalized power-law form of TOPMODEL and measurable data such as climate, soil, vegetation and topographic conditions. We analyzed the flow data from over 300 MOPEX catchments across the continental United States and extracted the values of the recession curve coefficient and exponent in the form of the slope-recession curve, i.e., dQ/dt vs Q for each catchment. By improving the estimation of soil properties within MOPEX database such as the mean and variance of saturated hydraulic conductivity and porosity based on the SSURGO dataset for 30 selected catchments across the continent covering a range of climate conditions, we examined the regional patterns of recession curve coefficient and exponent. Our results suggest that the recession curve exponent is higher in the eastern humid Appalachian forested catchments but relatively smaller in the central flat catchments. We further explored the possible linkages between the exponent and coefficient and climate and landscape properties through data analyses and numerical experiments. Results of this study will serve as the basis for improving subsurface representations in CLM. JF - American Geophysical Union Fall Meeting AU - Ye, Shen AU - Li, Hongyi AU - Ali, M AU - Huang, Maoyi AU - Leung, L AU - Sivapalan, M AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract H13A EP - 1307 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 23:Geomorphology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1629942115?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Regional+patterns+of+recession+curves+and+their+relationships+with+climate%2C+soil%2C+vegetation+and+topography+across+the+continental+United+States&rft.au=Ye%2C+Shen%3BLi%2C+Hongyi%3BAli%2C+M%3BHuang%2C+Maoyi%3BLeung%2C+L%3BSivapalan%2C+M%3BAnonymous&rft.aulast=Ye&rft.aufirst=Shen&rft.date=2012-12-01&rft.volume=2012&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ L2 - http://abstractsearch.agu.org/meetings/2012/FM/sections/H/sessions/H13A/abstracts/H13A-1307.html LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-12-04 N1 - CODEN - #07548 ER - TY - JOUR T1 - Experimental study of potential wellbore cement carbonation by various phases of carbon dioxide during geologic carbon sequestration AN - 1629941946; 2014-098216 AB - Hydrated Portland cement was reacted with three different carbon dioxide (CO2) phases (supercritical, gaseous, and aqueous) to understand potential cement alteration processes along the length of a wellbore, extending from the deep CO2 storage reservoir to the shallow subsurface. Three-dimensional X-ray microtomography (XMT) images showed that cement alteration was significantly more extensive in CO2-saturated water experiments than in dry or wet supercritical CO2 experiments at high P (10 MPa)-T (50 degrees C) conditions. XMT imaging was capable of visualizing the degradation front with lower density and higher porosity as well as the carbonated zone with higher density and lower porosity in the cement matrix altered by CO2-saturated water. Scanning electron microscopy with energy dispersive spectroscopy (SEM-EDS) analysis showed a systematic change in Ca and C atom % in the cement matrix after reaction with CO2-saturated water for 1-5 months due to Ca depletion and C enrichment as a result of progressive carbonation. Integrated XMT and SEM-EDS analyses revealed that cement carbonation by CO2-saturated water formed three alteration zones; the degradation front, the carbonated zone, and the outermost porous zone. Cement pores in the carbonated zone were filled with CaCO3(s), resulting in a decrease in the porosity and permeability of the cement columns by an order of magnitude. In contrast, cement carbonation by dry or wet supercritical CO2 was slow and minor, and only a thin single carbonation zone was formed after exposure to dry supercritical CO2 for 15 months. Extensive calcite coating was formed on the outside surface of a cement sample after exposure to wet gaseous CO2 for 1-3 months, which reduced the pore volume of the cement by a factor of 3-6. The chemical-physical characterization of hydrated Portland cement after exposure to various phases of carbon dioxide indicates that the extent of cement carbonation can be significantly heterogeneous depending on CO2 phases present in the wellbore environment. Our experimental results also suggest that wellbore cement exposure to supercritical, gaseous, and aqueous phases of CO2 during geologic carbon sequestration is unlikely to damage the wellbore integrity. However, XMT imaging indicates that preferential cement alteration by supercritical CO2 or CO2-saturated water can occur along the cement-steel and cement-rock interfaces, which highlights the importance of further investigation of cement degradation along the interfaces to ensure permanent geologic carbon storage. JF - American Geophysical Union Fall Meeting AU - Jung, Hunbok AU - Um, Wooyong AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract H23A EP - 1320 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1629941946?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Experimental+study+of+potential+wellbore+cement+carbonation+by+various+phases+of+carbon+dioxide+during+geologic+carbon+sequestration&rft.au=Jung%2C+Hunbok%3BUm%2C+Wooyong%3BAnonymous&rft.aulast=Jung&rft.aufirst=Hunbok&rft.date=2012-12-01&rft.volume=64&rft.issue=11-12&rft.spage=1259&rft.isbn=&rft.btitle=&rft.title=Spectrochimica+Acta+Part+B+Atomic+Spectroscopy&rft.issn=05848547&rft_id=info:doi/10.1016%2Fj.sab.2009.10.002 L2 - http://abstractsearch.agu.org/meetings/2012/FM/sections/H/sessions/H23A/abstracts/H23A-1320.html LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-12-04 N1 - CODEN - #07548 ER - TY - JOUR T1 - Uncertainty quantification and risk analyses of CO (sub 2) leakage in heterogeneous geological formations AN - 1629941868; 2014-098322 AB - A stochastic sensitivity analysis framework is adopted to evaluate the impact of spatial heterogeneity in permeability on CO2 leakage risk. The leakage is defined as the total mass of CO2 moving into the overburden through the caprock-overburden interface, in both gaseous and liquid (dissolved) phases. The entropy-based framework has the ability to quantify the uncertainty associated with the input parameters in the form of prior pdfs (probability density functions). Effective sampling of the prior pdfs enables us to fully explore the parameter space and systematically evaluate the individual and combined effects of the parameters of interest on CO2 leakage risk. The parameters that are considered in the study include: mean, variance, and horizontal to vertical spatial anisotropy ratio for caprock permeability, and those same parameters for reservoir permeability. Given the sampled spatial variogram parameters, multiple realizations of permeability fields were generated using GSLIB subroutines. For each permeability field, a numerical simulator, STOMP, (in the water-salt-CO2-energy operational mode) is used to simulate the CO2 migration within the reservoir and caprock up to 50 years after injection. Due to intensive computational demand, we run both a scalable version simulator eSTOMP and serial STOMP on various supercomputers. We then perform statistical analyses and summarize the relationships between the parameters of interest (mean/variance/anisotropy ratio of caprock and reservoir permeability) and CO2 leakage ratio. We also present the effects of those parameters on CO2 plume radius and reservoir injectivity. The statistical analysis provides a reduced order model that can be used to estimate the impact of heterogeneity on caprock leakage. JF - American Geophysical Union Fall Meeting AU - Hou, Z AU - Murray, C J AU - Rockhold, M L AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract H31J EP - 08 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1629941868?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Uncertainty+quantification+and+risk+analyses+of+CO+%28sub+2%29+leakage+in+heterogeneous+geological+formations&rft.au=Hou%2C+Z%3BMurray%2C+C+J%3BRockhold%2C+M+L%3BAnonymous&rft.aulast=Hou&rft.aufirst=Z&rft.date=2012-12-01&rft.volume=2012&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-12-04 N1 - CODEN - #07548 ER - TY - JOUR T1 - Multiscale models for reactive transport in porous media AN - 1629941785; 2014-098198 AB - Under certain conditions, Darcy-scale reactive transport equations cannot provide sufficiently accurate predictions of multiphase flow and reactive transport. Pore-scale models are based on fundamental conservation laws and, in general, are more accurate than the Darcy-scale models. But, for domains of practical importance, number of unknowns in the pore-sale models may be on the order of billions or trillions and a direct solution of the pore-scale equations is often unfeasible even on modern super-computes. Several novel multiscale methods including a Langevin approach and a dimension reduction method based on a computational closure will be presented. The purpose of these methods is to provide an accurate description of the system averages while retaining critical pore-scale information. The advantages, range of applicability and limitations of the mentioned above multiscale methods will be discussed. JF - American Geophysical Union Fall Meeting AU - Tartakovsky, Alexandre M AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract H21M EP - 04 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 02C:Geochemistry of rocks, soils, and sediments UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1629941785?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Multiscale+models+for+reactive+transport+in+porous+media&rft.au=Tartakovsky%2C+Alexandre+M%3BAnonymous&rft.aulast=Tartakovsky&rft.aufirst=Alexandre&rft.date=2012-12-01&rft.volume=2012&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ L2 - http://abstractsearch.agu.org/meetings/2012/FM/sections/H/sessions/H21M/abstracts/H21M-04.html LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-12-04 N1 - CODEN - #07548 ER - TY - JOUR T1 - Monitoring CO (sub 2) sequestration into deep saline aquifer and associated salt intrusion using coupled multiphase flow modeling and time-lapse electrical resistivity tomography AN - 1629941655; 2014-098317 AB - Geological sequestration of carbon dioxide (CO (sub 2) ) into the subsurface has been considered as one solution to reduce greenhouse emission to the atmosphere. Successful sequestration process requires efficient and adequate monitoring of injected fluids as they migrate into the aquifer to evaluate flow path, leakage, and geochemical interactions between CO (sub 2) and geologic media. In this synthetic field scale study, we have integrated 3D multiphase flow modeling code PFLOTRAN with 3D time-laps electrical resistivity tomography (ERT) to gain insight into the supercritical (SC) CO (sub 2) plumes movement in the deep saline aquifer and associated brine intrusion into shallower fresh water aquifer. A parallel ERT forward and inverse modeling package was introduced, and related algorithms are briefly described. The capabilities and limitations of ERT in monitoring CO (sub 2) migration are assessed by comparing the results from PFLOTRAN simulations with the ERT inversion results. In general, our study shows the ERT inversion results compare well with PFLOTRAN with reasonable discrepancies, indicating that the ERT can capture the actual CO (sub 2) plume dynamics and brine intrusion. Detailed comparisons on the location, size and volume of CO (sub 2) plume show the ERT method underestimated area review and overestimated total plume volume in the predictions of SC CO (sub 2) movements. These comparisons also show the ERT method constantly overestimate salt intrusion area and underestimated total solute amount in the predictions of brine filtration. Our study shows that together with other geochemical and geophysical methods, ERT is a potentially useful monitoring tool in detecting the SC CO (sub 2) and formation fluid migrations. JF - American Geophysical Union Fall Meeting AU - Lu, C AU - Zhang, C AU - Huang, H AU - Johnson, T AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract H31J EP - 03 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1629941655?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Monitoring+CO+%28sub+2%29+sequestration+into+deep+saline+aquifer+and+associated+salt+intrusion+using+coupled+multiphase+flow+modeling+and+time-lapse+electrical+resistivity+tomography&rft.au=Lu%2C+C%3BZhang%2C+C%3BHuang%2C+H%3BJohnson%2C+T%3BAnonymous&rft.aulast=Lu&rft.aufirst=C&rft.date=2012-12-01&rft.volume=2012&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-12-04 N1 - CODEN - #07548 ER - TY - JOUR T1 - Characterizing reservoir properties using monitoring gas pressure data after CO (sub 2) -injection AN - 1629941543; 2014-098233 AB - This study evaluate the possibility of characterizing reservoir properties of permeability, porosity and entry pressure using CO2 monitoring data such as spatiotemporal distributions of gas pressure. The injection reservoir was set to be located 1400-1500 m below the ground surface so that CO2 remained in the supercritical state. The reservoir was assumed to contain five homogenous layers with alternating conductive and resistive properties, which is analogous to actual geological formations such as the Mount Simon Sandstone unit. The CO2 injection simulation used a cylindrical grid setting in which the injection well was situated at the center of the domain, which extended up to 8000 m from the injection well. The CO2 migration was simulated using the PNNL-developed simulator STOMP-CO2e (the water-salt-CO2 module). We adopted a nonlinear parameter estimation and optimization modeling software package, PEST, for automated reservoir parameter estimation. We explored the effects of data quality, data worth, and data redundancy on the detectability of reservoir parameters using CO2 pressure monitoring data, by comparing PEST inversion results using data with different levels of noises, various monitoring locations, and different data collection spacing and temporal sampling intervals. This study yielded insight into the use of CO2 monitoring data for reservoir characterization and how to design the monitoring system to optimize data worth and reduce data redundancy. JF - American Geophysical Union Fall Meeting AU - Fang, Zhufeng AU - Hou, Zhangshuan AU - Lin, Guang AU - Fang, Yilin AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract H23A EP - 1337 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1629941543?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Characterizing+reservoir+properties+using+monitoring+gas+pressure+data+after+CO+%28sub+2%29+-injection&rft.au=Fang%2C+Zhufeng%3BHou%2C+Zhangshuan%3BLin%2C+Guang%3BFang%2C+Yilin%3BAnonymous&rft.aulast=Fang&rft.aufirst=Zhufeng&rft.date=2012-12-01&rft.volume=2012&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ L2 - http://abstractsearch.agu.org/meetings/2012/FM/sections/H/sessions/H23A/abstracts/H23A-1337.html LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-12-04 N1 - CODEN - #07548 ER - TY - JOUR T1 - Silicate carbonation processes in water-bearing supercritical CO2 fluids; implications for geologic carbon sequestration AN - 1629941443; 2014-098219 AB - Global climate change is viewed by many as an anthropogenic phenomenon that could be mitigated through a combination of conservation efforts, alternative energy sources, and the development of technologies capable of reducing carbon dioxide (CO2) emissions. Continued increases of atmospheric CO2 concentrations are projected over the next decade, due to developing nations and growing populations. One economically favorable option for managing CO2 involves subsurface storage in deep basalt formations. The silicate minerals and glassy mesostasis basalt components act as metal cation sources, reacting with the CO2 to form carbonate minerals. Most prior work on mineral reactivity in geologic carbon sequestration settings involves only aqueous dominated reactions. However, in most sequestration scenarios, injected CO2 will reside as a buoyant fluid in contact with the sealing formation (caprock) and slowly become water bearing. Comparatively little laboratory research has been conducted on reactions occurring between minerals in the host rock and the wet scCO2. In this work, we studied the carbonation of wollastonite [CaSiO3] exposed to variably wet supercritical CO2 (scCO2) at a range of temperatures (50, 55 and 70 degrees C) and pressures (90,120 and 160 bar) in order to gain insight into reaction processes. Mineral transformation reactions were followed by two novel in situ high pressure techniques, including x-ray diffraction that tracked the rate and extents of wollastonite conversion to calcite. Increased dissolved water concentrations in the scCO2 resulted in increased carbonation approaching approximately 50 wt.%. Development of thin water films on the mineral surface were directly observed with infrared (IR) spectroscopy and indirectly with 18O isotopic labeling techniques (Raman spectroscopy). The thin water films were determined to be critical for facilitating carbonation processes in wet scCO2. Even in extreme low water conditions, the IR technique detected the formation of amorphous silica. Unlike the thick (<10 mu m) passivating silica layers observed in the reacted samples from fully water saturated scCO2 experiments, images obtained from a focused ion beam sectioned sample indicted these coatings were chemically wollastonite but structurally amorphous. In addition, evidence of an intermediate hydrated amorphous calcium carbonate forming under these conditions further emphasize the importance of understanding geochemical processes occurring in water-bearing scCO2 fluids. JF - American Geophysical Union Fall Meeting AU - Miller, Quin R AU - Schaef, Todd AU - Thompson, Chris AU - Loring, John S AU - Windisch, Charles F AU - Bowden, Mark E AU - Arey, Bruce W AU - McGrail, Pete AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract H23A EP - 1323 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1629941443?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Silicate+carbonation+processes+in+water-bearing+supercritical+CO2+fluids%3B+implications+for+geologic+carbon+sequestration&rft.au=Miller%2C+Quin+R%3BSchaef%2C+Todd%3BThompson%2C+Chris%3BLoring%2C+John+S%3BWindisch%2C+Charles+F%3BBowden%2C+Mark+E%3BArey%2C+Bruce+W%3BMcGrail%2C+Pete%3BAnonymous&rft.aulast=Miller&rft.aufirst=Quin&rft.date=2012-12-01&rft.volume=2012&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ L2 - http://abstractsearch.agu.org/meetings/2012/FM/sections/H/sessions/H23A/abstracts/H23A-1323.html LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-12-04 N1 - CODEN - #07548 ER - TY - JOUR T1 - Investigation of Wyoming bentonite hydration in dry to water-saturated supercritical CO (sub 2) ; implications for caprock integrity AN - 1629941150; 2014-098220 AB - The effectiveness of geologic sequestration as an enterprise for CO2 storage depends partly on the reactivity of supercritical CO2 (scCO2) with caprock minerals. Injection of scCO2 will displace formation water, and the pore space adjacent to overlying caprocks could eventually be dominated by dry to water-saturated scCO2. Caprock formations have high concentrations of clay minerals, including expandable montmorillonites. Water-bearing scCO2 is highly reactive and capable of hydrating or dehydrating clays, possibly leading to porosity and permeability changes that directly impact caprock performance. Dehydration will cause montmorillonite clay minerals in caprocks to contract, thereby decreasing solid volume and possibly increasing caprock permeability and porosity. On the other hand, water intercalation will cause these clays to expand, thereby increasing solid volume and possibly leading to self-sealing of caprock fractures. Pacific Northwest National Laboratory's Carbon Sequestration Initiative is developing capabilities for studying wet scCO2-mineral reactions in situ. Here, we introduce novel in situ infrared (IR) spectroscopic instrumentation that enables quantitative titrations of reactant minerals with water in scCO2. Results are presented for the infrared spectroscopic titrations of Na-, Ca-, and Mg-saturated Wyoming bentonites with water over concentrations ranging from zero to scCO2 saturated. These experiments were carried out at 50 degrees C and 90 bar. Transmission IR spectroscopy was used to measure concentrations of water dissolved in the scCO2 or intercalated into the clays. The titration curves evaluated from the transmission-IR data are compared between the three types of clays to assess the effects of the cation on water partitioning. Single-reflection attenuated total reflection (ATR) IR spectroscopy was used to collect the spectrum of the clays as they hydrate at every total water concentration during the titration. Clay hydration is evidenced by increases in absorbance of the OH stretching and HOH bending modes of the intercalated waters. The ATR-IR data also indicate that CO2 is intercalated in the clay. The asymmetric stretching band of the CO2 molecules that are intercalated in the clay is narrower than that stretching band of bulk scCO2, which indicates that the spectral contribution from rotational fine structure is minimal and the intercalated CO2 is rotationally constrained. A chemometrics analysis of the complete set of ATR-IR spectra spanning the range of total water concentrations covered in the titration finds that there are at least two types of intercalated waters, two types of intercalated CO2 molecules, and the concentrations of these intercalated waters and CO2 molecules are correlated. These quantitative data, when coupled with in situ XRD results that predict interlayer spacing and clay volume, demonstrate that water and CO2 intercalation processes in expandable montmorillonite clays could lead to porosity and permeability changes that directly impact caprock performance. JF - American Geophysical Union Fall Meeting AU - Loring, John S AU - Chen, Jeffrey AU - Thompson, Chris AU - Schaef, Todd AU - Miller, Quin R AU - Martin, Paul F AU - Ilton, Eugene S AU - Qafoku, Odeta AU - Felmy, A R AU - Rosso, Kevin M AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract H23A EP - 1324 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1629941150?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Nuclear+Materials&rft.atitle=Phase-field+modeling+of+void+lattice+formation+under+irradiation&rft.au=Hu%2C+Shenyang%3BHenager%2C+Charles+H&rft.aulast=Hu&rft.aufirst=Shenyang&rft.date=2009-11-01&rft.volume=394&rft.issue=2-3&rft.spage=155&rft.isbn=&rft.btitle=&rft.title=Journal+of+Nuclear+Materials&rft.issn=00223115&rft_id=info:doi/10.1016%2Fj.jnucmat.2009.09.002 L2 - http://abstractsearch.agu.org/meetings/2012/FM/sections/H/sessions/H23A/abstracts/H23A-1324.html LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-12-04 N1 - CODEN - #07548 ER - TY - JOUR T1 - Hydrologic and geochemical data assimilation at the Hanford 300 Area AN - 1629940891; 2014-098335 AB - In modeling the uranium migration within the Integrated Field Research Challenge (IFRC) site at the Hanford 300 Area, uncertainties arise from both hydrologic and geochemical sources. The hydrologic uncertainty includes the transient flow boundary conditions induced by dynamic variations in Columbia River stage and the underlying heterogeneous hydraulic conductivity field, while the geochemical uncertainty is a result of limited knowledge of the geochemical reaction processes and parameters, as well as heterogeneity in uranium source terms. In this work, multiple types of data, including the results from constant-injection tests, borehole flowmeter profiling, and conservative tracer tests, are sequentially assimilated across scales within a Bayesian framework to reduce the hydrologic uncertainty. The hydrologic data assimilation is then followed by geochemical data assimilation, where the goal is to infer the heterogeneous distribution of uranium sources using uranium breakthrough curves from a desorption test that took place at high spring water table. We demonstrate in our study that Ensemble-based data assimilation techniques (Ensemble Kalman filter and smoother) are efficient in integrating multiple types of data sequentially for uncertainty reduction. The computational demand is managed by using the multi-realization capability within the parallel PFLOTRAN simulator. JF - American Geophysical Union Fall Meeting AU - Chen, X AU - Hammond, G E AU - Murray, C J AU - Zachara, J M AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract H31O EP - 07 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1629940891?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Hydrologic+and+geochemical+data+assimilation+at+the+Hanford+300+Area&rft.au=Chen%2C+X%3BHammond%2C+G+E%3BMurray%2C+C+J%3BZachara%2C+J+M%3BAnonymous&rft.aulast=Chen&rft.aufirst=X&rft.date=2012-12-01&rft.volume=2012&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-12-04 N1 - CODEN - #07548 ER - TY - JOUR T1 - Comparison of three levels of constitutive coupling for hydro-geomechanical evaluation of CO (sub 2) leakage to support risk assessment AN - 1629940398; 2014-095908 AB - Accurate assessment of the uncertainties and risks associated with potential leakage of CO (sub 2) , and effective design of injection, requires that coupled multifluid flow, energy transfer, mechanical, and geochemical processes are studied using numerical simulations. However, various levels of coupling may be used, which may have implications for the accuracy of the results and the simulation time requirements. Three different coupling approaches were used for modeling of CO (sub 2) sequestration to investigate leakage from a target aquifer through the caprock seal and the impact of each coupling approach on the solution. The impact of nonisothermal multifluid flow and rock deformation mechanics on CO (sub 2) migration and storage was evaluated through the caprock with and without a fault present. The three approaches for multifluid flow and mechanics coupling included 1) no coupling or no impact of mechanics on fluid flow (using the STOMP code); 2) intermediate coupling with approximate mechanics (using the STOMP code linked to an effective stress approximation using local pressure changes); 3) fully coupled fluid flow and mechanics (using the STOMP code sequentially coupled to the ABAQUS(Registered) finite element packages). For the full coupling, the poroelastic model that is implemented in ABAQUS(Registered) via user subroutines computes stiffness, stresses, and strains using aqueous and gas pressures and saturations from STOMP output and provides STOMP with the updated permeability, porosity, and capillary pressure as output from ABAQUS(Registered). The intermediate coupling routine used the same parameter updating scheme with an approximation of effective stress changes instead of using ABAQUS(Registered). These three levels of coupling of STOMP with ABAQUS(Registered) were compared to evaluate the impact of deformation during CO (sub 2) injection. The increases in permeability and porosity upon CO (sub 2) injection were larger with higher levels of coupling. We quantified the impact of constitutive coupling on variation in pore pressure and CO (sub 2) storage in the formation, as well as the impact on leakage from the formation. Investigation results and their implications for the applicability of coupled hydro-geomechanical modeling for quantification of CO (sub 2) sequestration/leakage risk criteria will be discussed. JF - American Geophysical Union Fall Meeting AU - Murray, C J AU - Carroll, K C AU - Nguyen, B N AU - Richmond, M C AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract H23D EP - 1392 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1629940398?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Comparison+of+three+levels+of+constitutive+coupling+for+hydro-geomechanical+evaluation+of+CO+%28sub+2%29+leakage+to+support+risk+assessment&rft.au=Murray%2C+C+J%3BCarroll%2C+K+C%3BNguyen%2C+B+N%3BRichmond%2C+M+C%3BAnonymous&rft.aulast=Murray&rft.aufirst=C&rft.date=2012-12-01&rft.volume=2012&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-12-04 N1 - CODEN - #07548 ER - TY - JOUR T1 - Initial characterization of carbon metabolism in iron oxidizing microbial communities of acidic hot springs in Norris Geyser Basin, Yellowstone National Park AN - 1623258758; 2014-087748 AB - Norris Geyser Basin in Yellowstone National Park is home to several acidic, sulfidic hot springs. Visual inspection of the springs reveals distinct geochemical regions starting with a sulfur deposition zone followed by a transition to iron oxide deposition downstream. The microbial communities in the iron oxidation zones are dominated by Archaea, including several members that appear to define previously unrecognized taxa. Abiotic iron oxidation rates are very slow at these temperatures (typically approximately 65-70 degrees C) and pH's (typically approximately 3). Therefore, the relatively rapid iron oxide deposition rate strongly suggests the process is microbially mediated, and an organism previously isolated from these springs, Metallosphaera yellowstonensis, has been shown to oxide iron in culture. M. yellowstonensis has been observed in the all microbial communities analyzed in the iron oxidizing zones of these springs, though metagenomic profiling suggests it constitutes only approximately 20% of the community membership. When we began our studies of C flow in the iron-oxidizing community, no C source had been demonstrated. Observed potential carbon sources in the springs include dissolved inorganic carbon, dissolved organic carbon, and methane, as well as random inputs of heterotrophic carbon in the forms of insect carcasses, pine needles, and animal scat. The temperatures in the iron oxidation zones are above the photosynthetic upper temperature limit, thus precluding photosynthetic-based autotrophy within the community itself. We are employing geochemical and stable isotope techniques to assess carbon inventories in the system. We have demonstrated that M. yellowstonensis as well as excised samples of iron oxide mat communities can fix CO2, and our estimated isotopic fractionation factor is consistent with the 3-hydroxypropionate 4-hydroxybutyrate pathway. Genes of this pathway have been identified in the M. yellowstonensis genome. We have tentatively identified small amounts of organic compounds the organism produces during autotrophic growth, and are conducting isotopic labeling experiments to determine if these compounds serve as substrates for the iron oxide mat communities. However, isotopic analysis of DIC in the springs as well as bulk iron oxide mat definitively show that fixation of DIC by M. yellowstonensis is not the only source of C within the mats. Metagenome analysis of the microbial communities and genome analysis of isolates suggest the presence of heterotrophic metabolic pathways. Indeed, initial labeling experiments demonstrate strong heterotrophic metabolism in the iron oxide mats as well as in M. yellowstonensis. Several potential sources of reduced C are available in the springs, but whether any of these potential substrates actually feed the iron mat communities is yet to be determined. Carbon isotope ratios of the bulk iron mat communities and potential heterotrophic C sources suggest that heterotrophic uptake of these sources, like autotrophy of DIC, is not the only source of C in the system. Identifying the major active carbon pools and potential geochemical and microbial carbon links will illuminate carbon cycling in this system and should provide insights into how energy is transferred from key chemolithotrophic reactions to other components of the microbial system. JF - American Geophysical Union Fall Meeting AU - Kreuzer, H W AU - Jennings, R D AU - Whitmore, L AU - Inskeep, W P AU - Moran, J AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract B51G EP - 0642 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1623258758?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Initial+characterization+of+carbon+metabolism+in+iron+oxidizing+microbial+communities+of+acidic+hot+springs+in+Norris+Geyser+Basin%2C+Yellowstone+National+Park&rft.au=Kreuzer%2C+H+W%3BJennings%2C+R+D%3BWhitmore%2C+L%3BInskeep%2C+W+P%3BMoran%2C+J%3BAnonymous&rft.aulast=Kreuzer&rft.aufirst=H&rft.date=2012-12-01&rft.volume=2012&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-11-13 N1 - CODEN - #07548 ER - TY - JOUR T1 - The distribution, diversity, and geobiology of Thermoproteales populations in Yellowstone National Park AN - 1623258403; 2014-087733 AB - The order Thermoproteales (phylum Crenarchaeota) consists of thermophilic, rod-shaped organisms that are found globally in geothermal habitats ranging in pH from approximately 3-9. Nearly all isolated Thermoproteales couple the respiration of inorganic sulfur species (e.g. elemental sulfur, thiosulfate, sulfate) to the oxidation of hydrogen or complex organic carbon. Prior 16S rRNA and metagenome analysis revealed four prominent Thermoproteales-like populations in hypoxic, sulfidic hot springs In Yellowstone National Park (YNP), WY, USA (Monarch Geyser [80 degrees C, pH 4], Cistern Spring [76 degrees C, pH 5] and Joseph's Coat Hot Spring [JCHS; 80 degrees C, pH 6]). The objectives of this study were to 1) characterize and compare the indigenous Thermoproteales-like de novo assemblies identified from metagenomic sequence data available for geothermal systems across YNP, 2) determine the metabolic potential of the Thermoproteales-like populations and evaluate their role in the geochemical cycling of organic and inorganic constituents, and 3) contrast both the sequenced genome and growth physiology of the first Thermoproteales isolated from YNP ("Pyrobaculum yellowstonensis" strain WP30), to the indigenous Thermoproteales-like de novo assemblies. Sequences related to either Caldivirga or Vulcanisaeta spp. (Type I Thermoproteales) were identified in both aerobic and anaerobic habitats ranging in pH approximately 3 - 6. Thermoproteus or Pyrobaculum spp. (Type-II Thermoproteales) were identified in anoxic habitats, but were constrained to pH values >4. Annotation of the de novo assemblies indicate that both Type-I and Type-II Thermoproteales populations are primarily heterotrophic, although key proteins of the autotrophic dicarboxylate/4-hydroxybutyrate cycle were also identified. Caldivirga/Vulcanisaeta-like populations appear to respire on elemental sulfur, sulfate, or molecular oxygen, while the Thermoproteus/Pyrobaculum-like population may also oxidize hydrogen and respire on elemental sulfur, thiosulfate, arsenate, or tetrathionate. One of the relevant Thermoproteales Type-II populations was isolated from JCHS and is an anaerobic heterotroph utilizing yeast extract as a carbon and energy source while respiring on elemental sulfur or arsenate, resulting in the production of sulfide or arsenite, respectively. The optimum growth temperature of strain WP30 (75 degrees C) and pH range (4.5 - 7) corresponds well with characteristics of the sulfidic sediment used as the original inoculum. A draft genome of strain WP30 reveals that respiration may involve as many as four dimethylsulfoxide molybdopterin oxidoreductases including a putative sulfur reductase and an arsenate reductase. Sequences with high amino acid identity to these reductases were also identified in metagenome data sets from sites containing Type-II populations. Expression data of these terminal reductase genes during the growth of strain WP30 on either sulfur or arsenate were compared to expression results from field sites. These data provide insights regarding the diversity, distribution, and potential role of Thermoproteales-like populations in high-temperature environments of YNP. JF - American Geophysical Union Fall Meeting AU - Jay, Z AU - Beam, J AU - Bailey, C AU - Dohnalkova, A AU - Planer-Friedrich, B AU - Romine, M AU - Inskeep, W P AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract B51D EP - 0585 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1623258403?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=The+distribution%2C+diversity%2C+and+geobiology+of+Thermoproteales+populations+in+Yellowstone+National+Park&rft.au=Jay%2C+Z%3BBeam%2C+J%3BBailey%2C+C%3BDohnalkova%2C+A%3BPlaner-Friedrich%2C+B%3BRomine%2C+M%3BInskeep%2C+W+P%3BAnonymous&rft.aulast=Jay&rft.aufirst=Z&rft.date=2012-12-01&rft.volume=2012&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-11-13 N1 - CODEN - #07548 ER - TY - JOUR T1 - Keep your sox on; community genomics-directed isolation and microscopic characterization of the dominant subsurface sulfur-oxidizing bacterium in a sediment aquifer AN - 1623258354; 2014-087721 AB - Community genomics and proteomics (proteogenomics) can be used to predict the metabolic potential of complex microbial communities and provide insight into microbial activity and nutrient cycling in situ. Inferences regarding the physiology of specific organisms then can guide isolation efforts, which, if successful, can yield strains that can be metabolically and structurally characterized to further test metagenomic predictions. Here we used proteogenomic data from an acetate-stimulated, sulfidic sediment column deployed in a groundwater well in Rifle, CO to direct laboratory amendment experiments to isolate a bacterial strain potentially involved in sulfur oxidation for physiological and microscopic characterization (Handley et al, submitted 2012). Field strains of Sulfurovum (genome r9c2) were predicted to be capable of CO2 fixation via the reverse TCA cycle and sulfur oxidation (Sox and SQR) coupled to either nitrate reduction (Nap, Nir, Nos) in anaerobic environments or oxygen reduction in microaerobic (cbb3 and bd oxidases) environments; however, key genes for sulfur oxidation (soxXAB) were not identified. Sulfidic groundwater and sediment from the Rifle site were used to inoculate cultures that contained various sulfur species, with and without nitrate and oxygen. We isolated a bacterium, Sulfurovum sp. OBA, whose 16S rRNA gene shares 99.8 % identity to the gene of the dominant genomically characterized strain (genome r9c2) in the Rifle sediment column. The 16S rRNA gene of the isolate most closely matches (95 % sequence identity) the gene of Sulfurovum sp. NBC37-1, a genome-sequenced deep-sea sulfur oxidizer. Strain OBA grew via polysulfide, colloidal sulfur, and tetrathionate oxidation coupled to nitrate reduction under autotrophic and mixotrophic conditions. Strain OBA also grew heterotrophically, oxidizing glucose, fructose, mannose, and maltose with nitrate as an electron acceptor. Over the range of oxygen concentrations tested, strain OBA was not capable of aerobic growth, but it could tolerate low oxygen conditions in the polysulfide/nitrate growth medium, suggesting that oxidases identified by genomics may play a role in detoxification rather than energy generation. Cryo-TEM imaging showed that strain OBA cells are rod-shaped and approximately 0.4 wide and 1.0 mu m in length, and confirmed metagenomics-based predictions of a Gram-negative cell envelope, pili and polyphosphate body production. Our results show the value of integrating metagenomics, culturing, and microscopic imaging to discern the physiology of bacteria involved in biogeochemical transformations in the subsurface. JF - American Geophysical Union Fall Meeting AU - Mullin, S W AU - Wrighton, K C AU - Luef, B AU - Wilkins, M J AU - Handley, K M AU - Williams, K H AU - Banfield, J F AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract B51A EP - 0489 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1623258354?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Expert+opinion+on+drug+delivery&rft.atitle=Nanoparticles+for+biomedical+imaging.&rft.au=Nune%2C+Satish+K%3BGunda%2C+Padmaja%3BThallapally%2C+Praveen+K%3BLin%2C+Ying-Ying%3BForrest%2C+M+Laird%3BBerkland%2C+Cory+J&rft.aulast=Nune&rft.aufirst=Satish&rft.date=2009-11-01&rft.volume=6&rft.issue=11&rft.spage=1175&rft.isbn=&rft.btitle=&rft.title=Expert+opinion+on+drug+delivery&rft.issn=1744-7593&rft_id=info:doi/10.1517%2F17425240903229031 LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-11-13 N1 - CODEN - #07548 ER - TY - JOUR T1 - CO (sub 2) -stimulated methanogenesis and its impact on metal release from sulfide minerals AN - 1618134625; 2014-083709 AB - Understanding the fate, behavior, and environmental impact of CO2 in the subsurface is becoming increasingly significant because of direct implications for the acceptance/safety of subsurface global warming mitigation strategies (e.g., geologic carbon sequestration). We initiated a series of experiments to better understand how different microbial populations and microbially-mediated processes will influence CO2 dynamics in the subsurface and subsequently, the release of metals and/or contaminants from sediments. In this presentation, we will focus primarily on the microbially-mediated transformation of CO2 to CH4 (by autotrophic methanogens) and its impact on the release of Fe, Pb and Fe/As from pyrite, galena and arsenopyrite respectively. Our findings indicated that in the presence of a viable methanogenic microbial population (and methanogenic conditions) elevated CO2 concentrations in the subsurface could stimulate methanogenesis, resulting in up to 95% conversion of CO2 to CH4. This conversion was accompanied by: 1) an incresase in solution pH; 2) a sequestering of Fe from pyrite and arsenopyrite; 3) a release of As from arsenopyrite; and 4) no apparent effect on Pb release from galena. In addition to providing new data, such findings also provide key insights as to how CO2 migration from geologic storage may impact metal geochemistry in the subsurface. Details on the mechanisms accounting for the difference in behavior between Fe, As and Pb will also be discussed. JF - American Geophysical Union Fall Meeting AU - Harvey, O R AU - Qafoku, N P AU - Wilkins, M J AU - Cantrell, K J AU - Brown, C F AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract B43B EP - 0395 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1618134625?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=CO+%28sub+2%29+-stimulated+methanogenesis+and+its+impact+on+metal+release+from+sulfide+minerals&rft.au=Harvey%2C+O+R%3BQafoku%2C+N+P%3BWilkins%2C+M+J%3BCantrell%2C+K+J%3BBrown%2C+C+F%3BAnonymous&rft.aulast=Harvey&rft.aufirst=O&rft.date=2012-12-01&rft.volume=2012&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-10-30 N1 - CODEN - #07548 ER - TY - JOUR T1 - A virtual soil system to study macroscopic manifestation of pore-scale biogeochemical processes AN - 1618133014; 2014-083666 AB - Mechanistic soil biogeochemical processes occur at the pore-scale that fundamentally control the moisture and CO2 fluxes at the soil and atmosphere interface. This presentation will present an on-going research to investigate pore-scale moisture migration and biogeochemical processes of organic carbon degradation, and their macroscopic manifestation in soils. Soil cores collected from Rattlesnake Mountain in southeastern Washington, USA, where a field experiment was conducted to investigate dynamic response of soil biogeochemistry to changing climate conditions, were used as an example for this study. The cores were examined using computerized x-ray tomography (XCT) to determine soil pore structures. The XCT imaging, together with various measurements of soil properties such as porosity, moisture content, organic carbon, biochemistry, etc are used to establish a virtual soil core with a high spatial resolution ( nearly equal 20um). The virtual soil system is then used to simulate soil moisture migration and organic carbon degradation, to identify important physical and biogeochemical factors controlling macroscopic moisture and CO2 fluxes in response to changing climate conditions, and to develop and evaluate pragmatic biogeochemical process models for larger scale applications. Core-scale measurements of CO2 flux and moisture change are used for development and validation of the process models. JF - American Geophysical Union Fall Meeting AU - Liu, C AU - Fang, Y AU - Shang, J AU - Bailey, V L AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract B41C EP - 0305 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 25:Soils UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1618133014?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Environmental+science+%26+technology&rft.atitle=Inhibition+effect+of+secondary+phosphate+mineral+precipitation+on+uranium+release+from+contaminated+sediments.&rft.au=Shi%2C+Zhenqing%3BLiu%2C+Chongxuan%3BZachara%2C+John+M%3BWang%2C+Zheming%3BDeng%2C+Baolin&rft.aulast=Shi&rft.aufirst=Zhenqing&rft.date=2009-11-01&rft.volume=43&rft.issue=21&rft.spage=8344&rft.isbn=&rft.btitle=&rft.title=Environmental+science+%26+technology&rft.issn=0013936X&rft_id=info:doi/10.1021%2Fes9021359 LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-10-30 N1 - CODEN - #07548 ER - TY - JOUR T1 - Characterizing seasonal and spatial distribution of East Asian dust; budget and radiative forcing AN - 1566815484; 2014-077756 AB - Mineral dust in the atmosphere has the potential to affect the global climate by interacting with radiation and influencing cloud properties. In this study, the Weather Research and Forecasting model with chemistry (WRF-Chem) is used to investigate the budget and radiative forcing (shortwave and longwave) of mineral dust over East Asia, and their seasonal and annual variations upon multi-year simulations. The model well captures the seasonal and spatial distributions of mineral dust compared with multi-satellite and ground-based measurements. A budget analysis of the physical processes (emission, transport, and deposition) is conducted to investigate the dust lifecycle and demonstrate the determining factors for seasonal and spatial variations over three sub-regions of East Asia (the source region, East China and the ocean outflow region). The dust radiative forcing of both shortwave and longwave in the atmosphere and at the top of atmosphere (TOA) and the surface are estimated with the online-diagnosis capability of WRF-Chem. This study implies the impact of mineral dust on regional climate of East Asia. JF - American Geophysical Union Fall Meeting AU - Chen, Siyou AU - Zhao, Chun AU - Qian, Yun AU - Leung, L AU - Huang, J AU - Anonymous Y1 - 2012/12// PY - 2012 DA - December 2012 SP - Abstract A44A EP - 07 PB - American Geophysical Union, Washington, DC VL - 2012 KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1566815484?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Geophysical+Union+Fall+Meeting&rft.atitle=Characterizing+seasonal+and+spatial+distribution+of+East+Asian+dust%3B+budget+and+radiative+forcing&rft.au=Chen%2C+Siyou%3BZhao%2C+Chun%3BQian%2C+Yun%3BLeung%2C+L%3BHuang%2C+J%3BAnonymous&rft.aulast=Chen&rft.aufirst=Siyou&rft.date=2012-12-01&rft.volume=2012&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=American+Geophysical+Union+Fall+Meeting&rft.issn=&rft_id=info:doi/10.1016%2Fj.advwatres.2009.08.012 LA - English DB - GeoRef N1 - Conference title - American Geophysical Union 2012 fall meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States N1 - Date revised - 2014-01-01 N1 - PubXState - DC N1 - Last updated - 2014-10-02 N1 - CODEN - #07548 ER - TY - JOUR T1 - Advanced intermediate-temperature Na-S battery AN - 1560117935; 20516531 AB - In this study, we reported an intermediate-temperature ( similar to 150 degree C) sodium-sulfur (Na-S) battery. With a relatively low operating temperature, this novel battery could reduce the cost and safety issues associated with the conventional high-temperature (300-350 degree C) Na-S battery. A dense beta ''-Al sub(2)O sub(3) solid membrane and tetraglyme were utilized as the electrolyte separator and catholyte solvent in this battery. Solubility tests indicated that a cathode mixture of Na sub(2)S sub(4) and S exhibited extremely high solubility in tetraglyme (e.g., >4.1 M for Na sub(2)S sub(4) + 4 S). CV scans of Na sub(2)S sub(4) in tetraglyme revealed two pairs of redox couples with peaks at around 2.22 and 1.75 V, corresponding to the redox reactions of polysulfide species. The discharge/charge profiles of the Na-S battery showed a slope region and a plateau, indicating multiple steps and cell reactions. In situ Raman measurements during battery operation suggested that polysulfide species were formed in the sequence of Na sub(2)S sub(5) + S arrow right Na sub(2)S sub(5) + Na sub(2)S sub(4) arrow right Na sub(2)S sub(4) + Na sub(2)S sub(2) during discharge and in a reverse order during charge. This battery showed dramatic improvement in rate capacity and cycling stability over room-temperature Na-S batteries, which makes it more attractive for renewable energy integration and other grid related applications. JF - Energy & Environmental Science AU - Lu, Xiaochuan AU - Kirby, Brent W AU - Xu, Wu AU - Li, Guosheng AU - Kim, Jin Y AU - Lemmon, John P AU - Sprenkle, Vincent L AU - Yang, Zhenguo AD - Energy and Environment Directorate; Pacific Northwest National Laboratory; Richland; WA 99354; USA; +1 509 375 2186; +1 509 372 4894; +1 509 375 2225; , Xiaochuan.Lu@pnnl.gov Y1 - 2012/12// PY - 2012 DA - Dec 2012 SP - 299 EP - 306 PB - Royal Society of Chemistry, c/o Springer-Verlag New York Inc. Secaucus New Jersey 07096 2485 United States VL - 6 IS - 1 SN - 1754-5692, 1754-5692 KW - Sustainability Science Abstracts; Environment Abstracts KW - Electrolytes KW - Membranes KW - Batteries KW - Energy KW - Renewable energy KW - Safety KW - Temperature KW - Solvents KW - ENA 03:Energy KW - M3 1010:Issues in Sustainable Development UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1560117935?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Assamodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Energy+%26+Environmental+Science&rft.atitle=Advanced+intermediate-temperature+Na-S+battery&rft.au=Lu%2C+Xiaochuan%3BKirby%2C+Brent+W%3BXu%2C+Wu%3BLi%2C+Guosheng%3BKim%2C+Jin+Y%3BLemmon%2C+John+P%3BSprenkle%2C+Vincent+L%3BYang%2C+Zhenguo&rft.aulast=Lu&rft.aufirst=Xiaochuan&rft.date=2012-12-01&rft.volume=6&rft.issue=1&rft.spage=299&rft.isbn=&rft.btitle=&rft.title=Energy+%26+Environmental+Science&rft.issn=17545692&rft_id=info:doi/10.1039%2Fc2ee23606k LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-09-01 N1 - Number of references - 28 N1 - Last updated - 2015-08-05 N1 - SubjectsTermNotLitGenreText - Electrolytes; Membranes; Batteries; Renewable energy; Energy; Safety; Solvents; Temperature DO - http://dx.doi.org/10.1039/c2ee23606k ER - TY - JOUR T1 - An electron paramagnetic resonance spectroscopy investigation of the retention mechanisms of Mn and Cu in the nanopore channels of three zeolite minerals AN - 1287377956; 2013-018364 AB - The adsorption mechanisms of divalent cations in zeolite nanopore channels can vary as a function of their pore dimensions. The nanopore inner-sphere enhancement (NISE) theory predicts that ions may dehydrate inside small nanopore channels in order to adsorb more closely to the mineral surface if the nanopore channel is sufficiently small. The results of an electron paramagnetic resonance (EPR) spectroscopy study of Mn and Cu adsorption on the zeolite minerals zeolite Y (large nanopores), ZSM-5 (intermediate nanopores), and mordenite (small nanopores) are presented. The Cu and Mn cations both adsorbed via an outer-sphere mechanism on zeolite Y based on the similarity between the adsorbed spectra and the aqueous spectra. Conversely, Mn and Cu adsorbed via an inner-sphere mechanism on mordenite based on spectrum asymmetry and peak broadening of the adsorbed spectra. However, Mn adsorbed via an outer-sphere mechanism on ZSM-5, whereas Cu adsorbed on ZSM-5 shows a high degree of surface interaction that indicates that it is adsorbed closer to the mineral surface. Evidence of dehydration and immobility was more readily evident in the spectrum of mordenite than in that of ZSM-5, indicating that Cu was not as close to the surface on ZSM-5 as it was when adsorbed on mordenite. Divalent Mn cations are strongly hydrated and are held strongly only in zeolites with small nanopore channels. Divalent Cu cations are also strongly hydrated, but can dehydrate more easily, presumably due to the Jahn-Teller effect, and are held strongly in zeolites with medium-sized nanopore channels or smaller. JF - Clays and Clay Minerals AU - Ferreira, Daniel R AU - Schulthess, Cristian P AU - Amonette, James E AU - Walter, Eric D Y1 - 2012/12// PY - 2012 DA - December 2012 SP - 588 EP - 598 PB - Clay Minerals Society, Chantilly, VA VL - 60 IS - 6 SN - 0009-8604, 0009-8604 KW - silicates KW - experimental studies KW - copper KW - clay mineralogy KW - adsorption KW - manganese KW - metals KW - chemical properties KW - zeolite group KW - cations KW - mordenite KW - framework silicates KW - spectra KW - dehydration KW - geochemistry KW - EPR spectra KW - 06A:Sedimentary petrology KW - 02C:Geochemistry of rocks, soils, and sediments UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1287377956?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Clays+and+Clay+Minerals&rft.atitle=An+electron+paramagnetic+resonance+spectroscopy+investigation+of+the+retention+mechanisms+of+Mn+and+Cu+in+the+nanopore+channels+of+three+zeolite+minerals&rft.au=Ferreira%2C+Daniel+R%3BSchulthess%2C+Cristian+P%3BAmonette%2C+James+E%3BWalter%2C+Eric+D&rft.aulast=Ferreira&rft.aufirst=Daniel&rft.date=2012-12-01&rft.volume=60&rft.issue=6&rft.spage=588&rft.isbn=&rft.btitle=&rft.title=Clays+and+Clay+Minerals&rft.issn=00098604&rft_id=info:doi/10.1346%2FCCMN.2012.0600604 L2 - http://www.ingentaconnect.com/content/cms/ccm LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2013, American Geosciences Institute. Abstract, Copyright, Clay Minerals Society | Reference includes data from GeoScienceWorld, Alexandria, VA, United States N1 - Date revised - 2013-01-01 N1 - Number of references - 20 N1 - PubXState - VA N1 - Document feature - illus. incl. 3 tables N1 - Last updated - 2013-02-14 N1 - CODEN - CLCMAB N1 - SubjectsTermNotLitGenreText - adsorption; cations; chemical properties; clay mineralogy; copper; dehydration; EPR spectra; experimental studies; framework silicates; geochemistry; manganese; metals; mordenite; silicates; spectra; zeolite group DO - http://dx.doi.org/10.1346/CCMN.2012.0600604 ER - TY - JOUR T1 - A method for directly correlating site-specific cross-sectional and plan-view transmission electron microscopy of individual nanostructures. AN - 1273272450; 23146147 AB - A sample preparation method is described for enabling direct correlation of site-specific plan-view and cross-sectional transmission electron microscopy (TEM) analysis of individual nanostructures by employing a dual-beam focused-ion beam (FIB) microscope. This technique is demonstrated using Si nanowires dispersed on a TEM sample support (lacey carbon or Si-nitride). Individual nanowires are first imaged in the plan-view orientation to identify a region of interest; in this case, impurity atoms distributed at crystalline defects that require further investigation in the cross-sectional orientation. Subsequently, the region of interest is capped with a series of ex situ and in situ deposited layers to protect the nanowire and facilitate site-specific lift-out and cross-sectioning using a dual-beam FIB microscope. The lift-out specimen is thinned to electron transparency with site-specific positioning to within ≈ 200 nm of a target position along the length of the nanowire. Using the described technique, it is possible to produce correlated plan-view and cross-sectional view lattice-resolved TEM images that enable a quasi-3D analysis of crystalline defect structures in a specific nanowire. While the current study is focused on nanowires, the procedure described herein is general for any electron-transparent sample and is broadly applicable for many nanostructures, such as nanowires, nanoparticles, patterned thin films, and devices. JF - Microscopy and microanalysis : the official journal of Microscopy Society of America, Microbeam Analysis Society, Microscopical Society of Canada AU - Schreiber, Daniel K AU - Adusumilli, Praneet AU - Hemesath, Eric R AU - Seidman, David N AU - Petford-Long, Amanda K AU - Lauhon, Lincoln J AD - Department of Materials Science and Engineering, Northwestern University, Evanston, IL 60208-3108, USA. daniel.schreiber@pnnl.gov Y1 - 2012/12// PY - 2012 DA - December 2012 SP - 1410 EP - 1418 VL - 18 IS - 6 UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1273272450?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Microscopy+and+microanalysis+%3A+the+official+journal+of+Microscopy+Society+of+America%2C+Microbeam+Analysis+Society%2C+Microscopical+Society+of+Canada&rft.atitle=A+method+for+directly+correlating+site-specific+cross-sectional+and+plan-view+transmission+electron+microscopy+of+individual+nanostructures.&rft.au=Schreiber%2C+Daniel+K%3BAdusumilli%2C+Praneet%3BHemesath%2C+Eric+R%3BSeidman%2C+David+N%3BPetford-Long%2C+Amanda+K%3BLauhon%2C+Lincoln+J&rft.aulast=Schreiber&rft.aufirst=Daniel&rft.date=2012-12-01&rft.volume=18&rft.issue=6&rft.spage=1410&rft.isbn=&rft.btitle=&rft.title=Microscopy+and+microanalysis+%3A+the+official+journal+of+Microscopy+Society+of+America%2C+Microbeam+Analysis+Society%2C+Microscopical+Society+of+Canada&rft.issn=1435-8115&rft_id=info:doi/10.1017%2FS1431927612013517 LA - English DB - ProQuest Environmental Science Collection N1 - Date completed - 2013-06-06 N1 - Date created - 2012-12-20 N1 - Date revised - 2017-02-17 N1 - Last updated - 2017-02-22 DO - http://dx.doi.org/10.1017/S1431927612013517 ER - TY - JOUR T1 - Laboratory studies on surface sampling of Bacillus anthracis contamination: summary, gaps and recommendations AN - 1257747501; 17423138 AB - This article summarizes previous laboratory studies to characterize the performance of methods for collecting, storing/transporting, processing and analysing samples from surfaces contaminated by Bacillus anthracis or related surrogates. The focus is on plate culture and count estimates of surface contamination for swab, wipe and vacuum samples of porous and nonporous surfaces. Summaries of the previous studies and their results were assessed to identify gaps in information needed as inputs to calculate key parameters critical to risk management in biothreat incidents. One key parameter is the number of samples needed to make characterization or clearance decisions with specified statistical confidence. Other key parameters include the ability to calculate, following contamination incidents, the (i) estimates of B. anthracis contamination, as well as the bias and uncertainties in the estimates and (ii) confidence in characterization and clearance decisions for contaminated or decontaminated buildings. Gaps in knowledge and understanding identified during the summary of the studies are discussed. Additional work is needed to quantify (i) the false-negative rates of surface-sampling methods with lower concentrations on various surfaces and (ii) the effects on performance characteristics of: aerosol vs liquid deposition of spores, using surrogates instead of B. anthracis, real-world vs laboratory conditions and storage and transportation conditions. Recommendations are given for future evaluations of data from existing studies and possible new studies. JF - Journal of Applied Microbiology AU - Piepel, G F AU - Amidan, B G AU - Hu, R AD - Pacific Northwest National Laboratory Y1 - 2012/12// PY - 2012 DA - December 2012 SP - 1287 EP - 1304 PB - Wiley-Blackwell, 111 River Street Hoboken NJ 07030-5774 United States VL - 113 IS - 6 SN - 1364-5072, 1364-5072 KW - Microbiology Abstracts B: Bacteriology; Microbiology Abstracts A: Industrial & Applied Microbiology KW - Aerosols KW - Data processing KW - Statistics KW - Contamination KW - Vacuum KW - Sampling KW - Bacillus anthracis KW - Spores KW - J 02320:Cell Biology KW - A 01300:Methods UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1257747501?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Amicrobiologyb&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Applied+Microbiology&rft.atitle=Laboratory+studies+on+surface+sampling+of+Bacillus+anthracis+contamination%3A+summary%2C+gaps+and+recommendations&rft.au=Piepel%2C+G+F%3BAmidan%2C+B+G%3BHu%2C+R&rft.aulast=Piepel&rft.aufirst=G&rft.date=2012-12-01&rft.volume=113&rft.issue=6&rft.spage=1287&rft.isbn=&rft.btitle=&rft.title=Journal+of+Applied+Microbiology&rft.issn=13645072&rft_id=info:doi/10.1111%2Fj.1365-2672.2012.05381.x LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2012-12-01 N1 - Last updated - 2016-03-30 N1 - SubjectsTermNotLitGenreText - Aerosols; Statistics; Data processing; Contamination; Vacuum; Sampling; Spores; Bacillus anthracis DO - http://dx.doi.org/10.1111/j.1365-2672.2012.05381.x ER - TY - JOUR T1 - An approach for calculating a confidence interval from a single aquatic sample for monitoring hydrophobic organic contaminants. AN - 1179490014; 22997050 AB - The use of passive sampling devices (PSDs) for monitoring hydrophobic organic contaminants in aquatic environments can entail logistical constraints that often limit a comprehensive statistical sampling plan, thus resulting in a restricted number of samples. The present study demonstrates an approach for using the results of a pilot study designed to estimate sampling variability, which in turn can be used as variance estimates for confidence intervals for future n = 1 PSD samples of the same aquatic system. Sets of three to five PSDs were deployed in the Portland Harbor Superfund site for three sampling periods over the course of two years. The PSD filters were extracted and, as a composite sample, analyzed for 33 polycyclic aromatic hydrocarbon compounds. The between-sample and within-sample variances were calculated to characterize sources of variability in the environment and sampling methodology. A method for calculating a statistically reliable and defensible confidence interval for the mean of a single aquatic passive sampler observation (i.e., n = 1) using an estimate of sample variance derived from a pilot study is presented. Coverage probabilities are explored over a range of variance values using a Monte Carlo simulation. JF - Environmental toxicology and chemistry AU - Matzke, Melissa M AU - Allan, Sarah E AU - Anderson, Kim A AU - Waters, Katrina M AD - Computational Biology and Bioinformatics, Pacific Northwest National Laboratory, Richland, WA, USA. mmatzke@pnnl.gov Y1 - 2012/12// PY - 2012 DA - December 2012 SP - 2888 EP - 2892 VL - 31 IS - 12 KW - Polycyclic Aromatic Hydrocarbons KW - 0 KW - Water Pollutants, Chemical KW - Index Medicus KW - Hydrophobic and Hydrophilic Interactions KW - Confidence Intervals KW - Pilot Projects KW - Water Pollutants, Chemical -- chemistry KW - Water Pollutants, Chemical -- analysis KW - Polycyclic Aromatic Hydrocarbons -- analysis KW - Water Pollution, Chemical -- statistics & numerical data KW - Polycyclic Aromatic Hydrocarbons -- chemistry KW - Environmental Monitoring -- methods KW - Environmental Monitoring -- instrumentation UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1179490014?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Environmental+toxicology+and+chemistry&rft.atitle=Application+of+Phase-Field+Modeling+in+Microstructure+and+Property+Evolution+under+Irradiation&rft.au=Hu%2C+Shenyang%3BHenager%2C+Chuck&rft.aulast=Hu&rft.aufirst=Shenyang&rft.date=2009-10-25&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2009+Materials+Science+and+Technology+Conference+and+Exposition+%28MS%26T+2009%29&rft.issn=&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date completed - 2013-07-12 N1 - Date created - 2012-11-20 N1 - Date revised - 2017-02-17 N1 - SuppNotes - Cited By: Mar Environ Res. 2008 Dec;66(5):487-98 [18845332] Environ Sci Technol. 2008 Dec 15;42(24):9065-71 [19174872] Chemosphere. 2009 Jun;75(11):1446-52 [19289247] Environ Sci Technol. 2009 Jul 15;43(14):5383-90 [19708370] Chemosphere. 2004 Jul;56(3):237-46 [15172596] Environ Sci Technol. 2008 Jun 15;42(12):4486-93 [18605575] Environ Sci Technol. 2006 Jun 15;40(12):3689-95 [16830528] J Cell Biol. 2007 Apr 9;177(1):7-11 [17420288] Environ Sci Technol. 2007 Feb 15;41(4):1317-23 [17593736] J Chromatogr A. 2008 Mar 14;1184(1-2):234-53 [17719053] J Eval Clin Pract. 2004 May;10(2):307-12 [15189396] N1 - Last updated - 2017-02-22 DO - http://dx.doi.org/10.1002/etc.2014 ER - TY - JOUR T1 - Fayalite dissolution and siderite formation in water-saturated supercritical CO (sub 2) AN - 1473591563; 2013-004140 AB - Olivines, significant constituents of basaltic rocks, have the potential to immobilize permanently CO (sub 2) after it is injected in the deep subsurface, due to carbonation reactions occurring between CO (sub 2) and the host rock. To investigate the reactions of fayalitic olivine with supercritical CO (sub 2) (scCO (sub 2) ) and formation of mineral carbonates, experiments were conducted at temperatures of 35 degrees C to 80 degrees C, 90 atm pressure and anoxic conditions. For every temperature, the dissolution of fayalite was examined both in the presence of liquid water and H (sub 2) O-saturated scCO (sub 2) . The experiments were conducted in a high pressure batch reactor at reaction time extending up to 85 days. The newly formed products were characterized using a comprehensive suite of bulk and surface characterization techniques: X-ray diffraction, Transmission/Emission Mossbauer Spectroscopy, Scanning Electron Microscopy coupled with Focused Ion Beam, and High Resolution Transmission Electron Microscopy. Siderite with rhombohedral morphology was formed at 35 degrees C, 50 degrees C, and 80 degrees C in the presence of liquid water and scCO (sub 2) . In H (sub 2) O-saturated scCO (sub 2) , the formation of siderite was confirmed only at high temperature (80 degrees C). Characterization of reacted samples in H (sub 2) O-saturated scCO (sub 2) with high resolution TEM indicated that siderite formation initiated inside voids created during the initial steps of fayalite dissolution. Later stages of fayalite dissolution result in formation of siderite in layered vertical structures, columns or pyramids with a rhombus base morphology. Abstract Copyright (2012) Elsevier, B.V. JF - Chemical Geology AU - Qafoku, Odeta AU - Kovarik, Libor AU - Kukkadapu, Ravi K AU - Ilton, Eugene S AU - Arey, Bruce W AU - Tucek, Jiri AU - Felmy, Andrew R Y1 - 2012/11/25/ PY - 2012 DA - 2012 Nov 25 SP - 124 EP - 135 PB - Elsevier, Amsterdam VL - 332-333 SN - 0009-2541, 0009-2541 KW - silicates KW - experimental studies KW - X-ray diffraction data KW - olivine group KW - solubility KW - TEM data KW - electron probe data KW - carbon dioxide KW - nesosilicates KW - siderite KW - water-rock interaction KW - saturation KW - fayalite KW - orthosilicates KW - water content KW - spectra KW - crystal chemistry KW - chemical composition KW - carbonates KW - SEM data KW - P-T conditions KW - Mossbauer spectra KW - 01B:Mineralogy of silicates KW - 02A:General geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1473591563?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Chemical+Geology&rft.atitle=Fayalite+dissolution+and+siderite+formation+in+water-saturated+supercritical+CO+%28sub+2%29&rft.au=Qafoku%2C+Odeta%3BKovarik%2C+Libor%3BKukkadapu%2C+Ravi+K%3BIlton%2C+Eugene+S%3BArey%2C+Bruce+W%3BTucek%2C+Jiri%3BFelmy%2C+Andrew+R&rft.aulast=Qafoku&rft.aufirst=Odeta&rft.date=2012-11-25&rft.volume=332-333&rft.issue=&rft.spage=124&rft.isbn=&rft.btitle=&rft.title=Chemical+Geology&rft.issn=00092541&rft_id=info:doi/10.1016%2Fj.chemgeo.2012.09.028 L2 - http://www.sciencedirect.com/science/journal/00092541 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2013, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2013-01-01 N1 - Number of references - 72 N1 - Document feature - illus. incl. 1 table N1 - Last updated - 2014-01-02 N1 - CODEN - CHGEAD N1 - SubjectsTermNotLitGenreText - carbon dioxide; carbonates; chemical composition; crystal chemistry; electron probe data; experimental studies; fayalite; Mossbauer spectra; nesosilicates; olivine group; orthosilicates; P-T conditions; saturation; SEM data; siderite; silicates; solubility; spectra; TEM data; water content; water-rock interaction; X-ray diffraction data DO - http://dx.doi.org/10.1016/j.chemgeo.2012.09.028 ER - TY - JOUR T1 - Mineral dissolution and secondary precipitation on quartz sand in simulated Hanford tank solutions affecting subsurface porosity AN - 1282821545; 2013-013783 AB - Highly alkaline nuclear waste solutions have been released from underground nuclear waste storage tanks and pipelines into the vadose zone at the US Department of Energy's Hanford Site in Washington, causing mineral dissolution and re-precipitation upon contact with subsurface sediments. High pH caustic NaNO (sub 3) solutions with and without dissolved Al were reacted with quartz sand through flow-through columns stepwise at 45, 51, and 89 degrees C to simulate possible reactions between leaked nuclear waste solution and primary subsurface mineral. Upon reaction, Si was released from the dissolution of quartz sand, and nitrate-cancrinite [Na (sub 8) Si (sub 6) Al (sub 6) O (sub 24) (NO (sub 3) ) (sub 2) ] precipitated on the quartz surface as a secondary mineral phase. Both steady-state dissolution and precipitation kinetics were quantified, and quartz dissolution apparent activation energy was determined. Mineral alteration through dissolution and precipitation processes results in pore volume and structure changes in the subsurface porous media. In this study, the column porosity increased up to 40.3% in the pure dissolution column when no dissolved Al was present in the leachate, whereas up to a 26.5% porosity decrease was found in columns where both dissolution and precipitation were observed because of the presence of Al in the input solution. The porosity change was also confirmed by calculation using the dissolution and precipitation rates and mineral volume changes. Abstract Copyright (2012) Elsevier, B.V. JF - Journal of Hydrology AU - Wang, Guohui AU - Um, Wooyong Y1 - 2012/11/23/ PY - 2012 DA - 2012 Nov 23 SP - 159 EP - 168 PB - Elsevier, Amsterdam VL - 472-473 SN - 0022-1694, 0022-1694 KW - United States KW - silicates KW - alteration KW - geologic hazards KW - silica minerals KW - isotopes KW - waste water KW - underground storage tanks KW - unsaturated zone KW - simulation KW - environmental analysis KW - reservoir rocks KW - radioactive waste KW - ground water KW - activation energy KW - radioactive isotopes KW - mineral composition KW - chemical reactions KW - sediments KW - leachate KW - framework silicates KW - chemical composition KW - water pollution KW - kinetics KW - pH KW - soils KW - sand KW - leaking underground storage tanks KW - experimental studies KW - Washington KW - secondary minerals KW - clastic sediments KW - pollutants KW - pollution KW - Hanford Site KW - solubility KW - hydrochemistry KW - porosity KW - alkalic composition KW - soil pollution KW - precipitation KW - volume KW - natural hazards KW - quartz KW - reservoir properties KW - waste disposal KW - 02B:Hydrochemistry KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1282821545?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Hydrology&rft.atitle=Mineral+dissolution+and+secondary+precipitation+on+quartz+sand+in+simulated+Hanford+tank+solutions+affecting+subsurface+porosity&rft.au=Wang%2C+Guohui%3BUm%2C+Wooyong&rft.aulast=Wang&rft.aufirst=Guohui&rft.date=2012-11-23&rft.volume=472-473&rft.issue=&rft.spage=159&rft.isbn=&rft.btitle=&rft.title=Journal+of+Hydrology&rft.issn=00221694&rft_id=info:doi/10.1016%2Fj.jhydrol.2012.09.021 L2 - http://www.sciencedirect.com/science/journal/00221694 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2013, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2013-01-01 N1 - Number of references - 36 N1 - Document feature - illus. incl. 3 tables N1 - Last updated - 2013-02-05 N1 - CODEN - JHYDA7 N1 - SubjectsTermNotLitGenreText - activation energy; alkalic composition; alteration; chemical composition; chemical reactions; clastic sediments; environmental analysis; experimental studies; framework silicates; geologic hazards; ground water; Hanford Site; hydrochemistry; isotopes; kinetics; leachate; leaking underground storage tanks; mineral composition; natural hazards; pH; pollutants; pollution; porosity; precipitation; quartz; radioactive isotopes; radioactive waste; reservoir properties; reservoir rocks; sand; secondary minerals; sediments; silica minerals; silicates; simulation; soil pollution; soils; solubility; underground storage tanks; United States; unsaturated zone; volume; Washington; waste disposal; waste water; water pollution DO - http://dx.doi.org/10.1016/j.jhydrol.2012.09.021 ER - TY - JOUR T1 - Simultaneous and sensitive detection of six serotypes of botulinum neurotoxin using enzyme-linked immunosorbent assay-based protein antibody microarrays. AN - 1112344634; 22935296 AB - Botulinum neurotoxins (BoNTs), produced by Clostridium botulinum, are a group of seven (A-G) immunologically distinct proteins and cause the paralytic disease botulism. These toxins are the most poisonous substances known to humans and are potential bioweapon agents. Therefore, it is necessary to develop highly sensitive assays for the detection of BoNTs in both clinical and environmental samples. In the current study, we have developed an enzyme-linked immunosorbent assay (ELISA)-based protein antibody microarray for the sensitive and simultaneous detection of BoNT serotypes A, B, C, D, E, and F. With engineered high-affinity antibodies, the BoNT assays have sensitivities in buffer ranging from 1.3fM (0.2pg/ml) to 14.7fM (2.2pg/ml). Using clinical and food matrices (serum and milk), the microarray is capable of detecting BoNT serotypes A to F to similar levels as in standard buffer. Cross-reactivity between assays for individual serotype was also analyzed. These simultaneous, rapid, and sensitive assays have the potential to measure botulinum toxins in a high-throughput manner in complex clinical, food, and environmental samples. JF - Analytical biochemistry AU - Zhang, Yanfeng AU - Lou, Jianlong AU - Jenko, Kathy L AU - Marks, James D AU - Varnum, Susan M AD - Biological Sciences Division, Pacific Northwest National Laboratory, Richland, WA 99352, USA. Y1 - 2012/11/15/ PY - 2012 DA - 2012 Nov 15 SP - 185 EP - 192 VL - 430 IS - 2 KW - Antibodies KW - 0 KW - Botulinum Toxins KW - EC 3.4.24.69 KW - Index Medicus KW - High-Throughput Screening Assays KW - Antibodies -- immunology KW - Animals KW - Protein Engineering KW - Antibodies -- metabolism KW - Clostridium botulinum -- metabolism KW - Milk -- chemistry KW - Cross Reactions KW - Antibodies -- genetics KW - Protein Array Analysis KW - Botulinum Toxins -- analysis KW - Botulinum Toxins -- blood KW - Enzyme-Linked Immunosorbent Assay KW - Serotyping -- methods UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1112344634?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Analytical+biochemistry&rft.atitle=Simultaneous+and+sensitive+detection+of+six+serotypes+of+botulinum+neurotoxin+using+enzyme-linked+immunosorbent+assay-based+protein+antibody+microarrays.&rft.au=Zhang%2C+Yanfeng%3BLou%2C+Jianlong%3BJenko%2C+Kathy+L%3BMarks%2C+James+D%3BVarnum%2C+Susan+M&rft.aulast=Zhang&rft.aufirst=Yanfeng&rft.date=2012-11-15&rft.volume=430&rft.issue=2&rft.spage=185&rft.isbn=&rft.btitle=&rft.title=Analytical+biochemistry&rft.issn=1096-0309&rft_id=info:doi/10.1016%2Fj.ab.2012.08.021 LA - English DB - ProQuest Environmental Science Collection N1 - Date completed - 2013-02-26 N1 - Date created - 2012-10-15 N1 - Date revised - 2017-02-17 N1 - SuppNotes - Cited By: Protein Eng Des Sel. 2011 Mar;24(3):321-31 [21149386] BMC Bioinformatics. 2005;6:17 [15673468] Hybridoma (Larchmt). 2011 Jun;30(3):209-16 [21707354] Appl Environ Microbiol. 2011 Nov;77(21):7815-22 [21908624] Anal Biochem. 2012 Jun 1;425(1):28-35 [22406430] Equine Vet J. 1999 Nov;31(6):492-9 [10596931] J AOAC Int. 2001 Jan-Feb;84(1):85-8 [11234855] J AOAC Int. 2001 Sep-Oct;84(5):1460-4 [11601465] Proc Natl Acad Sci U S A. 2002 Aug 20;99(17):11346-50 [12177434] J Proteome Res. 2002 May-Jun;1(3):233-7 [12645900] Anal Bioanal Chem. 2004 Jan;378(1):68-75 [14615869] Methods Mol Biol. 2004;264:161-72 [15020788] J Chromatogr B Analyt Technol Biomed Life Sci. 2004 Sep 25;809(1):37-41 [15282091] J Clin Microbiol. 2004 Oct;42(10):4718-25 [15472332] Dis Markers. 2004;20(3):135-48 [15502246] Biochem Biophys Res Commun. 1972 Jul 11;48(1):108-12 [5041870] J Assoc Off Anal Chem. 1977 May;60(3):541-5 [323214] J Mol Biol. 2005 Aug 5;351(1):158-69 [16002090] ALTEX. 2005;22(3):185-95 [16186994] Appl Environ Microbiol. 2005 Dec;71(12):7897-903 [16332765] Expert Rev Proteomics. 2006 Feb;3(1):37-44 [16445349] Appl Environ Microbiol. 2006 Feb;72(2):1231-8 [16461671] Anal Biochem. 2006 Apr 1;351(1):84-92 [16500606] Anal Biochem. 2006 Jun 15;353(2):248-56 [16620745] Diagn Microbiol Infect Dis. 2006 Nov;56(3):225-32 [16839735] J Mol Biol. 2007 Jan 5;365(1):196-210 [17059824] Nat Biotechnol. 2007 Jan;25(1):107-16 [17173035] Vaccine. 2007 May 22;25(21):4273-82 [17395341] J Immunol Methods. 2008 Jan 1;329(1-2):92-101 [17976638] J Immunol Methods. 2008 Jan 31;330(1-2):120-9 [18093612] J Biol Chem. 2008 Feb 15;283(7):3997-4003 [18032388] PLoS One. 2008;3(4):e2041 [18446228] J Immunol Methods. 2008 Jul 20;336(1):1-8 [18452945] J Proteome Res. 2008 Jun;7(6):2406-14 [18422355] J Immunol Methods. 2009 Mar 31;343(1):21-7 [19176217] Anal Chem. 2009 Apr 1;81(7):2760-7 [19253949] Analyst. 2009 May;134(5):987-96 [19381395] PLoS One. 2009;4(4):e5355 [19399171] Anal Chem. 2009 Jul 15;81(14):5783-93 [19530657] Biosens Bioelectron. 2009 Sep 15;25(1):179-84 [19643593] Analyst. 2009 Oct;134(10):2028-39 [19768210] Vet Microbiol. 2010 Jan 6;140(1-2):147-54 [19720474] Protein Eng Des Sel. 2010 Apr;23(4):311-9 [20156888] Anal Chem. 2010 Apr 1;82(7):2916-24 [20199054] J Pharmacol Toxicol Methods. 2010 May-Jun;61(3):304-10 [20100585] PLoS One. 2010;5(6):e11047 [20548779] PLoS One. 2010;5(8):e12237 [20808925] Anal Biochem. 2011 Mar 15;410(2):281-8 [21134347] JAMA. 2001 Feb 28;285(8):1059-70 [11209178] Microbiol Rev. 1980 Sep;44(3):419-48 [6252433] Microbiol Rev. 1982 Mar;46(1):86-94 [6806598] Lancet. 1990 Dec 8;336(8728):1449-50 [1978909] Aust Vet J. 1991 Mar;68(3):111-3 [2043084] Nature. 1992 Oct 29;359(6398):832-5 [1331807] J Wildl Dis. 1993 Oct;29(4):533-9 [8258850] Adv Exp Med Biol. 1996;389:251-60 [8861019] Neurosci Lett. 1997 Mar 14;224(2):91-4 [9086464] Infect Immun. 1997 Sep;65(9):3743-52 [9284147] J Wildl Dis. 1998 Oct;34(4):744-51 [9813844] Appl Environ Microbiol. 1999 Sep;65(9):3787-92 [10473376] Science. 1959 Sep 25;130(3378):763-72 [14413547] Anal Biochem. 2011 Apr 15;411(2):200-9 [21216216] N1 - Last updated - 2017-02-22 DO - http://dx.doi.org/10.1016/j.ab.2012.08.021 ER - TY - CPAPER T1 - Evaluation of Pulse Jet Mixer Concentration Profiles to Track Slurry Suspension and Settling T2 - 2012 ASME International Mechanical Engineering Congress & Exposition AN - 1313099365; 6171524 JF - 2012 ASME International Mechanical Engineering Congress & Exposition AU - Bamberger, Judith Y1 - 2012/11/09/ PY - 2012 DA - 2012 Nov 09 KW - Slurries UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313099365?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2012+ASME+International+Mechanical+Engineering+Congress+%26+Exposition&rft.atitle=Evaluation+of+Pulse+Jet+Mixer+Concentration+Profiles+to+Track+Slurry+Suspension+and+Settling&rft.au=Bamberger%2C+Judith&rft.aulast=Bamberger&rft.aufirst=Judith&rft.date=2012-11-09&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+ASME+International+Mechanical+Engineering+Congress+%26+Exposition&rft.issn=&rft_id=info:doi/ L2 - http://www.asmeconferences.org/Congress2012/ConferenceSchedule.cfm LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - An Inverse Algorithm for Resonance Inspection T2 - 2012 ASME International Mechanical Engineering Congress & Exposition AN - 1313087139; 6171756 JF - 2012 ASME International Mechanical Engineering Congress & Exposition AU - Lai, Kevin AU - Xu, Wei AU - Sun, Xin Y1 - 2012/11/09/ PY - 2012 DA - 2012 Nov 09 KW - Inspection KW - Mathematical models KW - Resonance KW - Algorithms UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313087139?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2012+ASME+International+Mechanical+Engineering+Congress+%26+Exposition&rft.atitle=An+Inverse+Algorithm+for+Resonance+Inspection&rft.au=Lai%2C+Kevin%3BXu%2C+Wei%3BSun%2C+Xin&rft.aulast=Lai&rft.aufirst=Kevin&rft.date=2012-11-09&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+ASME+International+Mechanical+Engineering+Congress+%26+Exposition&rft.issn=&rft_id=info:doi/ L2 - http://www.asmeconferences.org/Congress2012/ConferenceSchedule.cfm LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Review of Dry and Wed-Dry Cooling Stiudies T2 - 2012 ASME International Mechanical Engineering Congress & Exposition AN - 1313080705; 6171865 JF - 2012 ASME International Mechanical Engineering Congress & Exposition AU - Bamberger, Judith Y1 - 2012/11/09/ PY - 2012 DA - 2012 Nov 09 KW - Reviews UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313080705?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2012+ASME+International+Mechanical+Engineering+Congress+%26+Exposition&rft.atitle=Review+of+Dry+and+Wed-Dry+Cooling+Stiudies&rft.au=Bamberger%2C+Judith&rft.aulast=Bamberger&rft.aufirst=Judith&rft.date=2012-11-09&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2009+Materials+Science+and+Technology+Conference+and+Exposition+%28MS%26T+2009%29&rft.issn=&rft_id=info:doi/ L2 - http://www.asmeconferences.org/Congress2012/ConferenceSchedule.cfm LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - A Smoothed Particle Hydrodynamics Model for Friction Stir Welding Process T2 - 2012 ASME International Mechanical Engineering Congress & Exposition AN - 1313027230; 6172187 JF - 2012 ASME International Mechanical Engineering Congress & Exposition AU - Pan, Wenxiao AU - Tartakovsky, Alexandre AU - Khaleel, Mohammad Y1 - 2012/11/09/ PY - 2012 DA - 2012 Nov 09 KW - Particulates KW - Welding KW - Hydrodynamics KW - Models UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313027230?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2012+ASME+International+Mechanical+Engineering+Congress+%26+Exposition&rft.atitle=A+Smoothed+Particle+Hydrodynamics+Model+for+Friction+Stir+Welding+Process&rft.au=Pan%2C+Wenxiao%3BTartakovsky%2C+Alexandre%3BKhaleel%2C+Mohammad&rft.aulast=Pan&rft.aufirst=Wenxiao&rft.date=2012-11-09&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+ASME+International+Mechanical+Engineering+Congress+%26+Exposition&rft.issn=&rft_id=info:doi/ L2 - http://www.asmeconferences.org/Congress2012/ConferenceSchedule.cfm LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Data Assimilation at the Hanford 300 Area T2 - 2012 Annual Meeting of the Geological Society of America AN - 1313039447; 6174627 JF - 2012 Annual Meeting of the Geological Society of America AU - Hammond, Glenn AU - Chen, Xingyuan Y1 - 2012/11/04/ PY - 2012 DA - 2012 Nov 04 KW - USA, Washington, Hanford KW - Data collection KW - Data processing UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313039447?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2012+Annual+Meeting+of+the+Geological+Society+of+America&rft.atitle=Data+Assimilation+at+the+Hanford+300+Area&rft.au=Hammond%2C+Glenn%3BChen%2C+Xingyuan&rft.aulast=Hammond&rft.aufirst=Glenn&rft.date=2012-11-04&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+Annual+Meeting+of+the+Geological+Society+of+America&rft.issn=&rft_id=info:doi/ L2 - https://gsa.confex.com/gsa/2012AM/webprogram/start.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - JOUR T1 - Evaluation of SDS depletion using an affinity spin column and IMS-MS detection AN - 1529907421; 19893069 AB - While the use of detergents is necessary for a variety of protein isolation preparation protocols, they are not compatible with mass spectral analysis due to ion suppression and adduct formation. This manuscript describes optimization of detergent removal, using commercially available SDS depletion spin columns containing an affinity resin, providing for both increased protein recovery and thorough SDS removal. Ion mobility spectrometry coupled with mass spectrometry (IMS-MS) allowed for a concurrent analysis of both analyte and detergent. In the case of both proteins and peptides, higher detergent concentrations than previously reported provided an increase of sample recovery; however there was a limit as SDS was detected by IMS-MS at higher levels of SDS indicating incomplete detergent depletion. The results also suggest that optimal conditions for SDS removal are dependent on the sample concentration. Overall, this study provides a useful guide for proteomic studies where SDS is required for efficient sample preparation. JF - Proteomics AU - Hengel, Shawna M AU - Floyd, Erica AU - Baker, Erin S AU - Zhao, Rui AU - Wu, Si AU - Pasa-Tolic, Ljiljana AD - Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, WA, USA. Y1 - 2012/11// PY - 2012 DA - Nov 2012 SP - 3138 EP - 3142 PB - Wiley-Blackwell, 111 River Street Hoboken NJ 07030-5774 United States VL - 12 IS - 21 SN - 1615-9853, 1615-9853 KW - Biotechnology and Bioengineering Abstracts KW - Resins KW - Mobility KW - Detergents KW - Adducts KW - Sodium lauryl sulfate KW - proteomics KW - Mass spectroscopy KW - W 30960:Bioinformatics & Computer Applications UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1529907421?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Abiotechresearch&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Proteomics&rft.atitle=Evaluation+of+SDS+depletion+using+an+affinity+spin+column+and+IMS-MS+detection&rft.au=Hengel%2C+Shawna+M%3BFloyd%2C+Erica%3BBaker%2C+Erin+S%3BZhao%2C+Rui%3BWu%2C+Si%3BPasa-Tolic%2C+Ljiljana&rft.aulast=Hengel&rft.aufirst=Shawna&rft.date=2012-11-01&rft.volume=12&rft.issue=21&rft.spage=3138&rft.isbn=&rft.btitle=&rft.title=Proteomics&rft.issn=16159853&rft_id=info:doi/10.1002%2Fpmic.201200168 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2014-05-01 N1 - Last updated - 2014-06-12 N1 - SubjectsTermNotLitGenreText - Resins; Mobility; Detergents; Adducts; Sodium lauryl sulfate; proteomics; Mass spectroscopy DO - http://dx.doi.org/10.1002/pmic.201200168 ER - TY - JOUR T1 - Data assimilation at the Hanford 300 Area AN - 1524614098; 2014-001226 AB - The persistent uranium plume at the Hanford 300 Area presents a challenging real-world scenario for inverse modeling and uncertainty quantification due to the complexity of transient groundwater flow driven by an extremely dynamic Columbia River stage and uncertainty in uranium distribution within the vadose and saturated zones. At the Integrated Field Research Challenge (IFRC) site within the 300 Area, researchers have conducted several field experiments injecting tracer and alternate water chemistry to invert for hydrologic properties and evaluate the geochemical response of sorbed uranium to stimulus. This work presents the application of a Bayesian data assimilation framework employing ensemble Kalman filters (EnKF) and high performance computing (HPC) to improve the hydrologic and geochemical conceptual models through assimilation of field characterization data (e.g. pump test, wellbore flow meter test) and injection experiment results (observed tracer and uranium concentrations). This research demonstrates the power of data assimilation with EnKF and HPC to reduce uncertainty in field applications. JF - Abstracts with Programs - Geological Society of America AU - Hammond, Glenn E AU - Chen, Xingyuan AU - Anonymous Y1 - 2012/11// PY - 2012 DA - November 2012 SP - 617 PB - Geological Society of America (GSA), Boulder, CO VL - 44 IS - 7 SN - 0016-7592, 0016-7592 KW - United States KW - contaminant plumes KW - Bayesian analysis KW - Hanford 300 area KW - characterization KW - unsaturated zone KW - ground water KW - pump tests KW - saturated zone KW - movement KW - tracers KW - water pollution KW - geochemistry KW - experimental studies KW - Washington KW - pollutants KW - Columbia River KW - statistical analysis KW - pollution KW - Hanford Site KW - inverse problem KW - hydrochemistry KW - models KW - metals KW - uranium KW - actinides KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1524614098?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=Data+assimilation+at+the+Hanford+300+Area&rft.au=Hammond%2C+Glenn+E%3BChen%2C+Xingyuan%3BAnonymous&rft.aulast=Hammond&rft.aufirst=Glenn&rft.date=2012-11-01&rft.volume=44&rft.issue=7&rft.spage=617&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2012 annual meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2014-01-01 N1 - PubXState - CO N1 - Last updated - 2014-05-15 N1 - CODEN - GAAPBC N1 - SubjectsTermNotLitGenreText - Hanford 300 area; actinides; Bayesian analysis; characterization; Columbia River; contaminant plumes; experimental studies; geochemistry; ground water; Hanford Site; hydrochemistry; inverse problem; metals; models; movement; pollutants; pollution; pump tests; saturated zone; statistical analysis; tracers; United States; unsaturated zone; uranium; Washington; water pollution ER - TY - JOUR T1 - Mineral weathering and biofilm development in the rhizosphere of pine trees AN - 1442374521; 2013-079537 AB - Fungi and bacteria are reported agents of chemical weathering and nutrient uptake. However, the role of rhizospheric biofilm in these processes is unknown. Our study investigates the mineral-fungus-bacteria interface and water chemical changes in the rhizosphere of pine. We hypothesized that under Ca and K limitation, thick biofilm cover would develop to facilitate direct cation uptake from minerals. Red pine was grown in columns in quartz sand amended with biotite and anorthite. Half of the trees were inoculated with an ectomycorrhizal fungus and forest soil bacteria, and the other half were left without inoculation. Columns without biology served as controls. Nutrient solutions contained Ca and K at 0, 10, 30, and 100% of requirements for healthy growth. At 3, 6 and 9 months subsets of the columns were destructively sampled. Biotite and anorthite were analyzed from each column using scanning election microscopy and energy dispersive X-ray spectroscopy. Drainage water samples were collected periodically for chemical analysis. Microscopy shows bacterial and fungal attachment to mineral surfaces, but particle and step edges are preferred. Biofilm cover is limited to isolated patches. Over time, the inoculated columns are dominated by bacteria colonies and fungal infection decreases to isolated spots. As Ca and K concentrations increased in solution, biofilm cover decreased and bacteria colonies became less diverse. Weathered crust formation was observed on anorthite and its coverage increased over time in all treatments with trees. Drainage pH decreased to about 4 after 6 weeks and remained low for rest of the experiment in all treatments with trees. The release of dissolved iron was strongly correlated to the water pH, with significantly higher iron concentrations at lower pHs. Lack of an inoculation treatment effect is consistent with limited rhizospheric fungal infection and limited biofilm development in this experiment. JF - Abstracts with Programs - Geological Society of America AU - Greenberg, Kyle A AU - Balogh-Brunstad, Z AU - Shi, Z AU - Arey, B AU - Dohnalkova, A AU - Niedziela, S M AU - Keller, C K AU - Anonymous Y1 - 2012/11// PY - 2012 DA - November 2012 SP - 394 PB - Geological Society of America (GSA), Boulder, CO VL - 44 IS - 7 SN - 0016-7592, 0016-7592 KW - processes KW - calcium KW - alkaline earth metals KW - experimental studies KW - solutions KW - alkali metals KW - solutes KW - rhizosphere KW - hydrochemistry KW - X-ray spectra KW - weathering KW - nutrients KW - mineral composition KW - fungi KW - metals KW - biofilms KW - bacteria KW - potassium KW - trees KW - spectra KW - geochemistry KW - SEM data KW - pH KW - 02A:General geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1442374521?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=Mineral+weathering+and+biofilm+development+in+the+rhizosphere+of+pine+trees&rft.au=Greenberg%2C+Kyle+A%3BBalogh-Brunstad%2C+Z%3BShi%2C+Z%3BArey%2C+B%3BDohnalkova%2C+A%3BNiedziela%2C+S+M%3BKeller%2C+C+K%3BAnonymous&rft.aulast=Greenberg&rft.aufirst=Kyle&rft.date=2012-11-01&rft.volume=44&rft.issue=7&rft.spage=394&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2012 annual meeting N1 - Copyright - GeoRef, Copyright 2013, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2013-01-01 N1 - PubXState - CO N1 - Last updated - 2013-10-17 N1 - CODEN - GAAPBC N1 - SubjectsTermNotLitGenreText - alkali metals; alkaline earth metals; bacteria; biofilms; calcium; experimental studies; fungi; geochemistry; hydrochemistry; metals; mineral composition; nutrients; pH; potassium; processes; rhizosphere; SEM data; solutes; solutions; spectra; trees; weathering; X-ray spectra ER - TY - JOUR T1 - A transmission electron microscopy study of the microbe-mineral interface in the rhizosphere of pine AN - 1438969406; 2013-075145 AB - Bacterial and fungal processes in weathering of minerals and in plant nutrient acquisition have been characterized in recent decades. However, the interactions of these processes in the rhizosphere are still poorly understood. In this study, we examined the mineral-fungus-biofilm interface using transmission electron microscopy (TEM). We hypothesized that a tree-fungus-bacteria association would increase biofilm formation under Ca and K limitations, and enhance mineral weathering as indicated by depletion profiles of elements beneath fungal and biofilm cover on mineral surfaces. Red pine trees were grown in columns in quartz sand amended with biotite and anorthite. Half of the trees were inoculated with Suillus tomentosus and forest soil bacteria, and the other half were left without microbial inoculation. Columns without any biology served as controls. Irrigation water contained Ca and K at 0, 10, 30 and 100% of amounts needed for healthy tree growth. After 3 months, a subset of columns was destructively sampled. Anorthite and biotite were collected from the rhizosphere of each tree and thin sections were prepared using focused ion beam-scanning electron microscopy (FIB-SEM). Several chemical profiles were analyzed on thin sections of the 0% treatment and a control with high resolution TEM and energy dispersive X-ray spectroscopy. Alteration of crystal structure was examined with selected area diffraction (SAD). A slight decrease of Ca concentration is seen on the fungus-covered anorthite FIB sections, and a slight depletion of K, Mg and Fe is found on the biofilm-covered biotite FIB sections compared to controls. The differences between treatments and controls are not significant after 3 months reaction time, but indicate direct elemental uptake from solid mineral phases. The SAD results show alteration of the crystal structure at the biofilm-mineral interface on the biotite FIB sections that are not seen on the controls. JF - Abstracts with Programs - Geological Society of America AU - Niedziela, Sheila M AU - Dohnalkova, A AU - Greenberg, K A AU - Arey, B AU - Balogh-Brunstad, Z AU - Shi, Z AU - Keller, C K AU - Anonymous Y1 - 2012/11// PY - 2012 DA - November 2012 SP - 245 EP - 246 PB - Geological Society of America (GSA), Boulder, CO VL - 44 IS - 7 SN - 0016-7592, 0016-7592 KW - calcium KW - alkaline earth metals KW - Spermatophyta KW - Plantae KW - Gymnospermae KW - alkali metals KW - rhizosphere KW - Coniferales KW - thin sections KW - X-ray spectra KW - weathering KW - TEM data KW - Pinus KW - nutrients KW - fungi KW - metals KW - biofilms KW - bacteria KW - potassium KW - Pinaceae KW - trees KW - spectra KW - SEM data KW - 09:Paleobotany UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1438969406?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=A+transmission+electron+microscopy+study+of+the+microbe-mineral+interface+in+the+rhizosphere+of+pine&rft.au=Niedziela%2C+Sheila+M%3BDohnalkova%2C+A%3BGreenberg%2C+K+A%3BArey%2C+B%3BBalogh-Brunstad%2C+Z%3BShi%2C+Z%3BKeller%2C+C+K%3BAnonymous&rft.aulast=Niedziela&rft.aufirst=Sheila&rft.date=2012-11-01&rft.volume=44&rft.issue=7&rft.spage=245&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2012 annual meeting N1 - Copyright - GeoRef, Copyright 2013, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2013-01-01 N1 - PubXState - CO N1 - Last updated - 2013-10-03 N1 - CODEN - GAAPBC N1 - SubjectsTermNotLitGenreText - alkali metals; alkaline earth metals; bacteria; biofilms; calcium; Coniferales; fungi; Gymnospermae; metals; nutrients; Pinaceae; Pinus; Plantae; potassium; rhizosphere; SEM data; spectra; Spermatophyta; TEM data; thin sections; trees; weathering; X-ray spectra ER - TY - JOUR T1 - Coupled simulation of surface-subsurface hydrologic processes with the open-source flow and reactive transport code PFLOTRAN AN - 1438969224; 2013-075246 AB - Advances in subsurface biogeochemical research and advanced computing capabilities have enabled the development of sophisticated, three-dimensional groundwater models employing multiple fluid phases and chemical components, coupled through a suite of biological and geochemical reactions at multiple scales. Such tools have enabled incredibly detailed simulations of contaminant fate and transport, but significant challenges remain in applying them to locations such as the Department of Energy Oak Ridge Reservation (ORR) in East Tennessee where strong interactions between surface and groundwater exist. For example, in Bear Creek valley in Oak Ridge, losing reaches of Bear Creek may deliver nutrients (e.g., labile organic carbon) that are the limiting reactant for microbial consumption of nitrate contamination in the groundwater, and gaining reaches deliver contaminants to surface water. Besides studies of environmental contaminants, the ability to capture coupled surface/subsurface hydrologic interactions is important in eco-hydro-climatological studies, where accurately modeling soil moisture is critical for capturing vegetation dynamics and soil moisture-rainfall feedbacks. To address such challenges, we have added a surface water component to PFLOTRAN. PFLOTRAN is an open-source (LGPL-licensed) code developed for simulation of multiscale, multiphase, multicomponent subsurface flow and reactive transport problems on machines ranging from laptops to leadership-class supercomputers. We have coupled the Richards equation treatment of the subsurface domain with shallow overland flow equations by enforcing continuity of pressure and flux at the ground surface. The underlying solver framework allows significant flexibility in how the governing equations are solved, and we will compare different surface flow formulations and strategies for coupling the surface and subsurface flow domains. We will also present some preliminary coupled surface-subsurface simulations at the ORR, where explicit treatment of overland flow could further improve understanding of the influence of heavy precipitation events on contaminant transport. JF - Abstracts with Programs - Geological Society of America AU - Mills, Richard Tran AU - Bisht, Gautam AU - Hammond, Glenn E AU - Lichtner, Peter AU - Kumar, Jitendra AU - Watson, David B AU - Brooks, Scott C AU - Anonymous Y1 - 2012/11// PY - 2012 DA - November 2012 SP - 262 EP - 263 PB - Geological Society of America (GSA), Boulder, CO VL - 44 IS - 7 SN - 0016-7592, 0016-7592 KW - United States KW - processes KW - Oak Ridge National Laboratory KW - hydrology KW - PFLOTRAN KW - three-dimensional models KW - biochemistry KW - eastern Tennessee KW - surface water KW - pollution KW - equations KW - simulation KW - ground water KW - Roane County Tennessee KW - Bear Creek valley KW - chemical reactions KW - transport KW - Richards equation KW - Tennessee KW - nitrate ion KW - water pollution KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1438969224?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=Coupled+simulation+of+surface-subsurface+hydrologic+processes+with+the+open-source+flow+and+reactive+transport+code+PFLOTRAN&rft.au=Mills%2C+Richard+Tran%3BBisht%2C+Gautam%3BHammond%2C+Glenn+E%3BLichtner%2C+Peter%3BKumar%2C+Jitendra%3BWatson%2C+David+B%3BBrooks%2C+Scott+C%3BAnonymous&rft.aulast=Mills&rft.aufirst=Richard&rft.date=2012-11-01&rft.volume=44&rft.issue=7&rft.spage=262&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2012 annual meeting N1 - Copyright - GeoRef, Copyright 2013, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2013-01-01 N1 - PubXState - CO N1 - Last updated - 2013-10-03 N1 - CODEN - GAAPBC N1 - SubjectsTermNotLitGenreText - Bear Creek valley; biochemistry; chemical reactions; eastern Tennessee; equations; ground water; hydrology; nitrate ion; Oak Ridge National Laboratory; PFLOTRAN; pollution; processes; Richards equation; Roane County Tennessee; simulation; surface water; Tennessee; three-dimensional models; transport; United States; water pollution ER - TY - JOUR T1 - CO (sub 2) sorption to ALALOH, ALMGOH and interlayer sites in Na-rich montmorillonite at CCS P-T conditions AN - 1429837647; 2013-067197 AB - Carbon capture and storage (CCS) in confined sedimentary formations has the potential to reduce the impact of fossil fuel combustion by storing CO (sub 2) in perpetuity. At PT conditions relevant to CCS, CO (sub 2) is less dense than the pre-existing brine the more buoyant CO (sub 2) will migrate to the top of the formation to be in contact with cap rock. Shale cap rocks are typically clay-rich and interactions between shales and CO (sub 2) is poorly understood at relevant PT conditions. In this study we use Na-rich montmorillonite (mont) as an analog for clay-rich shale. We use neutron diffraction, excess sorption and Attenuated Total Reflectance - Fourier Transform Infrared Spectroscopy (ATR -FTIR) analyses of mont at 35 degrees C and 50 degrees C and from 0-200 bars to examine CO (sub 2) interactions with mont under conditions relevant to CCS. Excess sorption isotherms, determined gravimetrically, provide an understanding of changes in the density of CO (sub 2) near the mineral surface. Maxima in the excess sorption isotherms were observed at a bulk density nearly equal 0.15 g/cm (super 3) and pressures of 58 bars (35 degrees C) and 64 bars (50 degrees C). Above this maxima, as the bulk density of the CO (sub 2) increases, the amount of CO (sub 2) sorbed to the clay decreases. Neutron diffraction measurements reveal a shift in the d(001) spacing from 12.10 Aa to 12.55 Aa and a decrease in the intensity of the d(001) peak, both of which are consistent with CO (sub 2) entering the interlayer region of the clay. The same clay sample was studied using ATR-FTIR to identify the crystallographic sites on which CO (sub 2) interacts with mont. Measurements were conducted on both hydrated and dried mont from 1-82 bars at 35 degrees and 50 degrees C. ATR-FTIR data show that the asymmetric stretch and bending mode of sorbed CO (sub 2) is modified by the presence of interlayer water, but the absorption bands representing adsorbed water (3564 and 2975 cm (super -1) ) are not affected by the presence of CO (sub 2) . Analysis of the data indicates that CO (sub 2) adsorbs in the interlayer space and potentially sorbs onto the edges of octahedral sheets of the mont structure, depending on hydration state. The rheological properties of the caprock are likely to be affected by CO (sub 2) - mont interactions, but further work is needed to determine if seal quality is more likely to be degraded or enhanced by this interaction. JF - Abstracts with Programs - Geological Society of America AU - Krukowski, Elizabeth G AU - Goodman, Angela AU - Rother, Gernot AU - Ilton, Eugene S AU - Bodnar, Robert J AU - Guthrie, George AU - Anonymous Y1 - 2012/11// PY - 2012 DA - November 2012 SP - 108 PB - Geological Society of America (GSA), Boulder, CO VL - 44 IS - 7 SN - 0016-7592, 0016-7592 KW - silicates KW - soil mechanics KW - sorption KW - carbon sequestration KW - sheet silicates KW - P-T conditions KW - montmorillonite KW - clay minerals KW - carbon dioxide KW - 30:Engineering geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1429837647?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=CO+%28sub+2%29+sorption+to+ALALOH%2C+ALMGOH+and+interlayer+sites+in+Na-rich+montmorillonite+at+CCS+P-T+conditions&rft.au=Krukowski%2C+Elizabeth+G%3BGoodman%2C+Angela%3BRother%2C+Gernot%3BIlton%2C+Eugene+S%3BBodnar%2C+Robert+J%3BGuthrie%2C+George%3BAnonymous&rft.aulast=Krukowski&rft.aufirst=Elizabeth&rft.date=2012-11-01&rft.volume=44&rft.issue=7&rft.spage=108&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2012 annual meeting N1 - Copyright - GeoRef, Copyright 2013, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2013-01-01 N1 - PubXState - CO N1 - Last updated - 2013-09-05 N1 - CODEN - GAAPBC N1 - SubjectsTermNotLitGenreText - carbon dioxide; carbon sequestration; clay minerals; montmorillonite; P-T conditions; sheet silicates; silicates; soil mechanics; sorption ER - TY - JOUR T1 - A multi-omic systems approach to elucidating Yersiniavirulence mechanisms AN - 1285091439; 17439264 AB - The underlying mechanisms that lead to dramatic differences between closely related pathogens are not always readily apparent. For example, the genomes of Yersinia pestis(YP) the causative agent of plague with a high mortality rate and Yersinia pseudotuberculosis(YPT) an enteric pathogen with a modest mortality rate are highly similar with some species specific differences; however the molecular causes of their distinct clinical outcomes remain poorly understood. In this study, a temporal multi-omic analysis of YP and YPT at physiologically relevant temperatures was performed to gain insights into how an acute and highly lethal bacterial pathogen, YP, differs from its less virulent progenitor, YPT. This analysis revealed higher gene and protein expression levels of conserved major virulence factors in YP relative to YPT, including the Yop virulon and the pH6 antigen. This suggests that adaptation in the regulatory architecture, in addition to the presence of unique genetic material, may contribute to the increased pathogenecity of YP relative to YPT. Additionally, global transcriptome and proteome responses of YP and YPT revealed conserved post-transcriptional control of metabolism and the translational machinery including the modulation of glutamate levels in Yersiniae. Finally, the omics data was coupled with a computational network analysis, allowing an efficient prediction of novel Yersiniavirulence factors based on gene and protein expression patterns. JF - Molecular BioSystems AU - Ansong, Charles AU - Schrimpe-Rutledge, Alexandra C AU - Mitchell, Hugh D AU - Chauhan, Sadhana AU - Jones, Marcus B AU - Kim, Young-Mo AU - McAteer, Kathleen AU - Deatherage Kaiser, Brooke L AU - Dubois, Jennifer L AU - Brewer, Heather M AU - Frank, Bryan C AU - McDermott, Jason E AU - Metz, Thomas O AU - Peterson, Scott N AU - Smith, Richard D AU - Motin, Vladimir L AU - Adkins, Joshua N AD - Biological Sciences Division; Pacific Northwest National Laboratory; P. O. Box 999; Richland; WA 99352; USA; +1 509-371-6555; +1 509-371-6583; , Joshua.Adkins@pnnl.gov Y1 - 2012/11// PY - 2012 DA - Nov 2012 SP - 44 EP - 54 PB - Royal Society of Chemistry VL - 9 IS - 1 SN - 1742-206X, 1742-206X KW - Microbiology Abstracts B: Bacteriology KW - Adaptations KW - Computer applications KW - Data processing KW - Gene expression KW - Genomes KW - Glutamic acid KW - Metabolism KW - Mortality KW - Pathogens KW - Plague KW - Post-transcription KW - Stem cells KW - Temperature effects KW - Translation KW - virulence factors KW - Yersinia KW - J 02320:Cell Biology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1285091439?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Amicrobiologyb&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Molecular+BioSystems&rft.atitle=A+multi-omic+systems+approach+to+elucidating+Yersiniavirulence+mechanisms&rft.au=Ansong%2C+Charles%3BSchrimpe-Rutledge%2C+Alexandra+C%3BMitchell%2C+Hugh+D%3BChauhan%2C+Sadhana%3BJones%2C+Marcus+B%3BKim%2C+Young-Mo%3BMcAteer%2C+Kathleen%3BDeatherage+Kaiser%2C+Brooke+L%3BDubois%2C+Jennifer+L%3BBrewer%2C+Heather+M%3BFrank%2C+Bryan+C%3BMcDermott%2C+Jason+E%3BMetz%2C+Thomas+O%3BPeterson%2C+Scott+N%3BSmith%2C+Richard+D%3BMotin%2C+Vladimir+L%3BAdkins%2C+Joshua+N&rft.aulast=Ansong&rft.aufirst=Charles&rft.date=2012-11-01&rft.volume=9&rft.issue=1&rft.spage=44&rft.isbn=&rft.btitle=&rft.title=Molecular+BioSystems&rft.issn=1742206X&rft_id=info:doi/10.1039%2Fc2mb25287b LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-01 N1 - Number of references - 63 N1 - Last updated - 2013-02-22 N1 - SubjectsTermNotLitGenreText - Temperature effects; Genomes; Mortality; Translation; Adaptations; Data processing; virulence factors; Pathogens; Computer applications; Gene expression; Stem cells; Plague; Glutamic acid; Post-transcription; Metabolism; Yersinia DO - http://dx.doi.org/10.1039/c2mb25287b ER - TY - JOUR T1 - Evaluation of two-phase relative permeability and capillary pressure relations for unstable displacements in a pore network AN - 1270042137; 2013-009576 AB - At the pore scale, unstable displacement is often observed for two-fluid systems, depending on the capillary number and fluid viscosity ratio. At the continuum scale, unstable displacement is usually not considered. In this work, relations between nonwetting fluid relative permeabilities (k (sub rn) ), fluid saturations (S (sub n) ), and capillary pressure heads (h (sub c) ) are evaluated to predict average S (sub n) values using a continuum-based simulator for displacements in a micromodel. To this end, a series of displacement experiments was conducted using five wetting-nonwetting immiscible fluid pairs in a homogenous pore network. The micromodel was initially saturated with either polyethylene glycol 200 (PEG) or water as a wetting fluid, which was subsequently displaced by a nonwetting fluid (dodecane, hexadecane, or mineral oil) at different flow rates. Nonwetting fluid saturations increased with increasing flow rates for all five fluid pairs. Viscous fingering occurred when PEG was displaced by either dodecane or hexadecane. For the displacements of water, capillary fingers were observed at low capillary numbers. Fitting the experimental S (sub n) and h (sub c) data with the BrooksCorey relationship indicated that the fitted and computed entry pressure heads, based on pore geometry and fluid properties, compare reasonably well. However, the fitted pore geometry factor values for these displacements are considerably lower than what is expected for displacements in homogeneous, highly uniform, porous systems, demonstrating the impact of unstable displacement. It was shown that a continuum-based multiphase simulator could be used to reasonably estimate the average S (sub n) behavior for unstable wetting fluid displacement in a pore network as long as independently fitted h (sub c) -S (sub n) and k (sub rn) -S (sub n) relations were used. JF - Vadose Zone Journal AU - DeHoff, K J AU - Oostrom, Mart AU - Zhang, C AU - Grate, J W Y1 - 2012/11// PY - 2012 DA - November 2012 PB - Soil Science Society of America, Madison, WI VL - 11 IS - 4 KW - mineral oil KW - capillary pressure KW - dodecane KW - unsteady flow KW - unsaturated zone KW - mass spectra KW - fluid phase KW - dense nonaqueous phase liquids KW - simulation KW - laboratory studies KW - hydrodynamics KW - spectra KW - water KW - experimental studies KW - two-phase models KW - numerical models KW - pollution KW - porosity KW - nonaqueous phase liquids KW - ICP mass spectra KW - organic compounds KW - saturation KW - immiscibility KW - soil pollution KW - polyethylene glycol KW - multiphase flow KW - hydrocarbons KW - wettability KW - permeability KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1270042137?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Vadose+Zone+Journal&rft.atitle=Evaluation+of+two-phase+relative+permeability+and+capillary+pressure+relations+for+unstable+displacements+in+a+pore+network&rft.au=DeHoff%2C+K+J%3BOostrom%2C+Mart%3BZhang%2C+C%3BGrate%2C+J+W&rft.aulast=DeHoff&rft.aufirst=K&rft.date=2012-11-01&rft.volume=11&rft.issue=4&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Vadose+Zone+Journal&rft.issn=1539-1663&rft_id=info:doi/10.2136%2Fvzj2012.0024 L2 - http://www.vadosezonejournal.org LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2013, American Geosciences Institute. Abstract, Copyright, Soil Science Society of America | Reference includes data from GeoScienceWorld, Alexandria, VA, United States N1 - Date revised - 2013-01-01 N1 - Number of references - 47 N1 - PubXState - WI N1 - Document feature - illus. incl. 3 tables N1 - Last updated - 2013-01-17 N1 - SubjectsTermNotLitGenreText - capillary pressure; dense nonaqueous phase liquids; dodecane; experimental studies; fluid phase; hydrocarbons; hydrodynamics; ICP mass spectra; immiscibility; laboratory studies; mass spectra; mineral oil; multiphase flow; nonaqueous phase liquids; numerical models; organic compounds; permeability; pollution; polyethylene glycol; porosity; saturation; simulation; soil pollution; spectra; two-phase models; unsaturated zone; unsteady flow; water; wettability DO - http://dx.doi.org/10.2136/vzj2012.0024 ER - TY - JOUR T1 - Effects of porous medium heterogeneity on vadose zone desiccation; intermediate-scale laboratory experiments and simulations AN - 1270041747; 2013-009588 AB - Soil desiccation (drying), involving water evaporation induced by dry gas injection, is a potentially robust vadose zone remediation process to limit contaminant transport through the vadose zone. A series of four intermediate-scale flow cell experiments was conducted in homogeneous and simple layered heterogeneous porous medium systems to investigate the effects of heterogeneity on desiccation of unsaturated porous media. The permeability ratios of porous medium layers ranged from about 5 to almost 2 orders of magnitude. The insulated flow cell was equipped with 20 humidity and temperature sensors while a dual-energy gamma system was used to determine water saturations at various times. The multiphase code STOMP was used to simulate the desiccation process. For the layered systems, results show that injected dry gas flowed predominantly in the higher permeability layer and delayed water removal from the lower permeability material. For the configurations tested, water vapor diffusion from the lower to the higher permeability zone was considerable over the duration of the experiments, resulting in much larger relative humidity values of the outgoing air than based on permeability ratios alone. Acceptable numerical matches with the experimental data were obtained when an extension of the saturation-capillary pressure relation below the residual water saturation was used. The agreements between numerical and experimental results suggest that the correct physics is implemented in the simulator. JF - Vadose Zone Journal AU - Oostrom, Mart AU - Freedman, V L AU - Wietsma, T W AU - Dane, J H AU - Truex, M J Y1 - 2012/11// PY - 2012 DA - November 2012 PB - Soil Science Society of America, Madison, WI VL - 11 IS - 4 KW - United States KW - unsaturated zone KW - simulation KW - layered materials KW - laboratory studies KW - sediments KW - heterogeneity KW - dual permeability KW - flow cells KW - sand KW - experimental studies KW - Washington KW - numerical models KW - Hanford Mock Tank Site KW - clastic sediments KW - pollutants KW - pollution KW - Hanford Site KW - porous materials KW - desiccation KW - gas injection KW - evaporation KW - permeability KW - field studies KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1270041747?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Vadose+Zone+Journal&rft.atitle=Effects+of+porous+medium+heterogeneity+on+vadose+zone+desiccation%3B+intermediate-scale+laboratory+experiments+and+simulations&rft.au=Oostrom%2C+Mart%3BFreedman%2C+V+L%3BWietsma%2C+T+W%3BDane%2C+J+H%3BTruex%2C+M+J&rft.aulast=Oostrom&rft.aufirst=Mart&rft.date=2012-11-01&rft.volume=11&rft.issue=4&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Vadose+Zone+Journal&rft.issn=1539-1663&rft_id=info:doi/10.2136%2Fvzj2011.0168 L2 - http://www.vadosezonejournal.org LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2013, American Geosciences Institute. Abstract, Copyright, Soil Science Society of America | Reference includes data from GeoScienceWorld, Alexandria, VA, United States N1 - Date revised - 2013-01-01 N1 - Number of references - 29 N1 - PubXState - WI N1 - Document feature - illus. incl. 3 tables N1 - Last updated - 2013-04-19 N1 - SubjectsTermNotLitGenreText - clastic sediments; desiccation; dual permeability; evaporation; experimental studies; field studies; flow cells; gas injection; Hanford Mock Tank Site; Hanford Site; heterogeneity; laboratory studies; layered materials; numerical models; permeability; pollutants; pollution; porous materials; sand; sediments; simulation; United States; unsaturated zone; Washington DO - http://dx.doi.org/10.2136/vzj2011.0168 ER - TY - JOUR T1 - Quantifying transport uncertainty in unsaturated rock using Monte Carlo sampling of retention curves AN - 1270041746; 2013-009587 AB - We have developed a new Monte Carlo sampling method for simulating flow and transport in unsaturated porous media, characterized by van Genuchten-Mualem constitutive relations. Instead of sampling each individual soil parameter from its probability space and then running Monte Carlo simulations using realizations of rock parameters directly, we calculate retention curves from realizations of rock parameters, take subsamples from these retention curves, and run simulations using parameter realizations corresponding to these selected retention curves. The retention curve subsampling methodology was applied to three-dimensional simulations of conservative tracer transport beneath Material Disposal Area G at the Los Alamos National Laboratory. Convergence of the proposed sampling method was assessed by comparing statistics of breakthrough curves observed at a compliance boundary with those obtained using between 25 and 1000 Latin hypercube sampling (LHS) Monte Carlo simulations. Our example shows that 25 model runs based on selected retention curves could adequately approximate the results from our assumed truth (1000 LHS Monte Carlo simulations), while LHS alone required in excess of 50 realizations to achieve the same quality result. Another finding from this work is that the median of the breakthrough curves was more meaningful than the arithmetic mean of curves, and the former was nearly identical to the breakthrough curve derived from mean rock properties. JF - Vadose Zone Journal AU - Stauffer, Philip H AU - Lu, Zhiming Y1 - 2012/11// PY - 2012 DA - November 2012 PB - Soil Science Society of America, Madison, WI VL - 11 IS - 4 KW - United States KW - Pajarito Plateau KW - unsaturated zone KW - hydrogeology KW - New Mexico KW - Los Alamos County New Mexico KW - simulation KW - Cenozoic KW - finite element analysis KW - hydrologic cycle KW - Bandelier Tuff KW - transport KW - sampling KW - quantitative analysis KW - tracers KW - retention KW - Tsirege Member KW - Latin hypercube technique KW - breakthrough curves KW - mass transfer KW - uncertainty KW - soils KW - hydrology KW - experimental studies KW - van Genuchten-Mualem model KW - Quaternary KW - numerical models KW - Monte Carlo analysis KW - statistical analysis KW - White Rock New Mexico KW - Los Alamos National Laboratory KW - boundary conditions KW - heterogeneous materials KW - saturation KW - Pleistocene KW - constitutive equations KW - waste disposal KW - low-level waste KW - 21:Hydrogeology KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1270041746?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Vadose+Zone+Journal&rft.atitle=Quantifying+transport+uncertainty+in+unsaturated+rock+using+Monte+Carlo+sampling+of+retention+curves&rft.au=Stauffer%2C+Philip+H%3BLu%2C+Zhiming&rft.aulast=Stauffer&rft.aufirst=Philip&rft.date=2012-11-01&rft.volume=11&rft.issue=4&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Vadose+Zone+Journal&rft.issn=1539-1663&rft_id=info:doi/10.2136%2Fvzj2011.0171 L2 - http://www.vadosezonejournal.org LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2013, American Geosciences Institute. Abstract, Copyright, Soil Science Society of America | Reference includes data from GeoScienceWorld, Alexandria, VA, United States N1 - Date revised - 2013-01-01 N1 - Number of references - 33 N1 - PubXState - WI N1 - Document feature - illus. incl. 1 table, sketch map N1 - Last updated - 2013-01-17 N1 - SubjectsTermNotLitGenreText - Bandelier Tuff; boundary conditions; breakthrough curves; Cenozoic; constitutive equations; experimental studies; finite element analysis; heterogeneous materials; hydrogeology; hydrologic cycle; hydrology; Latin hypercube technique; Los Alamos County New Mexico; Los Alamos National Laboratory; low-level waste; mass transfer; Monte Carlo analysis; New Mexico; numerical models; Pajarito Plateau; Pleistocene; quantitative analysis; Quaternary; retention; sampling; saturation; simulation; soils; statistical analysis; tracers; transport; Tsirege Member; uncertainty; United States; unsaturated zone; van Genuchten-Mualem model; waste disposal; White Rock New Mexico DO - http://dx.doi.org/10.2136/vzj2011.0171 ER - TY - JOUR T1 - Experimental investigation of the effective foam viscosity in unsaturated porous media AN - 1270041745; 2013-009586 AB - Foam has the potential to effectively carry and distribute either aqueous or gaseous amendments to the deep vadose zone for contaminant remediation. However, the transport of foam in porous media is complicated because flow characteristics such as effective viscosity are affected not only by foam properties but also by the sediment properties and flow conditions. We determined the average effective foam viscosity via a series of laboratory experiments and found that the effective foam viscosity was significantly higher than the viscosity of gas or water and increased with the liquid fraction in foam, the injection rate, and sediment permeability. These impacts are successfully described with a mathematical expression, which is further demonstrated with data from the literature. These results suggest that, when foam is used in deep vadose zone remediation, foam flow is almost not affected by gravity and is capable of distributing amendments uniformly in heterogeneous sediments. JF - Vadose Zone Journal AU - Zhang, Z Fred AU - Zhong, Lirong AU - White, Mark D AU - Szecsody, James E Y1 - 2012/11// PY - 2012 DA - November 2012 PB - Soil Science Society of America, Madison, WI VL - 11 IS - 4 KW - experimental studies KW - unsaturated zone KW - pollution KW - porous materials KW - mathematical models KW - equations KW - aqueous solutions KW - remediation KW - spatial distribution KW - viscosity KW - transport KW - surfactants KW - movement KW - sediments KW - water pollution KW - permeability KW - foam KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1270041745?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Vadose+Zone+Journal&rft.atitle=Experimental+investigation+of+the+effective+foam+viscosity+in+unsaturated+porous+media&rft.au=Zhang%2C+Z+Fred%3BZhong%2C+Lirong%3BWhite%2C+Mark+D%3BSzecsody%2C+James+E&rft.aulast=Zhang&rft.aufirst=Z&rft.date=2012-11-01&rft.volume=11&rft.issue=4&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Vadose+Zone+Journal&rft.issn=1539-1663&rft_id=info:doi/10.2136%2Fvzj2011.0190 L2 - http://www.vadosezonejournal.org LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2013, American Geosciences Institute. Abstract, Copyright, Soil Science Society of America | Reference includes data from GeoScienceWorld, Alexandria, VA, United States N1 - Date revised - 2013-01-01 N1 - Number of references - 16 N1 - PubXState - WI N1 - Document feature - illus. incl. 1 table N1 - Last updated - 2013-01-17 N1 - SubjectsTermNotLitGenreText - aqueous solutions; equations; experimental studies; foam; mathematical models; movement; permeability; pollution; porous materials; remediation; sediments; spatial distribution; surfactants; transport; unsaturated zone; viscosity; water pollution DO - http://dx.doi.org/10.2136/vzj2011.0190 ER - TY - JOUR T1 - Vadose zone soil moisture wicking using super-absorbent polymers AN - 1270041744; 2013-009585 AB - Super-absorbent polymers (SAPs) have the potential to remove water and associated contaminants from unsaturated sediments. Laboratory experiments were conducted to test four types of SAPs. Column experiments, with a layer of polymer on top of unsaturated porous media, showed the ability of the SAPs to extract up to 80% of initial water during periods up to 4 wk. In column experiments where the sorbent was emplaced between layers of unsaturated porous media, gel formation was observed at both the sorbent-porous medium interfaces. The extraction percentages were similar for both configurations and no obvious differences were observed for the four SAPs. Two flow cells were used to test the wicking behavior in two dimensions using three configurations. The largest removal percentages occurred for the horizontal sorbent layer configuration, which had the largest interfacial area. In a larger flow cell, a woven nylon "sock" was packed with sorbent and placed between perforated metal plates, mimicking a well configuration. After 1 wk of contact time, the sock was removed and replaced by a fresh sock. The results showed that the sorbent was able to continuously extract water from the porous media, although the rate decreased with time. The declining yield was associated with the sharp reduction in water saturation and relative permeability near the sorbent. The capillary pressure continued to increase during the total contact time, indicating that the sorbent remained active during that period. This work has demonstrated the potential of soil moisture wicking using SAPs at the proof-of-principle level. JF - Vadose Zone Journal AU - Oostrom, Mart AU - Smoot, K V AU - Wietsma, T W AU - Truex, M J AU - Benecke, M D AU - Chronister, G B Y1 - 2012/11// PY - 2012 DA - November 2012 PB - Soil Science Society of America, Madison, WI VL - 11 IS - 4 KW - water KW - United States KW - sand KW - experimental studies KW - Washington KW - clastic sediments KW - wicking KW - pollutants KW - moisture KW - reclamation KW - unsaturated zone KW - pollution KW - optimization KW - Hanford Site KW - porous materials KW - southeastern Washington KW - remediation KW - absorbent materials KW - super-absorbent materials KW - sediments KW - Columbia Plateau KW - polymers KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1270041744?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Vadose+Zone+Journal&rft.atitle=Vadose+zone+soil+moisture+wicking+using+super-absorbent+polymers&rft.au=Oostrom%2C+Mart%3BSmoot%2C+K+V%3BWietsma%2C+T+W%3BTruex%2C+M+J%3BBenecke%2C+M+D%3BChronister%2C+G+B&rft.aulast=Oostrom&rft.aufirst=Mart&rft.date=2012-11-01&rft.volume=11&rft.issue=4&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Vadose+Zone+Journal&rft.issn=1539-1663&rft_id=info:doi/10.2136%2Fvzj2011.0200 L2 - http://www.vadosezonejournal.org LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2013, American Geosciences Institute. Abstract, Copyright, Soil Science Society of America | Reference includes data from GeoScienceWorld, Alexandria, VA, United States N1 - Date revised - 2013-01-01 N1 - Number of references - 13 N1 - PubXState - WI N1 - Document feature - illus. incl. 6 tables N1 - Last updated - 2013-01-17 N1 - SubjectsTermNotLitGenreText - absorbent materials; clastic sediments; Columbia Plateau; experimental studies; Hanford Site; moisture; optimization; pollutants; pollution; polymers; porous materials; reclamation; remediation; sand; sediments; southeastern Washington; super-absorbent materials; United States; unsaturated zone; Washington; water; wicking DO - http://dx.doi.org/10.2136/vzj2011.0200 ER - TY - JOUR T1 - Characterizing vadose zone hydrocarbon biodegradation using carbon dioxide effluxes, isotopes, and reactive transport modeling AN - 1270041743; 2013-009584 AB - Naturally occurring biodegradation of hydrocarbon compounds may offer a sustainable management option at contaminated sites. However, a sound understanding of contaminant mass loss rates is required to enable estimation of source zone longevity, serving to alleviate public concerns and inform decision makers. Under some conditions, surficial CO (sub 2) efflux measurements can be useful to delineate petroleum hydrocarbon containing source zones, and to provide estimates of depth-integrated vadose zone hydrocarbon degradation rates. However, the accuracy of degradation rate estimates is limited by our ability to separate CO (sub 2) effluxes associated with contaminant decomposition from those attributable to naturally occurring soil respiration. To understand CO (sub 2) sources and transport processes within the vadose zone, this work combines measurement of surficial CO (sub 2) effluxes with detailed analysis of soil gas composition- including the radiocarbon and stable isotopic composition of CO (sub 2) . Quantitative reactive transport modeling allows further evaluation of controls on CO (sub 2) generation and fate, and CH (sub 4) generation and oxidation. Results confirm that, in the source zone at the Bemidji site, the majority of CO (sub 2) originates from degradation of the oil body. In addition, radiocarbon in CO (sub 2) proves particularly useful in determining the contribution of contaminant degradation to the measured CO (sub 2) efflux. JF - Vadose Zone Journal AU - Sihota, Natasha J AU - Mayer, K Ulrich Y1 - 2012/11// PY - 2012 DA - November 2012 PB - Soil Science Society of America, Madison, WI VL - 11 IS - 4 KW - United States KW - respiration KW - isotopes KW - aliphatic hydrocarbons KW - unsaturated zone KW - light nonaqueous phase liquids KW - stable isotopes KW - remediation KW - ground water KW - carbon dioxide KW - aerobic environment KW - partitioning KW - radioactive isotopes KW - transport KW - quantitative analysis KW - carbon KW - oil spills KW - natural attenuation KW - reactive transport KW - Beltrami County Minnesota KW - soils KW - Minnesota KW - biodegradation KW - methane KW - pollutants KW - isotope ratios KW - C-13/C-12 KW - pollution KW - alkanes KW - petroleum products KW - Bemidji Minnesota KW - depth KW - aquifers KW - nonaqueous phase liquids KW - organic compounds KW - soil pollution KW - hydrocarbons KW - anaerobic environment KW - C-14 KW - 02D:Isotope geochemistry KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1270041743?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Vadose+Zone+Journal&rft.atitle=Characterizing+vadose+zone+hydrocarbon+biodegradation+using+carbon+dioxide+effluxes%2C+isotopes%2C+and+reactive+transport+modeling&rft.au=Sihota%2C+Natasha+J%3BMayer%2C+K+Ulrich&rft.aulast=Sihota&rft.aufirst=Natasha&rft.date=2012-11-01&rft.volume=11&rft.issue=4&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Vadose+Zone+Journal&rft.issn=1539-1663&rft_id=info:doi/10.2136%2Fvzj2011.0204 L2 - http://www.vadosezonejournal.org LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2013, American Geosciences Institute. Abstract, Copyright, Soil Science Society of America | Reference includes data from GeoScienceWorld, Alexandria, VA, United States N1 - Date revised - 2013-01-01 N1 - Number of references - 53 N1 - PubXState - WI N1 - Document feature - illus. incl. 4 tables N1 - SuppNotes - Supplemental information/data is available in the online version of this article N1 - Last updated - 2013-01-17 N1 - SubjectsTermNotLitGenreText - aerobic environment; aliphatic hydrocarbons; alkanes; anaerobic environment; aquifers; Beltrami County Minnesota; Bemidji Minnesota; biodegradation; C-13/C-12; C-14; carbon; carbon dioxide; depth; ground water; hydrocarbons; isotope ratios; isotopes; light nonaqueous phase liquids; methane; Minnesota; natural attenuation; nonaqueous phase liquids; oil spills; organic compounds; partitioning; petroleum products; pollutants; pollution; quantitative analysis; radioactive isotopes; reactive transport; remediation; respiration; soil pollution; soils; stable isotopes; transport; United States; unsaturated zone DO - http://dx.doi.org/10.2136/vzj2011.0204 ER - TY - JOUR T1 - Contaminants in the vadose zone AN - 1270041742; 2013-009583 JF - Vadose Zone Journal Y1 - 2012/11// PY - 2012 DA - November 2012 PB - Soil Science Society of America, Madison, WI VL - 11 IS - 4 KW - nonaqueous phase liquids KW - soil pollution KW - pollutants KW - unsaturated zone KW - pollution KW - light nonaqueous phase liquids KW - water pollution KW - research KW - ground water KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1270041742?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/GeoRef&rft_val_fmt=info:ofi/fmt:kev:mtx:book&rft.genre=book&rft.jtitle=&rft.atitle=&rft.au=&rft.aulast=&rft.aufirst=&rft.date=2012-11-01&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=Contaminants+in+the+vadose+zone&rft.title=Contaminants+in+the+vadose+zone&rft.issn=1539-1663&rft_id=info:doi/ L2 - http://www.vadosezonejournal.org LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2013, American Geosciences Institute. Reference includes data from GeoScienceWorld, Alexandria, VA, United States N1 - Date revised - 2013-01-01 N1 - PubXState - WI N1 - Document feature - illus. N1 - SuppNotes - Individual papers are cited separately N1 - Last updated - 2013-01-17 N1 - SubjectsTermNotLitGenreText - ground water; light nonaqueous phase liquids; nonaqueous phase liquids; pollutants; pollution; research; soil pollution; unsaturated zone; water pollution ER - TY - JOUR T1 - Radionuclide transport in the unsaturated zone at Yucca Mountain, Nevada AN - 1270041536; 2013-009595 AB - This paper presents a comprehensive treatment of large-scale unsaturated zone (UZ) transport below the repository at the Yucca Mountain, Nevada, reporting on studies investigating the UZ as a component of the Lower Natural Barrier to radionuclide transport from the site. Regardless of the disposition of Yucca Mountain as the site for a nuclear waste repository, these studies and models of radionuclide transport through the UZ have relevance to the study of contaminant transport through deep vadose zones in general. For many radionuclides, including most strongly sorbing species, the Yucca Mountain UZ was found to prevent or substantially reduce the rate of movement of radionuclides to the accessible environment. The UZ radionuclide transport models developed for Yucca Mountain simulate the features and processes that influence the capability of the UZ below the repository to reduce the movement of radionuclides. Transport of radionuclides away from the repository depends on the rate and pathways of flow within the UZ, the retardation of radionuclides, and the rate of transport by colloids. Several basic processes affect radionuclide transport in the UZ, including the quantity of recharge and deep percolation of water, flow partitioning between fractures and rock matrix, diffusion of radionuclides from water flowing in fractures into the pores of the rock matrix, sorption of radionuclides onto rock or mineral surfaces, and colloid filtration. This paper summarizes the treatment of these and other processes, describing the experimental and observational basis for the models, conceptualizations, and predictions, and then presents some representative results. JF - Vadose Zone Journal AU - Robinson, Bruce A AU - Houseworth, James E AU - Chu, Shaoping Y1 - 2012/11// PY - 2012 DA - November 2012 PB - Soil Science Society of America, Madison, WI VL - 11 IS - 4 KW - United States KW - volcanic rocks KW - isotopes KW - igneous rocks KW - unsaturated zone KW - hydrogeology KW - Tiva Canyon Member KW - radioactive waste KW - ground water KW - radioactive isotopes KW - transport KW - tracers KW - tuff KW - breakthrough curves KW - Yucca Mountain KW - Nevada KW - disposal barriers KW - diffusion KW - colloidal materials KW - numerical models KW - welded tuff KW - pollutants KW - pollution KW - advection KW - Nye County Nevada KW - water table KW - Topopah Spring Member KW - pyroclastics KW - southern Nevada KW - infiltration KW - Crater Flat Unit KW - Calico Hills Unit KW - waste disposal KW - natural barriers KW - review KW - storage KW - Paintbrush Tuff KW - field studies KW - 02D:Isotope geochemistry KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1270041536?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Vadose+Zone+Journal&rft.atitle=Radionuclide+transport+in+the+unsaturated+zone+at+Yucca+Mountain%2C+Nevada&rft.au=Robinson%2C+Bruce+A%3BHouseworth%2C+James+E%3BChu%2C+Shaoping&rft.aulast=Robinson&rft.aufirst=Bruce&rft.date=2012-11-01&rft.volume=11&rft.issue=4&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Vadose+Zone+Journal&rft.issn=1539-1663&rft_id=info:doi/10.2136%2Fvzj2011.0133 L2 - http://www.vadosezonejournal.org LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2013, American Geosciences Institute. Abstract, Copyright, Soil Science Society of America | Reference includes data from GeoScienceWorld, Alexandria, VA, United States N1 - Date revised - 2013-01-01 N1 - Number of references - 61 N1 - PubXState - WI N1 - Document feature - illus. incl. 2 tables, geol. sketch map N1 - Last updated - 2013-04-19 N1 - SubjectsTermNotLitGenreText - advection; breakthrough curves; Calico Hills Unit; colloidal materials; Crater Flat Unit; diffusion; disposal barriers; field studies; ground water; hydrogeology; igneous rocks; infiltration; isotopes; natural barriers; Nevada; numerical models; Nye County Nevada; Paintbrush Tuff; pollutants; pollution; pyroclastics; radioactive isotopes; radioactive waste; review; southern Nevada; storage; Tiva Canyon Member; Topopah Spring Member; tracers; transport; tuff; United States; unsaturated zone; volcanic rocks; waste disposal; water table; welded tuff; Yucca Mountain DO - http://dx.doi.org/10.2136/vzj2011.0133 ER - TY - JOUR T1 - Simulation of radionuclide transport through unsaturated, fractured rock; application to Yucca Mountain, Nevada AN - 1270041535; 2013-009594 AB - This paper describes the numerical methods developed to simulate the transport of radionuclides through the unsaturated, fractured rock below the proposed repository at the Yucca Mountain. Regardless of the disposition of the Yucca Mountain License Application, this method has general applicability for modeling contaminant transport through deep vadose zones. Using a dual-permeability solution for fluid flow as a basis, the transport model represents contaminant transport with a cell-based particle-tracking technique in which particles move from cell to cell in the three-dimensional large-scale grid of two overlapping continua. Particle movement between cells, and the residence time within a cell, is computed probabilistically based on transfer functions using numerical solutions of the transport equations for an idealized fracture-matrix system. Using this approach, the following transport phenomena are simulated: advection through fracture and matrix continua, including between these continua, dispersion, sorption of dissolved radionuclides to the matrix continuum, and within the fault zones, and molecular diffusion between the fractures and matrix. In addition to providing a realistic representation of the relevant processes, this method has the virtue of computational efficiency. After describing the numerical method, this paper presents sensitivity analyses for radionuclide transport travel time distributions from the proposed repository to the water table through the unsaturated zone for the Yucca Mountain system. JF - Vadose Zone Journal AU - Robinson, Bruce A AU - Chu, Shaoping AU - Lu, Zhiming Y1 - 2012/11// PY - 2012 DA - November 2012 PB - Soil Science Society of America, Madison, WI VL - 11 IS - 4 KW - United States KW - fractured materials KW - sorption KW - neptunium KW - volcanic rocks KW - isotopes KW - plutonium KW - igneous rocks KW - unsaturated zone KW - discrete fracture model KW - fracturing KW - simulation KW - radioactive waste KW - radioactive isotopes KW - transport KW - movement KW - tracers KW - applications KW - tuff KW - Calico Hills Formation KW - Yucca Mountain KW - uncertainty KW - Nevada KW - technetium KW - numerical models KW - Np-237 KW - statistical analysis KW - Tc-99 KW - equations KW - advection KW - Nye County Nevada KW - pyroclastics KW - metals KW - infiltration KW - traveltime KW - waste disposal KW - actinides KW - permeability KW - Pu-240 KW - 02D:Isotope geochemistry KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1270041535?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Vadose+Zone+Journal&rft.atitle=Simulation+of+radionuclide+transport+through+unsaturated%2C+fractured+rock%3B+application+to+Yucca+Mountain%2C+Nevada&rft.au=Robinson%2C+Bruce+A%3BChu%2C+Shaoping%3BLu%2C+Zhiming&rft.aulast=Robinson&rft.aufirst=Bruce&rft.date=2012-11-01&rft.volume=11&rft.issue=4&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Vadose+Zone+Journal&rft.issn=1539-1663&rft_id=info:doi/10.2136%2Fvzj2011.0142 L2 - http://www.vadosezonejournal.org LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2013, American Geosciences Institute. Abstract, Copyright, Soil Science Society of America | Reference includes data from GeoScienceWorld, Alexandria, VA, United States N1 - Date revised - 2013-01-01 N1 - Number of references - 63 N1 - PubXState - WI N1 - Document feature - illus. N1 - SuppNotes - Includes appendix; supplemental information/data is available in the online version of this article N1 - Last updated - 2013-01-17 N1 - SubjectsTermNotLitGenreText - actinides; advection; applications; Calico Hills Formation; discrete fracture model; equations; fractured materials; fracturing; igneous rocks; infiltration; isotopes; metals; movement; neptunium; Nevada; Np-237; numerical models; Nye County Nevada; permeability; plutonium; Pu-240; pyroclastics; radioactive isotopes; radioactive waste; simulation; sorption; statistical analysis; Tc-99; technetium; tracers; transport; traveltime; tuff; uncertainty; United States; unsaturated zone; volcanic rocks; waste disposal; Yucca Mountain DO - http://dx.doi.org/10.2136/vzj2011.0142 ER - TY - JOUR T1 - Field-scale assessment of desiccation implementation for deep vadose zone contaminants AN - 1270041533; 2013-009593 AB - Desiccation of the vadose zone has the potential to reduce the flux of contaminants to underlying groundwater by removing moisture and decreasing the water relative permeability of the desiccated zone. However, data to evaluate implementation of desiccation are needed before desiccation can be considered as a potential remedy. Implementation of desiccation was field tested by injecting dry nitrogen gas to a target treatment zone and monitoring the spatial and temporal progress of the drying process. Aqueous waste discharges to disposal cribs approximately 50 yr ago distributed water and contaminants, primarily technetium-99 and nitrate, within the 100-m deep vadose zone at the test site. The test was conducted adjacent to one of the former disposal cribs in a contaminated portion of the vadose zone dominated by fine sands with lenses of loamy sand. Desiccation removed over 18,000 kg of water from the test zone within the 151-d active desiccation period and reduced volumetric moisture content over 1300 m (super 3) of soil with values lower than 0.01 (m (super 3) m (super -3) ) in 68 m (super 3) . The lateral and vertical distribution of drying from the injection well was influenced by the subsurface heterogeneity with initial drying in higher permeability zones. However, over time, desiccation also occurred in the initially wetter, lower permeability lenses. JF - Vadose Zone Journal AU - Truex, M J AU - Oostrom, Mart AU - Strickland, C E AU - Chronister, G B AU - Benecke, M W AU - Johnson, C D Y1 - 2012/11// PY - 2012 DA - November 2012 PB - Soil Science Society of America, Madison, WI VL - 11 IS - 4 KW - United States KW - neutron methods KW - isotopes KW - moisture KW - reclamation KW - well-logging KW - unsaturated zone KW - remediation KW - nitrogen KW - ground water KW - radioactive isotopes KW - transport KW - tracers KW - sediments KW - nitrate ion KW - water pollution KW - technetium KW - sand KW - experimental studies KW - Washington KW - monitoring KW - gaseous phase KW - clastic sediments KW - pollutants KW - pollution KW - Hanford Site KW - Tc-99 KW - depth KW - gases KW - desiccation KW - soil pollution KW - metals KW - permeability KW - field studies KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1270041533?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Vadose+Zone+Journal&rft.atitle=Field-scale+assessment+of+desiccation+implementation+for+deep+vadose+zone+contaminants&rft.au=Truex%2C+M+J%3BOostrom%2C+Mart%3BStrickland%2C+C+E%3BChronister%2C+G+B%3BBenecke%2C+M+W%3BJohnson%2C+C+D&rft.aulast=Truex&rft.aufirst=M&rft.date=2012-11-01&rft.volume=11&rft.issue=4&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Vadose+Zone+Journal&rft.issn=1539-1663&rft_id=info:doi/10.2136%2Fvzj2011.0144 L2 - http://www.vadosezonejournal.org LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2013, American Geosciences Institute. Abstract, Copyright, Soil Science Society of America | Reference includes data from GeoScienceWorld, Alexandria, VA, United States N1 - Date revised - 2013-01-01 N1 - Number of references - 26 N1 - PubXState - WI N1 - Document feature - illus. incl. 3 tables N1 - Last updated - 2013-01-17 N1 - SubjectsTermNotLitGenreText - clastic sediments; depth; desiccation; experimental studies; field studies; gaseous phase; gases; ground water; Hanford Site; isotopes; metals; moisture; monitoring; neutron methods; nitrate ion; nitrogen; permeability; pollutants; pollution; radioactive isotopes; reclamation; remediation; sand; sediments; soil pollution; Tc-99; technetium; tracers; transport; United States; unsaturated zone; Washington; water pollution; well-logging DO - http://dx.doi.org/10.2136/vzj2011.0144 ER - TY - JOUR T1 - Geochemical and geophysical changes during ammonia gas treatment of vadose zone sediments for uranium remediation AN - 1270041531; 2013-009592 AB - Low water content sediments were treated with NH (sub 3) gas to evaluate changes in U mobility as a potential field remediation method for vadose zone contamination. Injection of NH (sub 3) gas created high dissolved NH (sub 3) concentrations that followed equilibrium behavior. High NH (sub 3) concentration led to an increase in pH from 8.0 to 11 to 13, depending on the water content and NH (sub 3) concentration. The increase in pore water pH resulted in a large increase in pore water cations and anions from mineral-phase dissolution. Minerals showing the greatest dissolution included montmorillonite, muscovite, and kaolinite. Pore water ion concentrations then decreased with time. Simulations based on initial pore water ion concentrations indicated that quartz, chrysotile, calcite, diaspore, hematite, and Na-boltwoodite (hydrous U silicate) should precipitate. Electrical resistivity and induced polarization tomography (ERT/IP) was able to nonintrusively track these NH (sub 3) partitioning, dissolution, and precipitations processes through changes in conductivity and chargeability. Ammonia treatment significantly decreases the amount of U present as adsorbed and aqueous species in field-contaminated sediments. In contrast, sediments containing a large fraction of U associated with carbonates generally showed little change. Uranium leaching from sediments containing high Na-boltwoodite decreased significantly by NH (sub 3) treatment, but x-ray absorption near-edge structure/extended x-ray absorption fine structure showed no change in the Na-boltwoodite concentration. Therefore, NH (sub 3) treatment of contaminated sediment acts to decrease the highly mobile aqueous and adsorbed U by incorporation into precipitates and appears to decrease mobility of some existing U precipitates (Na-boltwoodite) as a result of mineral coating. JF - Vadose Zone Journal AU - Szecsody, James E AU - Truex, M J AU - Zhong, Lirong AU - Johnson, Tim C AU - Qafoku, N P AU - Williams, M D AU - Greenwood, W J AU - Wallin, E L AU - Bargar, J D AU - Faurie, D K Y1 - 2012/11// PY - 2012 DA - November 2012 PB - Soil Science Society of America, Madison, WI VL - 11 IS - 4 KW - tomography KW - silicates KW - electrical conductivity KW - moisture KW - reclamation KW - muscovite KW - diaspore KW - unsaturated zone KW - remediation KW - XANES spectra KW - partitioning KW - laboratory studies KW - hydrologic cycle KW - serpentine group KW - mica group KW - hematite KW - orthosilicates KW - induced polarization KW - framework silicates KW - Benton County Washington KW - pH KW - hydrology KW - experimental studies KW - gaseous phase KW - Hanford Site KW - kaolinite KW - X-ray spectra KW - soil pollution KW - EXAFS data KW - quartz KW - uranium KW - carbonates KW - pore water KW - United States KW - silica minerals KW - techniques KW - solution KW - simulation KW - ground water KW - chrysotile KW - transport KW - quantitative analysis KW - sediments KW - reactive transport KW - oxides KW - germanates KW - spectra KW - geochemistry KW - montmorillonite KW - ammonia compound KW - water KW - Washington KW - alkali metals KW - Richland Washington KW - pollution KW - sodium KW - resistivity KW - hydrochemistry KW - boltwoodite KW - gases KW - clay minerals KW - calcite KW - nesosilicates KW - gas injection KW - precipitation KW - metals KW - sheet silicates KW - actinides KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1270041531?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Vadose+Zone+Journal&rft.atitle=Geochemical+and+geophysical+changes+during+ammonia+gas+treatment+of+vadose+zone+sediments+for+uranium+remediation&rft.au=Szecsody%2C+James+E%3BTruex%2C+M+J%3BZhong%2C+Lirong%3BJohnson%2C+Tim+C%3BQafoku%2C+N+P%3BWilliams%2C+M+D%3BGreenwood%2C+W+J%3BWallin%2C+E+L%3BBargar%2C+J+D%3BFaurie%2C+D+K&rft.aulast=Szecsody&rft.aufirst=James&rft.date=2012-11-01&rft.volume=11&rft.issue=4&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Vadose+Zone+Journal&rft.issn=1539-1663&rft_id=info:doi/10.2136%2Fvzj2011.0158 L2 - http://www.vadosezonejournal.org LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2013, American Geosciences Institute. Abstract, Copyright, Soil Science Society of America | Reference includes data from GeoScienceWorld, Alexandria, VA, United States N1 - Date revised - 2013-01-01 N1 - Number of references - 33 N1 - PubXState - WI N1 - Document feature - illus. incl. 2 tables N1 - Last updated - 2013-01-17 N1 - SubjectsTermNotLitGenreText - actinides; alkali metals; ammonia compound; Benton County Washington; boltwoodite; calcite; carbonates; chrysotile; clay minerals; diaspore; electrical conductivity; EXAFS data; experimental studies; framework silicates; gas injection; gaseous phase; gases; geochemistry; germanates; ground water; Hanford Site; hematite; hydrochemistry; hydrologic cycle; hydrology; induced polarization; kaolinite; laboratory studies; metals; mica group; moisture; montmorillonite; muscovite; nesosilicates; orthosilicates; oxides; partitioning; pH; pollution; pore water; precipitation; quantitative analysis; quartz; reactive transport; reclamation; remediation; resistivity; Richland Washington; sediments; serpentine group; sheet silicates; silica minerals; silicates; simulation; sodium; soil pollution; solution; spectra; techniques; tomography; transport; United States; unsaturated zone; uranium; Washington; water; X-ray spectra; XANES spectra DO - http://dx.doi.org/10.2136/vzj2011.0158 ER - TY - JOUR T1 - Geophysical monitoring of foam used to deliver remediation treatments within the vadose zone AN - 1270041529; 2013-009591 AB - Foam is a promising vehicle for delivering amendments into the vadose zone for in situ remediation; it is an approach being considered for in situ treatment and stabilization of metals and radionuclides located within the deep vadose zone of the Department of Energy's Hanford Site in the state of Washington. A central aspect of evaluating the effectiveness of this approach is the ability to monitor foam distribution, its transformation, and the reactions that it induces in the subsurface, ideally in a noninvasive manner. In this study, we performed laboratory experiments to evaluate the potential of geophysical methods (complex resistivity and time-domain reflectometry [TDR]) as tools for monitoring foam-assisted amendment delivery in the deep vadose zone. Our results indicated great sensitivity of electrical methods to foam transportation and evolution in unsaturated porous media that were related to foam bubble coalescence and drainage processes. Specifically, we observed (i) a decrease in electrical resistivity (increase in electrical conductivity) by more than an order of magnitude in both silica sand and natural sediment matrices during foam transportation; (ii) an increase in resistivity (decrease in conductivity) of more than twofold during foam coalescence and drainage; and (iii) a distinct phase and imaginary conductivity signature related to the evolution of water films on sediment grains during foam injection and evolution processes. To assist with the interpretation of these data, TDR measurements were used to monitor moisture content, which provided complementary information about foam distribution and drainage. Our results clearly demonstrated the sensitivity of electrical and TDR signals to foam transportation and evolution in unsaturated porous media and suggest the potential of these methods for monitoring the response of a system to foam-based remediation treatments at field scales. JF - Vadose Zone Journal AU - Wu, Yuxin AU - Hubbard, Susan S AU - Wellman, Dawn M Y1 - 2012/11// PY - 2012 DA - November 2012 PB - Soil Science Society of America, Madison, WI VL - 11 IS - 4 KW - United States KW - moisture KW - reclamation KW - unsaturated zone KW - techniques KW - hydrogeology KW - remediation KW - laboratory studies KW - conductivity KW - silica KW - sediments KW - electromagnetic methods KW - induced polarization KW - time domain reflectometry KW - sand KW - experimental studies KW - Washington KW - monitoring KW - in situ KW - clastic sediments KW - geophysical methods KW - electrical methods KW - bubbles KW - Hanford Site KW - porous materials KW - resistivity KW - metals KW - foam KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1270041529?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Vadose+Zone+Journal&rft.atitle=Geophysical+monitoring+of+foam+used+to+deliver+remediation+treatments+within+the+vadose+zone&rft.au=Wu%2C+Yuxin%3BHubbard%2C+Susan+S%3BWellman%2C+Dawn+M&rft.aulast=Wu&rft.aufirst=Yuxin&rft.date=2012-11-01&rft.volume=11&rft.issue=4&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Vadose+Zone+Journal&rft.issn=1539-1663&rft_id=info:doi/10.2136%2Fvzj2011.0160 L2 - http://www.vadosezonejournal.org LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2013, American Geosciences Institute. Abstract, Copyright, Soil Science Society of America | Reference includes data from GeoScienceWorld, Alexandria, VA, United States N1 - Date revised - 2013-01-01 N1 - Number of references - 42 N1 - PubXState - WI N1 - Document feature - illus. N1 - Last updated - 2013-01-17 N1 - SubjectsTermNotLitGenreText - bubbles; clastic sediments; conductivity; electrical methods; electromagnetic methods; experimental studies; foam; geophysical methods; Hanford Site; hydrogeology; in situ; induced polarization; laboratory studies; metals; moisture; monitoring; porous materials; reclamation; remediation; resistivity; sand; sediments; silica; techniques; time domain reflectometry; United States; unsaturated zone; Washington DO - http://dx.doi.org/10.2136/vzj2011.0160 ER - TY - JOUR T1 - Numerical evaluation of effective unsaturated hydraulic properties of fractured rocks using a stochastic continuum approach AN - 1270041527; 2013-009590 AB - This study builds on past studies that have investigated the effective properties of unsaturated porous media and merges stochastic continuum concepts to develop a numerical procedure for estimating the effective flow parameters that are independent of pressure head or saturation. The procedure involves the development of a numerical permeameter based on randomly generated, spatially correlated fields of fundamental fracture properties such as spacing and aperture. Local values of hydraulic conductivity, and the van Genuchten fitting parameters alpha and n in this random field are computed from local values of mechanical aperture and spacing based on the cubic law and relationships established from pore-scale fracture simulations. By considering multiple realizations of these spatially correlated fields and by running the numerical permeameter over a range of effective saturations and flow rates, outputs are generated that can be fit with the standard van Genuchten model to estimate block effective values of saturated hydraulic conductivity and the van Genuchten unsaturated hydraulic parameters of a fracture continuum at the field scale. These parameters can then be incorporated to conventional numerical simulators originally developed for porous media. The study shows that reasonable approximations to the results obtained through computationally demanding stochastic simulations can be developed based on estimates of the mean fracture spacing and aperture. Although the example application assumes the presence of an impermeable rock matrix, the hydraulic properties estimated for the fracture continuum with this methodology can be combined with those measured or similarly estimated for a matrix continuum in dual-permeability continuum models. JF - Vadose Zone Journal AU - Lu, Zhiming AU - Kwicklis, Edward M Y1 - 2012/11// PY - 2012 DA - November 2012 PB - Soil Science Society of America, Madison, WI VL - 11 IS - 4 KW - United States KW - scale factor KW - fractured materials KW - volcanic rocks KW - stochastic continuum KW - igneous rocks KW - unsaturated zone KW - simulation KW - Nevada Test Site KW - fractures KW - stochastic processes KW - hydrodynamics KW - tuff KW - Yucca Mountain KW - Nevada KW - well logs KW - numerical models KW - Monte Carlo analysis KW - statistical analysis KW - porous materials KW - correlation KW - equations KW - Nye County Nevada KW - pyroclastics KW - boreholes KW - heterogeneous materials KW - hydraulic conductivity KW - permeability KW - 21:Hydrogeology KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1270041527?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Vadose+Zone+Journal&rft.atitle=Numerical+evaluation+of+effective+unsaturated+hydraulic+properties+of+fractured+rocks+using+a+stochastic+continuum+approach&rft.au=Lu%2C+Zhiming%3BKwicklis%2C+Edward+M&rft.aulast=Lu&rft.aufirst=Zhiming&rft.date=2012-11-01&rft.volume=11&rft.issue=4&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Vadose+Zone+Journal&rft.issn=1539-1663&rft_id=info:doi/10.2136%2Fvzj2011.0164 L2 - http://www.vadosezonejournal.org LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2013, American Geosciences Institute. Abstract, Copyright, Soil Science Society of America | Reference includes data from GeoScienceWorld, Alexandria, VA, United States N1 - Date revised - 2013-01-01 N1 - Number of references - 22 N1 - PubXState - WI N1 - Document feature - illus. N1 - Last updated - 2013-01-17 N1 - SubjectsTermNotLitGenreText - boreholes; correlation; equations; fractured materials; fractures; heterogeneous materials; hydraulic conductivity; hydrodynamics; igneous rocks; Monte Carlo analysis; Nevada; Nevada Test Site; numerical models; Nye County Nevada; permeability; porous materials; pyroclastics; scale factor; simulation; statistical analysis; stochastic continuum; stochastic processes; tuff; United States; unsaturated zone; volcanic rocks; well logs; Yucca Mountain DO - http://dx.doi.org/10.2136/vzj2011.0164 ER - TY - JOUR T1 - LNAPL removal from unsaturated porous media using surfactant infiltration AN - 1270041526; 2013-009589 AB - A series of unsaturated column experiments was conducted to evaluate light nonaqueous phase liquid (LNAPL) removal during surfactant solution infiltration. Surfactant-LNAPL phase behavior tests were conducted to optimize the remedial solutions. Packed sand and site sediment columns were first processed to establish representative LNAPL smear zones under unsaturated conditions. Infiltration of low-concentration surfactant was then applied in a stepwise flush mode, with 0.33 column pore volume (PV) of solution in each flush. The influence of infiltrated surfactant solution volume and pH on LNAPL removal was assessed. A LNAPL bank was observed at the front of the first surfactant infiltration in each column, indicating that a very low surfactant concentration is needed to reduce the LNAPL-water interfacial tension sufficiently to mobilize trapped LNAPL under unsaturated conditions. More LNAPL was recovered as additional steps of surfactant infiltration were applied. Up to 99% LNAPL was removed after six infiltration steps, with approximately 2.0 PV of total surfactant solution application, suggesting surfactant infiltration may be an effective method for vadose zone LNAPL remediation. The influence of pH tested in this study (3.99 approximately 10.85) was insignificant because the buffering capacity of the sediment kept the pH in the column higher than the zero point charge (pH (sub zp) ) of the sediment and therefore surfactant sorption was negligible. JF - Vadose Zone Journal AU - Zhong, Lirong AU - Oostrom, Mart Y1 - 2012/11// PY - 2012 DA - November 2012 PB - Soil Science Society of America, Madison, WI VL - 11 IS - 4 KW - United States KW - solutions KW - reclamation KW - dye tracers KW - unsaturated zone KW - light nonaqueous phase liquids KW - remediation KW - Ottawa Sand KW - stepwise flush technique KW - laboratory studies KW - Hamilton County Ohio KW - sediments KW - Cincinnati Ohio KW - alcohols KW - polymers KW - pH KW - Ohio KW - sand KW - experimental studies KW - clastic sediments KW - effluents KW - porous materials KW - petroleum products KW - nonaqueous phase liquids KW - organic compounds KW - saturation KW - infiltration KW - surfactants KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1270041526?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Vadose+Zone+Journal&rft.atitle=LNAPL+removal+from+unsaturated+porous+media+using+surfactant+infiltration&rft.au=Zhong%2C+Lirong%3BOostrom%2C+Mart&rft.aulast=Zhong&rft.aufirst=Lirong&rft.date=2012-11-01&rft.volume=11&rft.issue=4&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Vadose+Zone+Journal&rft.issn=1539-1663&rft_id=info:doi/10.2136%2Fvzj2011.0166 L2 - http://www.vadosezonejournal.org LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2013, American Geosciences Institute. Abstract, Copyright, Soil Science Society of America | Reference includes data from GeoScienceWorld, Alexandria, VA, United States N1 - Date revised - 2013-01-01 N1 - Number of references - 39 N1 - PubXState - WI N1 - Document feature - illus. incl. 4 tables N1 - Last updated - 2013-01-17 N1 - SubjectsTermNotLitGenreText - alcohols; Cincinnati Ohio; clastic sediments; dye tracers; effluents; experimental studies; Hamilton County Ohio; infiltration; laboratory studies; light nonaqueous phase liquids; nonaqueous phase liquids; Ohio; organic compounds; Ottawa Sand; petroleum products; pH; polymers; porous materials; reclamation; remediation; sand; saturation; sediments; solutions; stepwise flush technique; surfactants; United States; unsaturated zone DO - http://dx.doi.org/10.2136/vzj2011.0166 ER - TY - JOUR T1 - An experimental study of diffusivity of technetium-99 in Hanford vadose zone sediments AN - 1270041402; 2013-009562 AB - One of the methods being considered at the Hanford site in the state of Washington for safely disposing of low-level radioactive wastes (LLW) is to encase the waste in concrete and entomb the packages in the Hanford vadose zone sediments. The current plan for waste isolation consists of stacking low-level waste packages on a trench floor, surrounding the stacks with reinforced steel, and encasing these packages with concrete. Any failure of the concrete encasement may result in water intrusion and consequent mobilization of radionuclides from the waste packages. The mobilized radionuclides may escape from the encased concrete by mass flow or diffusion and move into the surrounding subsurface sediments. It is therefore necessary to conduct an assessment of the performance of the concrete encasement structure and the surrounding soil's ability to retard radionuclide migration. Because of their anionic nature in aqueous solutions, the radionuclides, (super 99) Tc and (super 129) I were identified as long-term dose contributors in LLW. The leachability or diffusion of these radionuclide species must be measured to assess the long-term performance of waste grouts when contacted with vadose zone pore water or groundwater. To supplement the previously obtained data, a set of experiments were conducted using (super 99) Tc-spiked concrete (with 0 or 4% metallic Fe additions) in contact with Hanford soil at extremely low moisture content ( approximately 1% by mass). The (super 99) Tc diffusion profiles in the soil half-cells were measured after a time lapse of approximately 1.9 yr and the diffusion coefficient was calculated to be approximately 1.0X10 (super -9) cm (super 2) s (super -1) . JF - Vadose Zone Journal AU - Mattigod, Shas V AU - Bovaird, Chase C AU - Wellman, Dawn M AU - Parker, Kent E AU - Wood, Marc I Y1 - 2012/11// PY - 2012 DA - November 2012 PB - Soil Science Society of America, Madison, WI VL - 11 IS - 4 KW - United States KW - isotopes KW - moisture KW - unsaturated zone KW - aqueous solutions KW - iron KW - cores KW - radioactive waste KW - laboratory studies KW - radioactive isotopes KW - transport KW - sediments KW - construction materials KW - diffusivity KW - soils KW - technetium KW - experimental studies KW - Washington KW - Hanford Site KW - Tc-99 KW - equations KW - concrete KW - metals KW - waste disposal KW - low-level waste KW - 02D:Isotope geochemistry KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1270041402?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Vadose+Zone+Journal&rft.atitle=An+experimental+study+of+diffusivity+of+technetium-99+in+Hanford+vadose+zone+sediments&rft.au=Mattigod%2C+Shas+V%3BBovaird%2C+Chase+C%3BWellman%2C+Dawn+M%3BParker%2C+Kent+E%3BWood%2C+Marc+I&rft.aulast=Mattigod&rft.aufirst=Shas&rft.date=2012-11-01&rft.volume=11&rft.issue=4&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Vadose+Zone+Journal&rft.issn=1539-1663&rft_id=info:doi/10.2136%2Fvzj2011.0184 L2 - http://www.vadosezonejournal.org LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2013, American Geosciences Institute. Abstract, Copyright, Soil Science Society of America | Reference includes data from GeoScienceWorld, Alexandria, VA, United States N1 - Date revised - 2013-01-01 N1 - Number of references - 18 N1 - PubXState - WI N1 - Document feature - illus. incl. 1 table N1 - Last updated - 2013-01-17 N1 - SubjectsTermNotLitGenreText - aqueous solutions; concrete; construction materials; cores; diffusivity; equations; experimental studies; Hanford Site; iron; isotopes; laboratory studies; low-level waste; metals; moisture; radioactive isotopes; radioactive waste; sediments; soils; Tc-99; technetium; transport; United States; unsaturated zone; Washington; waste disposal DO - http://dx.doi.org/10.2136/vzj2011.0184 ER - TY - JOUR T1 - Characterization of a contaminated wellfield using 3D electrical resistivity tomography implemented with geostatistical, discontinuous boundary, and known conductivity constraints AN - 1270039759; 2013-010843 AB - Continuing advancements in subsurface electrical resistivity tomography (ERT) are increasing its capabilities for understanding shallow subsurface properties and processes. The inability of ERT imaging data to resolve unique subsurface structures and the corresponding need to include constraining information remains one of the greatest limitations, yet provides one of the greatest opportunities for further advancing the utility of the method. We propose a new method of incorporating constraining information into an ERT imaging algorithm in the form of discontinuous boundaries, known values, and spatial covariance information. We demonstrated the approach by imaging a uranium-contaminated wellfield at the Hanford Site in southeastern Washington State, USA. We incorporate into the algorithm known boundary information and spatial covariance structures derived from the highly resolved near-borehole regions of a regularized ERT inversion. The resulting inversion provides a solution which fits the ERT data (given the estimated noise level), honors the spatial covariance structure throughout the model, and is consistent with known bulk-conductivity discontinuities. The results are validated with core-scale measurements, indicating a significant improvement in accuracy over the standard regularized inversion and revealing important subsurface structure known to influence flow and transport at the site. JF - Geophysics AU - Johnson, Timothy C AU - Versteeg, Roelof J AU - Rockhold, Mark AU - Slater, Lee D AU - Ntarlagiannis, Dimitrios AU - Greenwood, William J AU - Zachara, John Y1 - 2012/11/01/ PY - 2012 DA - 2012 Nov 01 SP - EN85 EP - EN96 PB - Society of Exploration Geophysicists, Tulsa, OK VL - 77 IS - 6 SN - 0016-8033, 0016-8033 KW - United States KW - tomography KW - imagery KW - Washington KW - geophysical surveys KW - geophysical methods KW - electrical methods KW - waste disposal sites KW - pollution KW - Hanford Site KW - resistivity KW - radioactive waste KW - boreholes KW - metals KW - surveys KW - applications KW - uranium KW - Benton County Washington KW - waste disposal KW - actinides KW - 20:Applied geophysics KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1270039759?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Geophysics&rft.atitle=Characterization+of+a+contaminated+wellfield+using+3D+electrical+resistivity+tomography+implemented+with+geostatistical%2C+discontinuous+boundary%2C+and+known+conductivity+constraints&rft.au=Johnson%2C+Timothy+C%3BVersteeg%2C+Roelof+J%3BRockhold%2C+Mark%3BSlater%2C+Lee+D%3BNtarlagiannis%2C+Dimitrios%3BGreenwood%2C+William+J%3BZachara%2C+John&rft.aulast=Johnson&rft.aufirst=Timothy&rft.date=2012-11-01&rft.volume=77&rft.issue=6&rft.spage=EN85&rft.isbn=&rft.btitle=&rft.title=Geophysics&rft.issn=00168033&rft_id=info:doi/10.1190%2Fgeo2012-0121.1 L2 - http://library.seg.org/journal/gpysa7 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2013, American Geosciences Institute. Reference includes data from GeoScienceWorld, Alexandria, VA, United States | Reference includes data supplied by Society of Exploration Geophysicists, Tulsa, OK, United States N1 - Date revised - 2013-01-01 N1 - Number of references - 51 N1 - PubXState - OK N1 - Document feature - illus. N1 - Last updated - 2013-06-13 N1 - CODEN - GPYSA7 N1 - SubjectsTermNotLitGenreText - actinides; applications; Benton County Washington; boreholes; electrical methods; geophysical methods; geophysical surveys; Hanford Site; imagery; metals; pollution; radioactive waste; resistivity; surveys; tomography; United States; uranium; Washington; waste disposal; waste disposal sites DO - http://dx.doi.org/10.1190/geo2012-0121.1 ER - TY - JOUR T1 - Investigation of aerosol indirect effects on simulated flash-flood heavy rainfall over Korea AN - 1257753175; 17443689 AB - This study investigates aerosol indirect effects on the development of heavy rainfall near Seoul, South Korea, on 12 July 2006, focusing on precipitation amount. The impact of the aerosol concentration on simulated precipitation is evaluated by varying the initial cloud condensation nuclei (CCN) number concentration in the Weather Research and Forecasting (WRF) Double-Moment 6-class (WDM6) microphysics scheme. The simulations are performed under clean, semi-polluted, and polluted conditions. Detailed analysis of the physical processes that are responsible for surface precipitation, including moisture and cloud microphysical budgets shows enhanced ice-phase processes to be the primary driver of increased surface precipitation under the semi-polluted condition. Under the polluted condition, suppressed auto-conversion and the enhanced evaporation of rain cause surface precipitation to decrease. To investigate the role of environmental conditions on precipitation response under different aerosol number concentrations, a set of sensitivity experiments are conducted with a 5 % decrease in relative humidity at the initial time, relative to the base simulations. Results show ice-phase processes having small sensitivity to CCN number concentration, compared with the base simulations. Surface precipitation responds differently to CCN number concentration under the lower humidity initial condition, being greatest under the clean condition, followed by the semi-polluted and polluted conditions. JF - Meteorology and Atmospheric Physics AU - Lim, Kyo-Sun Sunny AU - Hong, Song-You AD - Pacific Northwest National Laboratory, Richland, WA, USA, shong@yonsei.ac.kr Y1 - 2012/11// PY - 2012 DA - November 2012 SP - 199 EP - 214 PB - Springer Science+Business Media, Van Godewijckstraat 30 Dordrecht 3311 GX Netherlands VL - 118 IS - 3-4 SN - 0177-7971, 0177-7971 KW - Aqualine Abstracts; Water Resources Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources; Meteorological & Geoastrophysical Abstracts KW - Prediction KW - Relative humidity KW - Evaporation KW - Rainfall KW - Relative Humidity KW - Heavy rainfall KW - Korea, Rep. KW - Initial conditions KW - Weather forecasting KW - Aerosol concentration KW - Weather KW - Aerosols KW - Bases KW - Humidity KW - Precipitation KW - Cloud condensation nuclei KW - Clouds KW - Numerical simulations KW - Condensation KW - Environmental conditions KW - Korea, Rep., Seoul KW - Pollution control KW - AQ 00001:Water Resources and Supplies KW - SW 0810:General KW - Q2 09402:Freshwater from the sea KW - M2 556.13:Evaporation/Evapotranspiration (556.13) UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1257753175?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aaqualine&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Meteorology+and+Atmospheric+Physics&rft.atitle=Investigation+of+aerosol+indirect+effects+on+simulated+flash-flood+heavy+rainfall+over+Korea&rft.au=Lim%2C+Kyo-Sun+Sunny%3BHong%2C+Song-You&rft.aulast=Lim&rft.aufirst=Kyo-Sun&rft.date=2012-11-01&rft.volume=118&rft.issue=3-4&rft.spage=199&rft.isbn=&rft.btitle=&rft.title=Meteorology+and+Atmospheric+Physics&rft.issn=01777971&rft_id=info:doi/10.1007%2Fs00703-012-0216-6 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2012-12-01 N1 - Last updated - 2016-12-22 N1 - SubjectsTermNotLitGenreText - Clouds; Relative humidity; Prediction; Aerosols; Rainfall; Humidity; Environmental conditions; Weather forecasting; Pollution control; Aerosol concentration; Heavy rainfall; Numerical simulations; Evaporation; Precipitation; Initial conditions; Cloud condensation nuclei; Weather; Bases; Condensation; Relative Humidity; Korea, Rep.; Korea, Rep., Seoul DO - http://dx.doi.org/10.1007/s00703-012-0216-6 ER - TY - CPAPER T1 - Cu-SSZ-13 Catalysts for the Selective Catalytic Reduction of NOx with NH3: Catalyst Characterization and Reaction Mechanisms T2 - 2012 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2012) AN - 1313121084; 6165897 JF - 2012 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2012) AU - Peden, Charles AU - Kwak, Ja AU - Gao, Feng AU - Szanyi, Janos AU - Lee, Jong-Hwan Y1 - 2012/10/28/ PY - 2012 DA - 2012 Oct 28 KW - Catalysts KW - Nitrogen compounds KW - Oxides KW - Reaction mechanisms UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313121084?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2009+IEEE+Nuclear+Science+Symposium+and+Medical+Imaging+Conference&rft.atitle=Design+and+Implementation+of+a+Radiation+Portal+Monitor+Multi-Lane+Simulator&rft.au=McKinnon%2C+A%3BBass%2C+R%3BElder%2C+M%3BJohnson%2C+M&rft.aulast=McKinnon&rft.aufirst=A&rft.date=2009-10-25&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2009+IEEE+Nuclear+Science+Symposium+and+Medical+Imaging+Conference&rft.issn=&rft_id=info:doi/ L2 - https://aiche.confex.com/aiche/2012/webprogram/start.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Production of Hydroxymethylfurfural From Sugars or Renewable Biomass Feedstock As a Potential Platform Intermediate for Bio-Plastics T2 - 2012 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2012) AN - 1313110820; 6167597 JF - 2012 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2012) AU - Liu, Wei Y1 - 2012/10/28/ PY - 2012 DA - 2012 Oct 28 KW - Biomass KW - Sugar UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313110820?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2012+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2012%29&rft.atitle=Production+of+Hydroxymethylfurfural+From+Sugars+or+Renewable+Biomass+Feedstock+As+a+Potential+Platform+Intermediate+for+Bio-Plastics&rft.au=Liu%2C+Wei&rft.aulast=Liu&rft.aufirst=Wei&rft.date=2012-10-28&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2012%29&rft.issn=&rft_id=info:doi/ L2 - https://aiche.confex.com/aiche/2012/webprogram/start.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Thin Flat Sheet Molecular Sieve Membranes for Air Drying and Energy Recovery of Building Ventilation T2 - 2012 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2012) AN - 1313109479; 6168366 JF - 2012 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2012) AU - Liu, Wei Y1 - 2012/10/28/ PY - 2012 DA - 2012 Oct 28 KW - Ventilation KW - Membranes KW - Energy recovery KW - Drying UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313109479?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2012+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2012%29&rft.atitle=Thin+Flat+Sheet+Molecular+Sieve+Membranes+for+Air+Drying+and+Energy+Recovery+of+Building+Ventilation&rft.au=Liu%2C+Wei&rft.aulast=Liu&rft.aufirst=Wei&rft.date=2012-10-28&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2012%29&rft.issn=&rft_id=info:doi/ L2 - https://aiche.confex.com/aiche/2012/webprogram/start.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Improve the Mass Transfer to Graphite Electrode Through Cell Design in Vanadium Redox Flow Batteries T2 - 2012 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2012) AN - 1313104866; 6170686 JF - 2012 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2012) AU - Chen, Feng Y1 - 2012/10/28/ PY - 2012 DA - 2012 Oct 28 KW - Electrodes KW - Batteries KW - Vanadium KW - Redox reactions KW - Graphite KW - Mass transfer UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313104866?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2012+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2012%29&rft.atitle=Improve+the+Mass+Transfer+to+Graphite+Electrode+Through+Cell+Design+in+Vanadium+Redox+Flow+Batteries&rft.au=Chen%2C+Feng&rft.aulast=Chen&rft.aufirst=Feng&rft.date=2012-10-28&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2012%29&rft.issn=&rft_id=info:doi/ L2 - https://aiche.confex.com/aiche/2012/webprogram/start.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - In Situ Investigation of Vanadium Ions Transport in Redox Flow Battery T2 - 2012 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2012) AN - 1313101692; 6168158 JF - 2012 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2012) AU - Luo, Qingtao AU - Li, Liyu AU - Nie, Zimin AU - Wang, Wei AU - Wei, Xiaoliang AU - Chen, Feng AU - Li, Bin AU - Xia, Guanguang AU - Chen, Baowei AU - Yang, Gary AU - Vincent, Sprenkle Y1 - 2012/10/28/ PY - 2012 DA - 2012 Oct 28 KW - Batteries KW - Ion transport KW - Vanadium KW - Redox reactions KW - Ions UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313101692?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2012+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2012%29&rft.atitle=In+Situ+Investigation+of+Vanadium+Ions+Transport+in+Redox+Flow+Battery&rft.au=Luo%2C+Qingtao%3BLi%2C+Liyu%3BNie%2C+Zimin%3BWang%2C+Wei%3BWei%2C+Xiaoliang%3BChen%2C+Feng%3BLi%2C+Bin%3BXia%2C+Guanguang%3BChen%2C+Baowei%3BYang%2C+Gary%3BVincent%2C+Sprenkle&rft.aulast=Luo&rft.aufirst=Qingtao&rft.date=2012-10-28&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2012%29&rft.issn=&rft_id=info:doi/ L2 - https://aiche.confex.com/aiche/2012/webprogram/start.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Microporous Separators On Fe/V Redox Flow Battery: A Valuable Opportunity for Cost Reduction T2 - 2012 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2012) AN - 1313101667; 6168157 JF - 2012 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2012) AU - Wei, Xiaoliang AU - Luo, Qingtao AU - Li, Bin AU - Nie, Zimin AU - Shao, Yuyan AU - Chen, Feng AU - Chen, Baowei AU - Xia, Guanguang AU - Li, Liyu AU - Yang, Zhenguo AU - Wang, Wei Y1 - 2012/10/28/ PY - 2012 DA - 2012 Oct 28 KW - Economics KW - Batteries KW - Redox reactions KW - Separators UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313101667?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2012+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2012%29&rft.atitle=Microporous+Separators+On+Fe%2FV+Redox+Flow+Battery%3A+A+Valuable+Opportunity+for+Cost+Reduction&rft.au=Wei%2C+Xiaoliang%3BLuo%2C+Qingtao%3BLi%2C+Bin%3BNie%2C+Zimin%3BShao%2C+Yuyan%3BChen%2C+Feng%3BChen%2C+Baowei%3BXia%2C+Guanguang%3BLi%2C+Liyu%3BYang%2C+Zhenguo%3BWang%2C+Wei&rft.aulast=Wei&rft.aufirst=Xiaoliang&rft.date=2012-10-28&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2012%29&rft.issn=&rft_id=info:doi/ L2 - https://aiche.confex.com/aiche/2012/webprogram/start.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Harvesting of Pure Water From Air and Combustion Exhaust Gas by Membrane Pervaporation T2 - 2012 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2012) AN - 1313094632; 6166442 JF - 2012 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2012) AU - Liu, Wei Y1 - 2012/10/28/ PY - 2012 DA - 2012 Oct 28 KW - Combustion KW - Harvesting KW - Membranes KW - Exhaust emissions UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313094632?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2012+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2012%29&rft.atitle=Harvesting+of+Pure+Water+From+Air+and+Combustion+Exhaust+Gas+by+Membrane+Pervaporation&rft.au=Liu%2C+Wei&rft.aulast=Liu&rft.aufirst=Wei&rft.date=2012-10-28&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2012%29&rft.issn=&rft_id=info:doi/ L2 - https://aiche.confex.com/aiche/2012/webprogram/start.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Electrolyte Optimization for Fe/V Redox Flow Battery System T2 - 2012 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2012) AN - 1313081851; 6168159 JF - 2012 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2012) AU - Li, Bin AU - Wang, Wei AU - Nie, Zimin AU - Sprenkle, Vincent AU - Chen, Baowei AU - Wei, Xiaoliang AU - Luo, Qingtao AU - Xia, Guanguang AU - Li, Liyu AU - Yang, Zhenguo Y1 - 2012/10/28/ PY - 2012 DA - 2012 Oct 28 KW - Batteries KW - Electrolytes KW - Redox reactions UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313081851?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2009+Annual+Meeting+of+the+Geology+Society+of+America&rft.atitle=A+Wiki-Based+Rock+Properties+Catalog+for+Geologic+co2+Sequestration+Modeling&rft.au=Rockhold%2C+Mark%3BDevoto%2C+Colleen%3BSullivan%2C+Charlotte%3BWurstner%2C+Signe&rft.aulast=Rockhold&rft.aufirst=Mark&rft.date=2009-10-18&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2009+Annual+Meeting+of+the+Geology+Society+of+America&rft.issn=&rft_id=info:doi/ L2 - https://aiche.confex.com/aiche/2012/webprogram/start.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Hydrodeoxygenation of Biomass-Derived Compounds to Biofuels T2 - 2012 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2012) AN - 1313078699; 6167278 JF - 2012 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2012) AU - Wang, Yong AU - Sun, Junming AU - Karim, Ayman AU - Zhang, He AU - Kovarik Sr, Libor AU - Wei, Zhehao AU - Li, Xiaohong Y1 - 2012/10/28/ PY - 2012 DA - 2012 Oct 28 KW - Fuel technology KW - Biofuels UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313078699?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2012+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2012%29&rft.atitle=Hydrodeoxygenation+of+Biomass-Derived+Compounds+to+Biofuels&rft.au=Wang%2C+Yong%3BSun%2C+Junming%3BKarim%2C+Ayman%3BZhang%2C+He%3BKovarik+Sr%2C+Libor%3BWei%2C+Zhehao%3BLi%2C+Xiaohong&rft.aulast=Wang&rft.aufirst=Yong&rft.date=2012-10-28&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2012%29&rft.issn=&rft_id=info:doi/ L2 - https://aiche.confex.com/aiche/2012/webprogram/start.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Conversion of Bio- Derived Ethanol to Jet Fuel Range Hydrocarbon T2 - 2012 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2012) AN - 1313063783; 6166090 JF - 2012 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2012) AU - Ramasamy, Karthikeyan AU - Wang, Yong Y1 - 2012/10/28/ PY - 2012 DA - 2012 Oct 28 KW - Ethanol KW - Fuels KW - Hydrocarbons UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313063783?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2012+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2012%29&rft.atitle=Conversion+of+Bio-+Derived+Ethanol+to+Jet+Fuel+Range+Hydrocarbon&rft.au=Ramasamy%2C+Karthikeyan%3BWang%2C+Yong&rft.aulast=Ramasamy&rft.aufirst=Karthikeyan&rft.date=2012-10-28&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2012%29&rft.issn=&rft_id=info:doi/ L2 - https://aiche.confex.com/aiche/2012/webprogram/start.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - A Sub-Grid Model for an Array of Immersed Cylinders in Coarse-Grid Multiphase Flow Simulations of a Carbon Capture Device T2 - 2012 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2012) AN - 1313046059; 6170513 JF - 2012 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2012) AU - Sarkar, Avik AU - Sun, Xin AU - Sundaresan, Sankaran Y1 - 2012/10/28/ PY - 2012 DA - 2012 Oct 28 KW - Simulation KW - Cylinders KW - Multiphase flow KW - Carbon KW - Models UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313046059?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2012+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2012%29&rft.atitle=A+Sub-Grid+Model+for+an+Array+of+Immersed+Cylinders+in+Coarse-Grid+Multiphase+Flow+Simulations+of+a+Carbon+Capture+Device&rft.au=Sarkar%2C+Avik%3BSun%2C+Xin%3BSundaresan%2C+Sankaran&rft.aulast=Sarkar&rft.aufirst=Avik&rft.date=2012-10-28&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2012%29&rft.issn=&rft_id=info:doi/ L2 - https://aiche.confex.com/aiche/2012/webprogram/start.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - First-Principles Characterization of Electronic Structure and Transport of e-/h+ Polaron Defects in Oxides: Application to TiO2 T2 - 2012 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2012) AN - 1313038844; 6166333 JF - 2012 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2012) AU - Dupuis, Michel AU - Deskins, N AU - Rousseau, Roger Y1 - 2012/10/28/ PY - 2012 DA - 2012 Oct 28 KW - Defects KW - oxides KW - Hydrogen UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313038844?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2012+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2012%29&rft.atitle=First-Principles+Characterization+of+Electronic+Structure+and+Transport+of+e-%2Fh%2B+Polaron+Defects+in+Oxides%3A+Application+to+TiO2&rft.au=Dupuis%2C+Michel%3BDeskins%2C+N%3BRousseau%2C+Roger&rft.aulast=Dupuis&rft.aufirst=Michel&rft.date=2012-10-28&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2012%29&rft.issn=&rft_id=info:doi/ L2 - https://aiche.confex.com/aiche/2012/webprogram/start.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Microchannel Rapid Temperature Swing Adsorption of CO2 for Methane Production T2 - 2012 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2012) AN - 1313029198; 6169271 JF - 2012 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2012) AU - Brooks, Kriston AU - Rassat, Scot AU - Humble, Paul Y1 - 2012/10/28/ PY - 2012 DA - 2012 Oct 28 KW - Methane KW - Temperature effects KW - Adsorption KW - Carbon dioxide UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313029198?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2012+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2012%29&rft.atitle=Microchannel+Rapid+Temperature+Swing+Adsorption+of+CO2+for+Methane+Production&rft.au=Brooks%2C+Kriston%3BRassat%2C+Scot%3BHumble%2C+Paul&rft.aulast=Brooks&rft.aufirst=Kriston&rft.date=2012-10-28&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2009+Annual+Meeting+of+the+Geology+Society+of+America&rft.issn=&rft_id=info:doi/ L2 - https://aiche.confex.com/aiche/2012/webprogram/start.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Rheological Modification On Nuclear Waste Simulant Slurries: Correlation Between Physicochemical Characteristics and Rheological Modification T2 - 2012 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2012) AN - 1313012686; 6167713 JF - 2012 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2012) AU - Chun, Jaehun AU - Bredt, Paul Y1 - 2012/10/28/ PY - 2012 DA - 2012 Oct 28 KW - Physicochemical properties KW - Slurries KW - Radioactive wastes KW - Wastes UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313012686?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2012+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2012%29&rft.atitle=Rheological+Modification+On+Nuclear+Waste+Simulant+Slurries%3A+Correlation+Between+Physicochemical+Characteristics+and+Rheological+Modification&rft.au=Chun%2C+Jaehun%3BBredt%2C+Paul&rft.aulast=Chun&rft.aufirst=Jaehun&rft.date=2012-10-28&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2012%29&rft.issn=&rft_id=info:doi/ L2 - https://aiche.confex.com/aiche/2012/webprogram/start.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Sorption, Transport, and Catalytic Transformations of Hydrocarbon in Zeolites T2 - 2012 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2012) AN - 1313010210; 6170555 JF - 2012 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2012) AU - Lercher, Johannes Y1 - 2012/10/28/ PY - 2012 DA - 2012 Oct 28 KW - Sorption KW - Zeolite KW - Hydrocarbons KW - Transformation UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313010210?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2012+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2012%29&rft.atitle=Sorption%2C+Transport%2C+and+Catalytic+Transformations+of+Hydrocarbon+in+Zeolites&rft.au=Lercher%2C+Johannes&rft.aulast=Lercher&rft.aufirst=Johannes&rft.date=2012-10-28&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2012%29&rft.issn=&rft_id=info:doi/ L2 - https://aiche.confex.com/aiche/2012/webprogram/start.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Assessing Anhydrous Tertiary Alkanolamines for Gas Purifications T2 - 2012 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2012) AN - 1313007484; 6169275 JF - 2012 Annual Meeting of the American Institute for Chemical Engineering (AIChE 2012) AU - Heldebrant, David AU - Mathias, Paul AU - Afshar, Kash AU - Reddy, Satish AU - Smith, Arnold AU - McDougal, Rubin AU - Jasperson, Louis AU - Koech, Phillip AU - Bearden, Mark AU - Freeman, Charles Y1 - 2012/10/28/ PY - 2012 DA - 2012 Oct 28 KW - Purification UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313007484?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2012+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2012%29&rft.atitle=Assessing+Anhydrous+Tertiary+Alkanolamines+for+Gas+Purifications&rft.au=Heldebrant%2C+David%3BMathias%2C+Paul%3BAfshar%2C+Kash%3BReddy%2C+Satish%3BSmith%2C+Arnold%3BMcDougal%2C+Rubin%3BJasperson%2C+Louis%3BKoech%2C+Phillip%3BBearden%2C+Mark%3BFreeman%2C+Charles&rft.aulast=Heldebrant&rft.aufirst=David&rft.date=2012-10-28&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2012+Annual+Meeting+of+the+American+Institute+for+Chemical+Engineering+%28AIChE+2012%29&rft.issn=&rft_id=info:doi/ L2 - https://aiche.confex.com/aiche/2012/webprogram/start.html LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - CPAPER T1 - Localization of Southern Resident Killer Whales Using Two Star Arrays to Support Marine Renewable Energy T2 - OCEANS 2012 MTS/IEEE AN - 1313101729; 6173593 JF - OCEANS 2012 MTS/IEEE AU - Deng, Zhiqun AU - Ren, Huiying AU - Carlson, Thomas AU - Sun, Yannan AU - Fu, Tao AU - Martinez, Jayson AU - Matzner, Shari AU - Myers, Joshua Y1 - 2012/10/14/ PY - 2012 DA - 2012 Oct 14 KW - Whales KW - Renewable energy KW - Conservation KW - Marine mammals KW - Resource management KW - Environment management KW - Cetacea UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1313101729?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=OCEANS+2012+MTS%2FIEEE&rft.atitle=Localization+of+Southern+Resident+Killer+Whales+Using+Two+Star+Arrays+to+Support+Marine+Renewable+Energy&rft.au=Deng%2C+Zhiqun%3BRen%2C+Huiying%3BCarlson%2C+Thomas%3BSun%2C+Yannan%3BFu%2C+Tao%3BMartinez%2C+Jayson%3BMatzner%2C+Shari%3BMyers%2C+Joshua&rft.aulast=Deng&rft.aufirst=Zhiqun&rft.date=2012-10-14&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=OCEANS+2012+MTS%2FIEEE&rft.issn=&rft_id=info:doi/ L2 - http://www.oceans12mtsieeehamptonroads.org/docs/conference-program.pdf LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-02-26 N1 - Last updated - 2013-02-28 ER - TY - JOUR T1 - Modeling Dynamic Regulatory Processes in Stroke AN - 1872825532; 17317736 AB - The ability to examine the behavior of biological systems in silico has the potential to greatly accelerate the pace of discovery in diseases, such as stroke, where in vivo analysis is time intensive and costly. In this paper we describe an approach for in silico examination of responses of the blood transcriptome to neuroprotective agents and subsequent stroke through the development of dynamic models of the regulatory processes observed in the experimental gene expression data. First, we identified functional gene clusters from these data. Next, we derived ordinary differential equations (ODEs) from the data relating these functional clusters to each other in terms of their regulatory influence on one another. Dynamic models were developed by coupling these ODEs into a model that simulates the expression of regulated functional clusters. By changing the magnitude of gene expression in the initial input state it was possible to assess the behavior of the networks through time under varying conditions since the dynamic model only requires an initial starting state, and does not require measurement of regulatory influences at each time point in order to make accurate predictions. We discuss the implications of our models on neuroprotection in stroke, explore the limitations of the approach, and report that an optimized dynamic model can provide accurate predictions of overall system behavior under several different neuroprotective paradigms. Computational modeling aims to use mathematical and algorithmic principles to link components of biological systems to predict system behavior. In the past such models have described a small set of carefully studied molecular interactions (proteins in signal transduction pathways) or larger abstract components (cell types or functional processes in the immune system). In this study we use data from global transcriptional analysis of the processes of neuroprotection in a mouse model of stroke to generate functional modules, groups of genes that coherently act to accomplish functions. We then derive equations relating the expression of these modules to one another, treating these individual equations as a closed system, and demonstrate that the model can be used to simulate the gene expression of the system over time. Our work is novel in describing the use of global transcriptomic data to develop dynamic models of expression in an animal model. We believe that the models developed will aid in understanding the complex dynamics of neuroprotection and provide ways to predict outcomes in terms of neuroprotection or injury. This approach will be broadly applicable to other problems and provides an approach to building dynamic models from the bottom up. JF - PLoS Computational Biology AU - McDermott, Jason E AU - Jarman, Kenneth AU - Taylor, Ronald AU - Lancaster, Mary AU - Shankaran, Harish AU - Vartanian, Keri B AU - Stevens, Susan L AU - Stenzel-Poore, Mary P AU - Sanfilippo, Antonio AD - Pacific Northwest National Laboratory, Richland, Washington, United States of America Y1 - 2012/10/11/ PY - 2012 DA - 2012 Oct 11 PB - Public Library of Science, 185 Berry Street San Francisco CA 94107 United States VL - 8 IS - 0 SN - 1553-734X, 1553-734X KW - Biotechnology and Bioengineering Abstracts UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1872825532?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Abiotechresearch&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=PLoS+Computational+Biology&rft.atitle=Modeling+Dynamic+Regulatory+Processes+in+Stroke&rft.au=McDermott%2C+Jason+E%3BJarman%2C+Kenneth%3BTaylor%2C+Ronald%3BLancaster%2C+Mary%3BShankaran%2C+Harish%3BVartanian%2C+Keri+B%3BStevens%2C+Susan+L%3BStenzel-Poore%2C+Mary+P%3BSanfilippo%2C+Antonio&rft.aulast=McDermott&rft.aufirst=Jason&rft.date=2012-10-11&rft.volume=8&rft.issue=0&rft.spage=&rft.isbn=&rft.btitle=&rft.title=PLoS+Computational+Biology&rft.issn=1553734X&rft_id=info:doi/10.1371%2Fjournal.pcbi.1002722 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2017-03-01 N1 - Last updated - 2017-03-01 DO - http://dx.doi.org/10.1371/journal.pcbi.1002722 ER - TY - JOUR T1 - Diffusive release of uranium from contaminated sediments into capillary fringe pore water AN - 1769967146; 2016-019330 AB - Despite remediation efforts at the former nuclear weapons facility, leaching of uranium (U) from contaminated sediments to the ground water persists at the Hanford site 300 Area. Flooding of contaminated capillary fringe sediments due to seasonal changes in the Columbia River stage has been identified as a source for U supply to ground water. We investigated U release from Hanford capillary fringe sediments by packing sediments into reservoirs of centrifugal filter devices and saturating them with Columbia River water for 3 to 84 days at varying solution-to-solid ratios. After specified times, samples were centrifuged. Within the first three days, there was an initial rapid release of 6-9% of total U, independent of the solution-to-solid ratio. After 14 days of reaction, however, the experiments with the narrowest solution-to-solid ratios showed a decline in dissolved U concentrations. The removal of U from the solution phase was accompanied by removal of Ca and HCO (sub 3) (super -) . Geochemical modeling indicated that calcite could precipitate in the narrowest solution-to-solid ratio experiment. After the rapid initial release in the first three days for the wide solution-to-solid ratio experiments, there was sustained release of U into the pore water. This sustained release of U from the sediments had diffusion-limited kinetics. Abstract Copyright (2012) Elsevier, B.V. JF - Journal of Contaminant Hydrology AU - Rod, Kenton A AU - Wellman, Dawn M AU - Flury, Markus AU - Pierce, Eric M AU - Harsh, James B Y1 - 2012/10// PY - 2012 DA - October 2012 SP - 164 EP - 172 PB - Elsevier, Amsterdam VL - 140-141 SN - 0169-7722, 0169-7722 KW - United States KW - X-ray diffraction data KW - isotopes KW - mass spectra KW - reservoir rocks KW - remediation KW - ground water KW - radioactive isotopes KW - chemical reactions KW - sediments KW - floods KW - spectra KW - water pollution KW - kinetics KW - water supply KW - experimental studies KW - diffusion KW - Washington KW - pollutants KW - Columbia River KW - pollution KW - Hanford Site KW - capillary water KW - aquifers KW - ICP mass spectra KW - ion chromatograms KW - soil pollution KW - metals KW - chromatograms KW - mathematical methods KW - reservoir properties KW - nuclear facilities KW - uranium KW - leaching KW - water resources KW - actinides KW - unconfined aquifers KW - pore water KW - 02B:Hydrochemistry KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1769967146?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Contaminant+Hydrology&rft.atitle=Diffusive+release+of+uranium+from+contaminated+sediments+into+capillary+fringe+pore+water&rft.au=Rod%2C+Kenton+A%3BWellman%2C+Dawn+M%3BFlury%2C+Markus%3BPierce%2C+Eric+M%3BHarsh%2C+James+B&rft.aulast=Rod&rft.aufirst=Kenton&rft.date=2012-10-01&rft.volume=140-141&rft.issue=&rft.spage=164&rft.isbn=&rft.btitle=&rft.title=Journal+of+Contaminant+Hydrology&rft.issn=01697722&rft_id=info:doi/10.1016%2Fj.jconhyd.2012.09.002 L2 - http://www.sciencedirect.com/science/journal/01697722 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2016-01-01 N1 - Number of references - 45 N1 - Document feature - illus. incl. 6 tables N1 - Last updated - 2016-03-03 N1 - SubjectsTermNotLitGenreText - actinides; aquifers; capillary water; chemical reactions; chromatograms; Columbia River; diffusion; experimental studies; floods; ground water; Hanford Site; ICP mass spectra; ion chromatograms; isotopes; kinetics; leaching; mass spectra; mathematical methods; metals; nuclear facilities; pollutants; pollution; pore water; radioactive isotopes; remediation; reservoir properties; reservoir rocks; sediments; soil pollution; spectra; unconfined aquifers; United States; uranium; Washington; water pollution; water resources; water supply; X-ray diffraction data DO - http://dx.doi.org/10.1016/j.jconhyd.2012.09.002 ER - TY - JOUR T1 - The effect of rapid and sustained decompression on barotrauma in juvenile brook lamprey and Pacific lamprey: Implications for passage at hydroelectric facilities AN - 1439220773; 18593240 AB - Fish passing downstream through hydroelectric facilities may pass through turbines where they experience a rapid decrease in pressure, which can lead to barotraumas including swim bladder rupture, exopthalmia, emboli, and hemorrhaging. In juvenile Chinook salmon, the main mechanism for injury is thought to be expansion of existing gases (particularly those present in the swim bladder) and the rupture of the swim bladder ultimately leading to exopthalmia, emboli and hemorrhaging. In fish lacking a swim bladder, such as lamprey, barotraumas due to rapid decompression may be reduced, however this has yet to be extensively studied. Another mechanism for barotrauma can be gases coming out of solution and the rate of this occurrence may vary among species. In this study, juvenile brook and Pacific lamprey acclimated to 146.2 kPa (equivalent to a depth of 4.6 m) were subjected to rapid (<1 s) or sustained decompression (17 min) to a very low pressure (13.8 kPa) using a protocol previously applied to juvenile salmon. No mortality or evidence of barotraumas was observed following rapid decompression, nor up to 120 h after sustained decompression. In contrast, mortality or injury would be expected for 97.5% of juvenile Chinook salmon exposed to a similar rapid decompression to these very low pressures. Additionally, juvenile Chinook salmon experiencing sustained decompression died within 7 min. Thus, juvenile lamprey may not be susceptible to barotraumas associated with turbine passage to the same degree as juvenile salmonids. JF - Fisheries Research (Amsterdam) AU - Colotelo, AH AU - Pflugrath, B D AU - Brown, R S AU - Brauner, C J AU - Mueller, R P AU - Carlson, T J AU - Deng, Z D AU - Ahmann, M L AU - Trumbo, BA AD - Pacific Northwest National Laboratory, Richland, WA 99352, USA, Alison.Colotelo@pnl.gov Y1 - 2012/10// PY - 2012 DA - Oct 2012 SP - 17 EP - 20 VL - 129-130 SN - 0165-7836, 0165-7836 KW - Aqualine Abstracts; Water Resources Abstracts; ASFA Marine Biotechnology Abstracts; Environment Abstracts; Ecology Abstracts; Oceanic Abstracts; ASFA 1: Biological Sciences & Living Resources KW - Injuries KW - Anadromous species KW - Hydroelectric Plants KW - Expansion KW - Oncorhynchus tshawytscha KW - Petromyzontidae KW - I, Pacific KW - Downstream KW - Salmonidae KW - Pressure KW - Swim bladder KW - Salmon KW - Mortality KW - Juveniles KW - Decompression KW - Urinary bladder KW - Rupture KW - Turbines KW - Bioaccumulation KW - Gases KW - Lamprey KW - Fish KW - Mortality causes KW - AQ 00001:Water Resources and Supplies KW - ENA 06:Food & Drugs KW - D 04040:Ecosystem and Ecology Studies KW - Q1 08442:Population dynamics KW - Q4 27790:Fish KW - SW 6050:Rock mechanics and geology KW - O 1050:Vertebrates, Urochordates and Cephalochordates UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1439220773?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aaqualine&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=2009+Annual+Meeting+of+the+Geology+Society+of+America&rft.atitle=Predicting+Long-Term+Contaminant+Fluxes+in+the+Unsaturated+Zone+to+Evaluate+the+Effectiveness+of+Soil+Desiccation&rft.au=Freedman%2C+Vicky%3BWard%2C+Andy%3BTruex%2C+Mike&rft.aulast=Freedman&rft.aufirst=Vicky&rft.date=2009-10-18&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=2009+Annual+Meeting+of+the+Geology+Society+of+America&rft.issn=&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-10-01 N1 - Last updated - 2014-10-15 N1 - SubjectsTermNotLitGenreText - Juveniles; Turbines; Decompression; Injuries; Anadromous species; Swim bladder; Mortality causes; Mortality; Gases; Rupture; Pressure; Salmon; Urinary bladder; Downstream; Fish; Bioaccumulation; Lamprey; Hydroelectric Plants; Expansion; Petromyzontidae; Salmonidae; Oncorhynchus tshawytscha; I, Pacific ER - TY - JOUR T1 - Spatial and temporal variability of aerosol particles in Arctic spring AN - 1434028709; 18499887 AB - The objective of this work is to investigate the variability in the aerosol particle number concentration in Arctic spring. The Indirect and Semi-Direct Aerosol Campaign (ISDAC) was conducted during April 2008 in the vicinities of Fairbanks and Barrow, Alaska. Aircraft-based measurements of total aerosol particle number concentration (N sub(a)) in the size range of 0.12-3 mu m diameter were obtained using a passive cavity aerosol spectrometer probe (PCASP-100X). The analysis considers N sub(a) during cloud-free periods in biomass burning (BB) and non-BB aerosol loading scenarios, the latter including background cases and cases with elevated concentration in layers. The BB cases had air masses originating mainly from Russian and Asian forest and crop fires, whereas the non-BB cases originated predominantly from Arctic or oceanic regions. The average N sub(a) for all non-BB cases was 127 cm super(-3), while that for all BB cases was N sub(a) = 720 cm super(-3). These estimates do not, however, capture the details of aerosol particle layers encountered during most flights. Variability in N sub(a) was considered for constant altitude (horizontal) flight legs ranging from 50 to 650 km in length, as well as for vertical flight profiles up to 7 km above sea level. When aerosol particle layers were encountered, N sub(a) rapidly increased from 20 to 550 cm super(-3), and reached up to 2200 cm super(-3) within air masses dominated by BB plumes. The observed variability in N sub(a) may have important implications for estimating cloud microphysical properties as well as estimates of particle properties used in global climate model simulations, because averaging over large space- or time-scales may not represent real atmospheric conditions. The analysis demonstrates the difficulty in interpreting average aerosol particle characteristics along longer flight legs, particularly during cases with higher particle loading that varies over shorter distance scales and time periods. and Crown in the right of Canada. JF - Quarterly Journal of the Royal Meteorological Society AU - Shantz, N C AU - Gultepe, I AU - Liu, PSK AU - Earle, ME AU - Zelenyuk, A AD - Pacific Northwest National Laboratory, Richland, WA, USA., ismail.gultepe@ec.gc.ca Y1 - 2012/10// PY - 2012 DA - October 2012 SP - 2229 EP - 2240 PB - Wiley-Blackwell, 111 River Street Hoboken NJ 07030-5774 United States VL - 138 IS - 669 SN - 0035-9009, 0035-9009 KW - Meteorological & Geoastrophysical Abstracts; Aqualine Abstracts; Water Resources Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources KW - Arctic aerosol number concentration KW - aerosol variability KW - biomass burning KW - Variability KW - Aerosol particles KW - Climate change KW - Ocean-atmosphere system KW - Arctic KW - Spectrometers KW - Air masses KW - Marine KW - PNW, USA, Alaska, Barrow KW - Fires KW - Aerosols KW - Climate models KW - Temporal variations KW - Estimating KW - Climates KW - Global climate variability KW - Air Masses KW - USA, Alaska, Fairbanks KW - PN, Arctic KW - Clouds KW - Numerical simulations KW - Sea level variability KW - Royal Meteorological Society KW - Sea level changes KW - SW 5010:Network design KW - M2 551.581:Latitudinal Influences (551.581) KW - AQ 00008:Effects of Pollution KW - Q2 09167:Tides, surges and sea level UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1434028709?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aaqualine&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Quarterly+Journal+of+the+Royal+Meteorological+Society&rft.atitle=Spatial+and+temporal+variability+of+aerosol+particles+in+Arctic+spring&rft.au=Shantz%2C+N+C%3BGultepe%2C+I%3BLiu%2C+PSK%3BEarle%2C+ME%3BZelenyuk%2C+A&rft.aulast=Shantz&rft.aufirst=N&rft.date=2012-10-01&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=16th+Symposium+on+Separation+Sciences+and+Technology+for+Energy+Applications&rft.issn=&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-09-01 N1 - Last updated - 2016-07-07 N1 - SubjectsTermNotLitGenreText - Clouds; Aerosols; Temporal variations; Climate change; Ocean-atmosphere system; Sea level changes; Air masses; Fires; Climate models; Numerical simulations; Aerosol particles; Global climate variability; Sea level variability; Royal Meteorological Society; Variability; Estimating; Climates; Air Masses; Arctic; Spectrometers; PN, Arctic; PNW, USA, Alaska, Barrow; USA, Alaska, Fairbanks; Marine DO - http://dx.doi.org/10.1002/qj.1940 ER - TY - JOUR T1 - Evaluating the efficiency of a multi-core aware multi-objective optimization tool for calibrating the SWAT model AN - 1315642036; 17526432 AB - The efficiency of calibrating spatially distributed hydrologic models is a major concern in the application of these models to understand and manage natural and human activities that affect watershed systems. In this study, we developed a multi-core aware multi-objective evolutionary optimization tool, MAMEO, to calibrate the Soil and Water Assessment Tool (SWAT) model. The efficiency of MAMEO and that obtained with the sequential method were evaluated with data from the Little River Experimental Watershed. By using a 16-core machine, test results showed that calibrating SWAT with the MAMEO method required 80% less time than needed by the sequential method. MAMEO can provide multiple non-dominated parameter solutions in an efficient manner and enable modelers to simultaneously address multiple optimization objectives. JF - Transactions of the ASABE AU - Zhang, X AU - Izaurralde, R C AU - Zong, Z AU - Zhao, K AU - Thomson, A M AD - Joint Global Change Research Institute, Pacific Northwest National Laboratory, College Park, MD 20740, Xuesong.zhang@pnnl.gov Y1 - 2012/10// PY - 2012 DA - Oct 2012 SP - 1723 EP - 1731 PB - American Society of Agricultural Engineers, 2950 Niles Rd. St Joseph MI 49085 United States VL - 55 IS - 5 SN - 2151-0032, 2151-0032 KW - Aqualine Abstracts; Water Resources Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources; Environment Abstracts KW - Rivers KW - Testing Procedures KW - Ecological distribution KW - Man-induced effects KW - Freshwater KW - Watersheds KW - Experimental Basins KW - Soil KW - Hydrologic Models KW - Assessments KW - Human factors KW - River basin management KW - Optimization KW - Modelling KW - SW 5010:Network design KW - Q2 09171:Dynamics of lakes and rivers KW - AQ 00009:Appropriate Technology KW - ENA 15:Renewable Resources-Terrestrial UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1315642036?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aaqualine&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Transactions+of+the+ASABE&rft.atitle=Evaluating+the+efficiency+of+a+multi-core+aware+multi-objective+optimization+tool+for+calibrating+the+SWAT+model&rft.au=Zhang%2C+X%3BIzaurralde%2C+R+C%3BZong%2C+Z%3BZhao%2C+K%3BThomson%2C+A+M&rft.aulast=Zhang&rft.aufirst=X&rft.date=2012-10-01&rft.volume=55&rft.issue=5&rft.spage=1723&rft.isbn=&rft.btitle=&rft.title=Transactions+of+the+ASABE&rft.issn=21510032&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-10-01 N1 - Number of references - 27 N1 - Last updated - 2015-04-09 N1 - SubjectsTermNotLitGenreText - Ecological distribution; Man-induced effects; Watersheds; River basin management; Modelling; Soil; Human factors; Experimental Basins; Testing Procedures; Rivers; Hydrologic Models; Assessments; Optimization; Freshwater ER - TY - JOUR T1 - Oxygen electrocatalysts for water electrolyzers and reversible fuel cells: status and perspective AN - 1125237745; 17317896 AB - Hydrogen production by electrochemical water electrolysis has received great attention as an alternative technology for energy conversion and storage. The oxygen electrode has a substantial effect on the performance and durability of water electrolyzers and reversible (or regenerative) fuel cells because of its intrinsically slow kinetics for oxygen evolution/reduction and poor durability under harsh operating environments. To improve oxygen kinetics and durability of the electrode, extensive studies for highly active and stable oxygen electrocatalysts have been performed. However, due to the thermodynamic instability of transition metals in acidic media, noble metal compounds have been primarily utilized as electrocatalysts in water electrolyzers and reversible fuel cells. For water electrolyzer applications, single noble metal oxides such as ruthenium oxide and iridium oxide have been studied, and binary or ternary metal oxides have been developed to obtain synergistic effects of each component. On the other hand, a variety of bifunctional electrocatalysts with a combination of monofunctional electrocatalysts such as platinum for oxygen reduction and iridium oxide for oxygen evolution for reversible fuel cell applications have been mainly proposed. Practically, supported iridium oxide-on-platinum, its reverse type, and non-precious metal-supported platinum and iridium bifunctional electrocatalysts have been developed. Recent theoretical calculations and experimental studies in terms of water electrolysis and fuel cell technology suggest the effective ways to cope with current major challenges of cost and durability of oxygen electrocatalysts for technical applications. JF - Energy & Environmental Science AU - Park, Sehkyu AU - Shao, Yuyan AU - Liu, Jun AU - Wang, Yong AD - Pacific Northwest National Laboratory; Richland; WA 99352; USA, jun.liu@pnnl.gov Y1 - 2012/10// PY - 2012 DA - Oct 2012 SP - 9331 EP - 9344 PB - Royal Society of Chemistry, c/o Springer-Verlag New York Inc. Secaucus New Jersey 07096 2485 United States VL - 5 IS - 11 SN - 1754-5692, 1754-5692 KW - Sustainability Science Abstracts; Environment Abstracts KW - Oxygen KW - Fuel technology KW - Metals KW - Iridium KW - Kinetics KW - Electrodes KW - Platinum KW - Ruthenium KW - Technology KW - ENA 03:Energy KW - M3 1010:Issues in Sustainable Development UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1125237745?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Assamodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Energy+%26+Environmental+Science&rft.atitle=Oxygen+electrocatalysts+for+water+electrolyzers+and+reversible+fuel+cells%3A+status+and+perspective&rft.au=Park%2C+Sehkyu%3BShao%2C+Yuyan%3BLiu%2C+Jun%3BWang%2C+Yong&rft.aulast=Park&rft.aufirst=Sehkyu&rft.date=2012-10-01&rft.volume=5&rft.issue=11&rft.spage=9331&rft.isbn=&rft.btitle=&rft.title=Energy+%26+Environmental+Science&rft.issn=17545692&rft_id=info:doi/10.1039%2Fc2ee22554a LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2012-10-01 N1 - Number of references - 174 N1 - Last updated - 2015-03-19 N1 - SubjectsTermNotLitGenreText - Metals; Fuel technology; Oxygen; Iridium; Kinetics; Electrodes; Platinum; Ruthenium; Technology DO - http://dx.doi.org/10.1039/c2ee22554a ER - TY - JOUR T1 - Toward a Minimal Representation of Aerosols in Climate Models: Comparative Decomposition of Aerosol Direct, Semidirect, and Indirect Radiative Forcing AN - 1113220051; 17255768 AB - The authors have decomposed the anthropogenic aerosol radiative forcing into direct contributions from each aerosol species to the planetary energy balance through absorption and scattering of solar radiation, indirect effects of anthropogenic aerosol on solar and infrared radiation through droplet and crystal nucleation on aerosol, and semidirect effects through the influence of solar absorption on the distribution of clouds. A three-mode representation of the aerosol in version 5.1 of the Community Atmosphere Model (CAM5.1) yields global annual mean radiative forcing estimates for each of these forcing mechanisms that are within 0.1 W m super(-2) of estimates using a more complex seven-mode representation that distinguishes between fresh and aged black carbon and primary organic matter. Simulating fresh black carbon particles separately from internally mixed accumulation mode particles is found to be important only near fossil fuel sources. In addition to the usual large indirect effect on solar radiation, this study finds an unexpectedly large positive longwave indirect effect (because of enhanced cirrus produced by homogenous nucleation of ice crystals on anthropogenic sulfate), small shortwave and longwave semidirect effects, and a small direct effect (because of cancelation and interactions of direct effects of black carbon and sulfate). Differences between the three-mode and seven-mode versions are significantly larger (up to 0.2 W m super(-2)) when the hygroscopicity of primary organic matter is decreased from 0.1 to 0 and transfer of the primary carbonaceous aerosol to the accumulation mode in the seven-mode version requires more hygroscopic material coating the primary particles. Radiative forcing by cloudborne anthropogenic black carbon is only -0.07 W m super(-2). JF - Journal of Climate AU - Ghan, S J AU - Liu, X AU - Easter, R C AU - Zaveri, R AU - Rasch, P J AU - Yoon, J-H AU - Eaton, B AD - Pacific Northwest National Laboratory, Richland, Washington Y1 - 2012/10// PY - 2012 DA - Oct 2012 SP - 6461 EP - 6476 PB - American Meteorological Society, 45 Beacon St. Boston MA 02108-3693 United States VL - 25 IS - 19 SN - 0894-8755, 0894-8755 KW - Pollution Abstracts; Meteorological & Geoastrophysical Abstracts KW - Sulfates KW - Ice KW - Aerosols KW - Black carbon KW - Atmospheric pollution models KW - Organic matter KW - Anthropogenic factors KW - Black carbon aerosols KW - Particulates KW - Solar radiation KW - Nucleation KW - Clouds KW - Radiative forcing KW - Energy balance KW - Absorption KW - Solar energy KW - Carbon particles KW - P 0000:AIR POLLUTION KW - M2 551.581:Latitudinal Influences (551.581) UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1113220051?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Apollution&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Climate&rft.atitle=Toward+a+Minimal+Representation+of+Aerosols+in+Climate+Models%3A+Comparative+Decomposition+of+Aerosol+Direct%2C+Semidirect%2C+and+Indirect+Radiative+Forcing&rft.au=Ghan%2C+S+J%3BLiu%2C+X%3BEaster%2C+R+C%3BZaveri%2C+R%3BRasch%2C+P+J%3BYoon%2C+J-H%3BEaton%2C+B&rft.aulast=Ghan&rft.aufirst=S&rft.date=2012-10-01&rft.volume=25&rft.issue=19&rft.spage=6461&rft.isbn=&rft.btitle=&rft.title=Journal+of+Climate&rft.issn=08948755&rft_id=info:doi/10.1175%2FJCLI-D-11-00650.1 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2012-10-01 N1 - Number of references - 77 N1 - Last updated - 2013-07-15 N1 - SubjectsTermNotLitGenreText - Clouds; Nucleation; Atmospheric pollution models; Radiative forcing; Energy balance; Black carbon aerosols; Solar radiation; Carbon particles; Solar energy; Sulfates; Ice; Aerosols; Black carbon; Organic matter; Absorption; Anthropogenic factors; Particulates DO - http://dx.doi.org/10.1175/JCLI-D-11-00650.1 ER - TY - JOUR T1 - Impact of natural and anthropogenic aerosols on stratocumulus and precipitation in the Southeast Pacific: a regional modelling study using WRF-Chem AN - 1113222157; 17256534 AB - Cloud-system resolving simulations with the chemistry version of the Weather Research and Forecasting (WRF-Chem) model are used to quantify the relative impacts of regional anthropogenic and oceanic emissions on changes in aerosol properties, cloud macro- and microphysics, and cloud radiative forcing over the Southeast Pacific (SEP) during the VAMOS Ocean-Cloud-Atmosphere-Land Study Regional Experiment (VOCALS-REx) (15 October-16 November 2008). Two distinct regions are identified. The near-coast polluted region is characterized by low surface precipitation rates, the strong suppression of non-sea-salt particle activation due to sea-salt particles, a predominant albedo effect in aerosol indirect effects, and limited impact of aerosols associated with anthropogenic emissions on clouds. Opposite sensitivities to natural marine and anthropogenic aerosol perturbations are seen in cloud properties (e.g., cloud optical depth and cloud-top and cloud-base heights), precipitation, and the top-of-atmosphere and surface shortwave fluxes over this region. The relatively clean remote region is characterized by large contributions of aerosols from non-regional sources (lateral boundaries) and much stronger drizzle at the surface. Under a scenario of five-fold increase in regional anthropogenic emissions, this relatively clean region shows large cloud responses, for example, a 13% increase in cloud-top height and a 9% increase in albedo in response to a moderate increase (25% of the reference case) in cloud condensation nuclei (CCN) concentration. The reduction of precipitation due to this increase in anthropogenic aerosols more than doubles the aerosol lifetime in the clean marine boundary layer. Therefore, the aerosol impacts on precipitation are amplified by the positive feedback of precipitation on aerosol, which ultimately alters the cloud micro- and macro-physical properties, leading to strong aerosol-cloud-precipitation interactions. The high sensitivity is also related to an increase in cloud-top entrainment rate (by 16% at night) due to the increased anthropogenic aerosols. The simulated aerosol-cloud-precipitation interactions due to the increased anthropogenic aerosols have a stronger diurnal cycle over the clean region compared to the near-coast region with stronger interactions at night. During the day, solar heating results in more frequent decoupling of the cloud and sub-cloud layers, thinner clouds, reduced precipitation, and reduced sensitivity to the increase in anthropogenic emissions. This study shows the importance of natural aerosols in accurately quantifying anthropogenic forcing within a regional modeling framework. The results of this study also imply that the energy balance perturbations from increased anthropogenic emissions are larger in the more susceptible clean environment than in already polluted environment and are larger than possible from the first indirect effect alone. JF - Atmospheric Chemistry and Physics AU - Yang, Q AU - Gustafson, WI Jr AU - Fast, J D AU - Wang, H AU - Easter, R C AU - Wang, M AU - Ghan, S J AU - Berg, L K AU - Leung, L R AU - Morrison, H AD - Pacific Northwest National Laboratory, Richland, WA, USA Y1 - 2012/09/28/ PY - 2012 DA - 2012 Sep 28 SP - 8777 EP - 8796 PB - European Geophysical Society, Max-Planck-Str. 13 Katlenburg-Lindau Germany VL - 12 IS - 18 SN - 1680-7316, 1680-7316 KW - Aqualine Abstracts; Water Resources Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources; Meteorological & Geoastrophysical Abstracts KW - Environmental Effects KW - Prediction KW - Water Pollution KW - Marine Environment KW - Boundary Layers KW - Anthropogenic factors KW - ISE, Pacific KW - Positive feedback KW - Environmental factors KW - Radiative forcing KW - Aerosols KW - Aerosols-cloud condensation nuclei relationships KW - Albedo KW - Aerosols-cloud relationships KW - Precipitation KW - Cloud condensation nuclei KW - Ecosystem disturbance KW - Model Studies KW - Clouds KW - Energy balance KW - Regional-scale models KW - Atmospheric forcing KW - Q2 09205:Noise and bioacoustics KW - M2 551.510.42:Air Pollution (551.510.42) KW - SW 5040:Data acquisition KW - AQ 00002:Water Quality UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1113222157?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aaqualine&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Atmospheric+Chemistry+and+Physics&rft.atitle=Impact+of+natural+and+anthropogenic+aerosols+on+stratocumulus+and+precipitation+in+the+Southeast+Pacific%3A+a+regional+modelling+study+using+WRF-Chem&rft.au=Yang%2C+Q%3BGustafson%2C+WI+Jr%3BFast%2C+J+D%3BWang%2C+H%3BEaster%2C+R+C%3BWang%2C+M%3BGhan%2C+S+J%3BBerg%2C+L+K%3BLeung%2C+L+R%3BMorrison%2C+H&rft.aulast=Yang&rft.aufirst=Q&rft.date=2012-09-28&rft.volume=12&rft.issue=18&rft.spage=8777&rft.isbn=&rft.btitle=&rft.title=Atmospheric+Chemistry+and+Physics&rft.issn=16807316&rft_id=info:doi/10.5194%2Facp-12-8777-2012 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2012-10-01 N1 - Last updated - 2014-05-05 N1 - SubjectsTermNotLitGenreText - Prediction; Clouds; Aerosols; Energy balance; Albedo; Atmospheric forcing; Anthropogenic factors; Environmental factors; Ecosystem disturbance; Radiative forcing; Regional-scale models; Aerosols-cloud condensation nuclei relationships; Aerosols-cloud relationships; Positive feedback; Precipitation; Cloud condensation nuclei; Environmental Effects; Water Pollution; Marine Environment; Boundary Layers; Model Studies; ISE, Pacific DO - http://dx.doi.org/10.5194/acp-12-8777-2012 ER - TY - JOUR T1 - DanteR: an extensible R-based tool for quantitative analysis of -omics data AN - 1434027393; 18513633 AB - Motivation: The size and complex nature of mass spectrometry-based proteomics datasets motivate development of specialized software for statistical data analysis and exploration. We present DanteR, a graphical R package that features extensive statistical and diagnostic functions for quantitative proteomics data analysis, including normalization, imputation, hypothesis testing, interactive visualization and peptide-to-protein rollup. More importantly, users can easily extend the existing functionality by including their own algorithms under the Add-On tab.Availability: DanteR and its associated user guide are available for download free of charge at http://omics.pnl.gov/software/. We have an updated binary source for the DanteR package up on our website together with a vignettes document. For Windows, a single click automatically installs DanteR along with the R programming environment. For Linux and Mac OS X, users must install R and then follow instructions on the DanteR website for package installation. JF - Bioinformatics AU - Taverner, Tom AU - Karpievitch, Yuliya V AU - Polpitiya, Ashoka D AU - Brown, Joseph N AU - Dabney, Alan R AU - Anderson, Gordon A AU - Smith, Richard D AD - super(1)Biological Sciences Division, Pacific Northwest National Laboratory, 999 Battelle Boulevard, Richland, WA 99352, super(2)School of Mathematics and Physics, University of Tasmania, 1 Churchill Avenue, Hobart, Tasmania 7001, Australia, super(3)Center for Proteomics, Translational Genomics Research Institute, 445 N. Fifth Avenue, Phoenix, AZ 85004, super(4)Department of Statistics, Texas A & M University, College Station, TX 77843-3143, USA Y1 - 2012/09/15/ PY - 2012 DA - 2012 Sep 15 SP - 2404 EP - 2406 PB - Oxford University Press, Great Clarendon Street Oxford OX2 6DP United Kingdom VL - 28 IS - 18 SN - 1367-4803, 1367-4803 KW - Biotechnology and Bioengineering Abstracts KW - Computer programs KW - software KW - Data processing KW - Statistics KW - Algorithms KW - Computer graphics KW - proteomics KW - Bioinformatics KW - W 30960:Bioinformatics & Computer Applications UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1434027393?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Abiotechresearch&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Bioinformatics&rft.atitle=DanteR%3A+an+extensible+R-based+tool+for+quantitative+analysis+of+-omics+data&rft.au=Taverner%2C+Tom%3BKarpievitch%2C+Yuliya+V%3BPolpitiya%2C+Ashoka+D%3BBrown%2C+Joseph+N%3BDabney%2C+Alan+R%3BAnderson%2C+Gordon+A%3BSmith%2C+Richard+D&rft.aulast=Taverner&rft.aufirst=Tom&rft.date=2012-09-15&rft.volume=28&rft.issue=18&rft.spage=2404&rft.isbn=&rft.btitle=&rft.title=Bioinformatics&rft.issn=13674803&rft_id=info:doi/10.1093%2Fbioinformatics%2Fbts449 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-09-01 N1 - Last updated - 2015-03-20 N1 - SubjectsTermNotLitGenreText - Computer programs; software; Statistics; Data processing; Computer graphics; Algorithms; Bioinformatics; proteomics DO - http://dx.doi.org/10.1093/bioinformatics/bts449 ER - TY - JOUR T1 - A thermodynamic model for predicting mineral reactivity in supercritical carbon dioxide; I, phase behavior of carbon dioxide-water-chloride salt systems across the H (sub 2) O-rich to the CO (sub 2) -rich regions AN - 1080610768; 2012-086220 AB - Phase equilibria in mixtures containing carbon dioxide, water, and chloride salts have been investigated using a combination of solubility measurements and thermodynamic modeling. The solubility of water in the CO (sub 2) -rich phase of ternary mixtures of CO (sub 2) , H (sub 2) O and NaCl or CaCl (sub 2) was determined, using near infrared spectroscopy, at 90 atm and 40 to 100 degrees C. These measurements fill a gap in the experimental database for CO (sub 2) -water-salt systems, for which phase composition data have been available only for the H (sub 2) O-rich phases. A thermodynamic model for CO (sub 2) -water-salt systems has been constructed on the basis of the previously developed Mixed-Solvent Electrolyte (MSE) framework, which is capable of modeling aqueous solutions over broad ranges of temperature and pressure, is valid to high electrolyte concentrations, treats mixed-phase systems (with both scCO (sub 2) and water present) and can predict the thermodynamic properties of dry and partially water-saturated supercritical CO (sub 2) over broad ranges of temperature and pressure. Within the MSE framework the standard-state properties are calculated from the Helgeson-Kirkham-Flowers equation of state whereas the excess Gibbs energy includes a long-range electrostatic interaction term expressed by a Pitzer-Debye-Huckel equation, a virial coefficient-type term for interactions between ions and a short-range term for interactions involving neutral molecules. The parameters of the MSE model have been evaluated using literature data for both the H (sub 2) O-rich and CO (sub 2) -rich phases in the CO (sub 2) -H (sub 2) O binary and for the H (sub 2) O-rich phase in the CO (sub 2) -H (sub 2) O-NaCl/KCl/CaCl (sub 2) /MgCl (sub 2) ternary and multicompontent systems. The model accurately represents the properties of these systems at temperatures from 0 degrees C to 300 degrees C and pressures up to approximately 4000 atm. Further, the solubilities of H (sub 2) O in CO (sub 2) -rich phases that are predicted by the model are in agreement with the new measurements for the CO (sub 2) -H (sub 2) O-NaCl and CO (sub 2) -H (sub 2) O-CaCl (sub 2) systems even though the new data were not used in the parameterization of the model. Thus, the model can be used to predict the effect of various salts on the water content and water activity in CO (sub 2) -rich phases on the basis of parameters determined from the properties of aqueous systems. Given the importance of water activity in CO (sub 2) -rich phases for mineral reactivity, the model can be used as a foundation for predicting mineral transformations across the entire CO (sub 2) /H (sub 2) O composition range from aqueous solution to anhydrous scCO (sub 2) . An example application using the model is presented which involves the transformation of forsterite to nesquehonite as a function of temperature and water content in the CO (sub 2) -rich phase. JF - Chemical Geology AU - Springer, Ronald D AU - Wang, Zheming AU - Anderko, Andrzej AU - Wang, Peiming AU - Felmy, Andrew R Y1 - 2012/09/05/ PY - 2012 DA - 2012 Sep 05 SP - 151 EP - 171 PB - Elsevier, Amsterdam VL - 322-323 SN - 0009-2541, 0009-2541 KW - water KW - sodium chloride KW - experimental studies KW - prediction KW - equations KW - infrared spectra KW - carbon dioxide KW - models KW - reactivity KW - water-rock interaction KW - phase equilibria KW - mathematical methods KW - spectra KW - transformations KW - thermodynamic properties KW - P-T conditions KW - 02A:General geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1080610768?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Chemical+Geology&rft.atitle=A+thermodynamic+model+for+predicting+mineral+reactivity+in+supercritical+carbon+dioxide%3B+I%2C+phase+behavior+of+carbon+dioxide-water-chloride+salt+systems+across+the+H+%28sub+2%29+O-rich+to+the+CO+%28sub+2%29+-rich+regions&rft.au=Springer%2C+Ronald+D%3BWang%2C+Zheming%3BAnderko%2C+Andrzej%3BWang%2C+Peiming%3BFelmy%2C+Andrew+R&rft.aulast=Springer&rft.aufirst=Ronald&rft.date=2012-09-05&rft.volume=322-323&rft.issue=&rft.spage=151&rft.isbn=&rft.btitle=&rft.title=Chemical+Geology&rft.issn=00092541&rft_id=info:doi/10.1016%2Fj.chemgeo.2012.07.008 L2 - http://www.sciencedirect.com/science/journal/00092541 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2012, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2012-01-01 N1 - Number of references - 175 N1 - Document feature - illus. incl. 8 tables N1 - SuppNotes - Includes appendices N1 - Last updated - 2012-09-27 N1 - CODEN - CHGEAD N1 - SubjectsTermNotLitGenreText - carbon dioxide; equations; experimental studies; infrared spectra; mathematical methods; models; P-T conditions; phase equilibria; prediction; reactivity; sodium chloride; spectra; thermodynamic properties; transformations; water; water-rock interaction DO - http://dx.doi.org/10.1016/j.chemgeo.2012.07.008 ER - TY - JOUR T1 - CO (sub 2) storage simulation results integrating historical injection data and geotechnical information for the Cambrian Mt. Simon Sandstone in the Arches Province of the Midwest United States AN - 1696874530; 2015-066980 JF - Abstracts - AAPG, Eastern Section Meeting AU - Sminchak, Joel AU - White, Signe AU - Mishra, Srikanta AU - Oruganti, Yagna AU - Zeller, Evan AU - MacKenzie, Pete AU - Zody, Steve Y1 - 2012/09// PY - 2012 DA - September 2012 PB - American Association of Petroleum Geologists. Eastern Section, [varies] VL - 41 KW - United States KW - engineering properties KW - Mount Simon Sandstone KW - simulation KW - Cambrian KW - reservoir rocks KW - carbon dioxide KW - Upper Cambrian KW - fluid injection KW - Indiana KW - Eau Claire Formation KW - Ohio KW - carbon sequestration KW - pressure KW - numerical models KW - Illinois KW - three-dimensional models KW - Paleozoic KW - fluid flow KW - porosity KW - models KW - data integration KW - arches KW - Kentucky KW - Michigan KW - Arches Province KW - permeability KW - Midwest KW - 30:Engineering geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1696874530?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+-+AAPG%2C+Eastern+Section+Meeting&rft.atitle=CO+%28sub+2%29+storage+simulation+results+integrating+historical+injection+data+and+geotechnical+information+for+the+Cambrian+Mt.+Simon+Sandstone+in+the+Arches+Province+of+the+Midwest+United+States&rft.au=Sminchak%2C+Joel%3BWhite%2C+Signe%3BMishra%2C+Srikanta%3BOruganti%2C+Yagna%3BZeller%2C+Evan%3BMacKenzie%2C+Pete%3BZody%2C+Steve&rft.aulast=Sminchak&rft.aufirst=Joel&rft.date=2012-09-01&rft.volume=41&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Abstracts+-+AAPG%2C+Eastern+Section+Meeting&rft.issn=&rft_id=info:doi/ L2 - http://www.searchanddiscovery.com/abstracts/html/2012/90154eastern/abstracts/smin.htm LA - English DB - GeoRef N1 - Conference title - AAPG 41st annual Eastern Section meeting N1 - Copyright - GeoRef, Copyright 2016, American Geosciences Institute. N1 - Date revised - 2015-01-01 N1 - Last updated - 2016-09-16 N1 - CODEN - #06714 N1 - SubjectsTermNotLitGenreText - arches; Arches Province; Cambrian; carbon dioxide; carbon sequestration; data integration; Eau Claire Formation; engineering properties; fluid flow; fluid injection; Illinois; Indiana; Kentucky; Michigan; Midwest; models; Mount Simon Sandstone; numerical models; Ohio; Paleozoic; permeability; porosity; pressure; reservoir rocks; simulation; three-dimensional models; United States; Upper Cambrian ER - TY - JOUR T1 - Atomic level studies of the depletion in reactive sites during clay mineral dissolution AN - 1282822774; 2013-013406 AB - Clay mineral dissolution rates can continuously decrease over time as reactive sites located on edges are preferentially depleted under certain pH conditions. Changes in reactive surface area and the difficulties in quantifying this elusive variable have been cited as one key reason for the complexity in developing accurate rate equations for the dissolution of clay minerals. Recently, a solid-state nuclear magnetic resonance (NMR) method has been proposed for counting the number of reactive surface sites on a defined quantity of a clay mineral. Using this solid-state NMR proxy, changes in reactive surface area were monitored for a series of batch dissolution experiments of low-defect kaolinite KGa-1b and Ca-rich bentonite STx-1b, a montmorillonite-rich clay containing an opal-CT impurity, at 21 degrees C and initial pH 3. Kaolinite specific surface area as determined from BET gas isotherm data did not change within error during 80 days of dissolution whereas bentonite specific surface area decreased rapidly to about 50% of the original value as interlayer cation concentrations changed. The solid-state NMR proxy revealed decreases in the number of reactive surface sites per gram of kaolinite and bentonite as a function of dissolution time, presumed to be from the preferential dissolution of reactive sites on edges at initial pH 3. This depletion of reactive edge sites can be tied to a concomitant decrease in the rates of release of Si and Al into solution. The quantity of reactive sites can be used to estimate the dissolution rates of kaolinite and bentonite as well as estimate trends in dissolution rates of other clay minerals. These results further highlight the need to quantify the number of reactive sites present on a per gram basis as well as characterize their depletion with time to develop and use dissolution rate models for clay minerals and other heterogeneous materials in the environment. Abstract Copyright (2012) Elsevier, B.V. JF - Geochimica et Cosmochimica Acta AU - Sanders, Rebecca L AU - Washton, Nancy M AU - Mueller, Karl T Y1 - 2012/09/01/ PY - 2012 DA - 2012 Sep 01 SP - 100 EP - 116 PB - Elsevier, New York, NY VL - 92 SN - 0016-7037, 0016-7037 KW - silicates KW - experimental studies KW - bentonite KW - X-ray diffraction data KW - mass spectra KW - kaolinite KW - equations KW - solubility KW - NMR spectra KW - MAS NMR spectra KW - clay minerals KW - ICP mass spectra KW - reactivity KW - sedimentary rocks KW - mathematical methods KW - sheet silicates KW - spectra KW - crystal chemistry KW - chemical composition KW - clastic rocks KW - pH KW - 01B:Mineralogy of silicates KW - 02A:General geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1282822774?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Geochimica+et+Cosmochimica+Acta&rft.atitle=Atomic+level+studies+of+the+depletion+in+reactive+sites+during+clay+mineral+dissolution&rft.au=Sanders%2C+Rebecca+L%3BWashton%2C+Nancy+M%3BMueller%2C+Karl+T&rft.aulast=Sanders&rft.aufirst=Rebecca&rft.date=2012-09-01&rft.volume=92&rft.issue=&rft.spage=100&rft.isbn=&rft.btitle=&rft.title=Geochimica+et+Cosmochimica+Acta&rft.issn=00167037&rft_id=info:doi/10.1016%2Fj.gca.2012.05.038 L2 - http://www.sciencedirect.com/science/journal/00167037 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2013, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2013-01-01 N1 - Number of references - 60 N1 - PubXState - NY N1 - Document feature - illus. incl. 4 tables N1 - Last updated - 2013-02-05 N1 - CODEN - GCACAK N1 - SubjectsTermNotLitGenreText - bentonite; chemical composition; clastic rocks; clay minerals; crystal chemistry; equations; experimental studies; ICP mass spectra; kaolinite; MAS NMR spectra; mass spectra; mathematical methods; NMR spectra; pH; reactivity; sedimentary rocks; sheet silicates; silicates; solubility; spectra; X-ray diffraction data DO - http://dx.doi.org/10.1016/j.gca.2012.05.038 ER - TY - JOUR T1 - Tc(VII) reduction kinetics by titanomagnetite (Fe (sub 3-x) Ti (sub x) O (sub 4) ) nanoparticles AN - 1282822760; 2013-013404 AB - Technetium contamination remains a major environmental problem at nuclear reprocessing sites, such as at the Hanford nuclear reservation, Washington, USA. Here we investigate the heterogeneous reduction of the highly soluble pertechnetate anion [Tc(VII)O (sub 4) (super -) ] to sparingly soluble Tc(IV)-bearing solids by a novel and well-characterized set of mixed-valent titanium-doped magnetite nanoparticles, structurally and chemically analogous to titanomagnetites naturally present in Hanford sediments. Titanomagnetite (Fe (sub 3-x) Ti (sub x) O (sub 4) ) nanoparticles (10-12 nm) with varying Ti content (0=