T
Thomas W. Wietsma
Researcher at Pacific Northwest National Laboratory
Publications - 72
Citations - 3432
Thomas W. Wietsma is an academic researcher from Pacific Northwest National Laboratory. The author has contributed to research in topics: Vadose zone & Micromodel. The author has an hindex of 30, co-authored 71 publications receiving 3025 citations. Previous affiliations of Thomas W. Wietsma include Environmental Molecular Sciences Laboratory & University of Illinois at Urbana–Champaign.
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Zero-valent iron for the in situ remediation of selected metals in groundwater
TL;DR: In this paper, a series of kinetic-batch studies was conducted to determine the capability of zero-valent iron (Fe0) to remove a wide range of highly mobile contaminants in groundwater.
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Influence of Viscous and Capillary Forces on Immiscible Fluid Displacement: Pore-Scale Experimental Study in a Water-Wet Micromodel Demonstrating Viscous and Capillary Fingering
TL;DR: In this article, a series of displacement experiments was conducted to investigate the impacts of viscous and capillary forces on displacement stability and fluid saturation distributions in a homogeneous water-wet pore network micromodel with precisely microfabricated pore structures.
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Interaction of hydrophobic organic compounds with mineral-bound humic substances
TL;DR: The experimental observations indicate that hydrophobic adsorption rather than phase partitioning was the dominant mode of HOC binding, suggesting that the configuration of the humic acid in solution influenced its structure on the mineral surface.
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Heterogeneous chemistry of individual mineral dust particles with nitric acid: A combined CCSEM/EDX, ESEM, and ICP‐MS study
TL;DR: In this paper, the chemistry of individual dust particles from four authentic dust samples with gas-phase nitric acid was investigated using conventional scanning electron microscopy with energy dispersive analysis of X-rays and computer controlled SEM/EDX.
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The influence of physical heterogeneity on microbial degradation and distribution in porous media
Ellyn M. Murphy,Timothy R. Ginn,Ashokkumar Chilakapati,C. Thomas Resch,Jerry L. Phillips,Thomas W. Wietsma,Christina M. Spadoni +6 more
TL;DR: This iterative experimental/modeling approach identified processes that contributed (surprisingly) to biodegradation in heterogeneous media and yet are not currently incorporated in most mathematical models: buoyancy effects associated with very small solution density variations, amplified in heterogeneity media, and dynamic biological processes associated with growth.