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Fundamental and Computational Sciences Directorate

Staff information

Thomas Wietsma

Environmental Dynamics & Simulations
Scientist
Pacific Northwest National Laboratory
PO Box 999
MSIN: K8-96
Richland, WA 99352

PNNL Publications

2017

  • Childers MI, MC Endres, CA Burns, BJ Garcia, J Liu, TW Wietsma, AH Bonneville, J Moore, II Leavy, L Zhong, HT Schaef, L Fu, H Wang, and CA Fernandez. 2017. "Novel Highly Dispersible, Thermally Stable Core/Shell Proppants for Geothermal Applications." Geothermics 70:98-109.  doi:10.1016/j.geothermics.2017.05.013
  • Childers MI, MT Nguyen, KA Rod, PK Koech, W Um, J Chun, VA Glezakou, DT Linn, TJ Roosendaal, TW Wietsma, NJ Huerta, B Kutchko, and CA Fernandez. 2017. "Polymer-Cement Composites with Self-Healing Ability for Geothermal and Fossil Energy Applications." Chemistry of Materials 29(11):4708-4718.  doi:10.1021/acs.chemmater.7b00344
  • Maddi B, EA Panisko, TW Wietsma, TL Lemmon, MS Swita, KO Albrecht, and DT Howe. 2017. "Quantitative Characterization of Aqueous Byproducts from Hydrothermal Liquefaction of Municipal Wastes, Food Industry Wastes, and Biomass Grown on Waste." ACS Sustainable Chemistry & Engineering 5(3):2205-2214.  doi:10.1021/acssuschemeng.6b02367

2016

  • Chang C, Q Zhou, TJ Kneafsey, M Oostrom, TW Wietsma, and Q Yu. 2016. "Pore-Scale Supercritical CO2 Dissolution and Mass Transfer under Imbibition Conditions." Advances in Water Resources 92:142-158.  doi:10.1016/j.advwatres.2016.03.015
  • Maddi B, EA Panisko, TW Wietsma, TL Lemmon, MS Swita, KO Albrecht, and DT Howe. 2016. "Quantitative Characterization of the Aqueous Fraction from Hydrothermal Liquefaction of Algae." Biomass & Bioenergy 93:122-130.  doi:10.1016/j.biombioe.2016.07.010
  • Moore JS, SS Xantheas, JW Grate, TW Wietsma, E Gratton, and A Vasdekis. 2016. "Modular Polymer Biosensors by Solvent Immersion Imprint Lithography." Journal of Polymer Science. Part B, Polymer Physics 54(1):98-103.  doi:10.1002/polb.23961
  • Oostrom M, Y Mehmani, PDJ Romero Gomez, Y Tang, H Liu, H Yoon, Q Kang, V Joekar Niasar, M Balhoff, T Dewers, GD Tartakovsky, EAE Leist, NJ Hess, WA Perkins, CL Rakowski, MC Richmond, JA Serkowski, CJ Werth, AJ Valocchi, TW Wietsma, and C Zhang. 2016. "Pore-scale and Continuum Simulations of Solute Transport Micromodel Benchmark Experiments." Computational Geosciences 20(4):857-879.  doi:10.1007/s10596-014-9424-0

2015

  • Panisko EA, TW Wietsma, TL Lemmon, KO Albrecht, and DT Howe. 2015. "Characterization of the Aqueous Fractions from Hydrotreatment and Hydrothermal Liquefaction of Lignocellulosic Feedstocks." Biomass & Bioenergy 74:162-171.  doi:10.1016/j.biombioe.2015.01.011
  • Scheibe TD, WA Perkins, MC Richmond, MI McKinley, PDJ Romero Gomez, M Oostrom, TW Wietsma, JA Serkowski, and JM Zachara. 2015. "Pore-Scale and Multiscale Numerical Simulation of Flow and Transport in a Laboratory-Scale Column." Water Resources Research 51(2):1023-1035.  doi:10.1002/2014WR015959
  • Truex MJ, VR Vermeul, D Adamson, M Oostrom, L Zhong, RD Mackley, BG Fritz, JA Horner, TC Johnson, JN Thomle, DR Newcomer, CD Johnson, M Rysz, TW Wietsma, and CJ Newell. 2015. "Field Test of Enhanced Remedial Amendment Delivery Using a Shear-Thinning Fluid." Ground Water Monitoring and Remediation 35(3):34-45. 

2014

  • Oostrom M, and TW Wietsma. 2014. Intermediate-Scale Laboratory Experiments of Subsurface Flow and Transport Resulting from Tank LeaksPNNL-23586, Pacific Northwest National Laboratory, Richland, WA. 
  • Oostrom M, MJ Truex, TW Wietsma, and GD Tartakovsky. 2014. "Pore-Water Extraction from Unsaturated Porous Media: Intermediate-Scale Laboratory." Vadose Zone Journal 13(8):, doi:10.2136/vzj2014.04.0044
  • Oostrom M, MJ Truex, VR Vermeul, L Zhong, GD Tartakovsky, and TW Wietsma. 2014. "Remedial Amendment Delivery near the Water Table Using Shear Thinning Fluids: Experiments and Numerical Simulations." Environmental Processes 1(4):331-351.  doi:10.1007/s40710-014-0031-9
  • Wunschel DS, HE Engelmann, KD Victry, BH Clowers, CM Sorensen, NB Valentine, CM Mahoney Fahey, TW Wietsma, and KL Wahl. 2014. "Protein markers for identification of Yersinia pestis and their variation related to culture." Molecular and Cellular Probes 28(2-3):65-72.  doi:10.1016/j.mcp.2013.12.001

2013

  • Fanizza MF, H Yoon, C Zhang, M Oostrom, TW Wietsma, NJ Hess, ME Bowden, TJ Strathmann, KT Finneran, and CJ Werth. 2013. "Pore-Scale Evaluation of Uranyl Phosphate Precipitation in a Model Groundwater System." Water Resources Research 49(2):874-890.  doi:10.1002/wrcr.20088
  • Grate JW, MG Warner, JW Pittman, KJ Dehoff, TW Wietsma, C Zhang, and M Oostrom. 2013. "Silane Modification of Glass and Silica Surfaces to Obtain Equally Oil-Wet Surfaces in Glass-Covered Silicon Micromodel Applications." Water Resources Research 49(8):4724-4729.  doi:10.1002/wrcr.20367
  • Johnson TC, M Oostrom, MJ Truex, JN Thomle, and TW Wietsma. 2013. "Determination of water saturation using gas phase partitioning tracers and time-lapse electrical conductivity measurements." Vadose Zone Journal 12(2):, doi:10.2136/vzj2012.0142
  • Truex MJ, M Oostrom, TW Wietsma, GV Last, and DC Lanigan. 2013. Pore-Water Extraction Scale-Up Study for the SX Tank FarmPNNL-21882; RPT-DVZ-AFRI-011, Pacific Northwest National Laboratory, Richland, WA. 
  • Wang Y, C Zhang, N Wei, M Oostrom, TW Wietsma, X Li, and A Bonneville. 2013. "Experimental study of crossover from capillary to viscous fingering for supercritical CO2 - water displacement in a homogeneous pore network." Environmental Science & Technology 47(1):212-218.  doi:10.1021/es3014503

2012

  • Amonette JE, PM Jeffers, O Qafoku, CK Russell, DR Humphrys, TW Wietsma, and MJ Truex. 2012. Abiotic degradation rates for carbon tetrachloride and chloroform: Final report. PNNL-22062; RPT-DVZ-AFRI-012, Pacific Northwest National Laboratory, Richland, WA. 
  • Grate JW, KJ Dehoff, MG Warner, JW Pittman, TW Wietsma, C Zhang, and M Oostrom. 2012. "Correlation of Oil-Water and Air-Water Contact Angles of Diverse Silanized Surfaces and Relationship to Fluid Interfacial Tensions." Langmuir 28(18):7182-7188.  doi:10.1021/la204322k
  • Oostrom M, TW Wietsma, CE Strickland, VL Freedman, and MJ Truex. 2012. "Sensor and numerical simulator evaluation for porous medium desiccation and rewetting at the intermediate laboratory scale." Vadose Zone Journal 11(1):Article No. 0089.  doi:10.2136/vzj2011.0089
  • Oostrom M, KV Smoot, TW Wietsma, MJ Truex, MW Benecke, and GB Chronister. 2012. "Vadose Zone Soil Moisture Wicking Using Super Absorbent Polymers." Vadose Zone Journal 11(4):, doi:10.2136/vzj2011.0200
  • Oostrom M, VL Freedman, TW Wietsma, JH Dane, and MJ Truex. 2012. "Effects of Porous Medium Heterogeneity on Vadose Zone Desiccation: Intermediate-scale Laboratory Experiments and Simulations." Vadose Zone Journal 11(4):, doi:10.2136/vzj2011.0168

2011

  • Zhang C, M Oostrom, JW Grate, TW Wietsma, and MG Warner. 2011. "Liquid CO2 Displacement of Water in a Dual-Permeability Pore Network Micromodel." Environmental Science & Technology 45(17):7581-7588.  doi:10.1021/es201858r
  • Zhang C, M Oostrom, TW Wietsma, JW Grate, and MG Warner. 2011. "Influence of Viscous and Capillary Forces on Immiscible Fluid Displacement: Pore-Scale Experimental Study in a Water-Wet Micromodel Demonstrating Viscous and Capillary Fingering." Energy and Fuels 25(8):3493-3505.  doi:10.1021/ef101732k
  • Oostrom M, GD Tartakovsky, TW Wietsma, MJ Truex, and JH Dane. 2011. "Determination of Water Saturation in Relatively Dry Porous Media Using Gas-phase Tracer Tests." Vadose Zone Journal 10(2):634-641. 
  • Oostrom M, VL Freedman, TW Wietsma, and MJ Truex. 2011. Pore-Water Extraction Intermediate-Scale Laboratory Experiments and Numerical SimulationsPNNL-20507, Pacific Northwest National Laboratory, Richland, WA. 
  • Truex MJ, M Oostrom, VL Freedman, CE Strickland, TW Wietsma, GD Tartakovsky, and AL Ward. 2011. Laboratory and Modeling Evaluations in Support of Field Testing for Desiccation at the Hanford SitePNNL-20146, Pacific Northwest National Laboratory, Richland, WA. 
  • Truex MJ, T Macbeth, VR Vermeul, BG Fritz, DP Mendoza, RD Mackley, TW Wietsma, G Sandberg, T Powell, J Powers, E Pitre, MM Michalsen, S Ballock-Dixon, L Zhong, and M Oostrom. 2011. "Demonstration of Combined Zero-Valent Iron and Electrical Resistance Heating for In Situ Trichloroethene Remediation." Environmental Science & Technology 45(12):5346-5351.  doi:10.1021/es104266a
  • Truex MJ, VR Vermeul, DP Mendoza, BG Fritz, RD Mackley, M Oostrom, TW Wietsma, and T Macbeth. 2011. "Injection of Zero Valent Iron into an Unconfined Aquifer Using Shear-Thinning Fluids." Ground Water Monitoring and Remediation 31(1):50-58. 

2010

  • Zhang C, KJ Dehoff, NJ Hess, M Oostrom, TW Wietsma, AJ Valocchi, BW Fouke, and CJ Werth. 2010. "Pore-Scale Study of Transverse Mixing Induced CaCO3 Precipitation and Permeability Reduction in a Model Subsurface Sedimentary System." Environmental Science & Technology 44(20):7833-7838.  doi:10.1021/es1019788
  • Amonette JE, PM Jeffers, O Qafoku, CK Russell, DR Humphrys, TW Wietsma, and MJ Truex. 2010. Abiotic Degradation Rates for Carbon Tetrachloride and Chloroform: Progress in FY 2010PNNL-20044, Pacific Northwest National Laboratory, Richland, WA. 
  • Amonette JE, PM Jeffers, O Qafoku, CK Russell, TW Wietsma, and MJ Truex. 2010. Abiotic Degradation Rates for Carbon Tetrachloride and Chloroform: Progress in FY2009 PNNL-19142, Pacific Northwest National Laboratory, Richland, WA. 
  • Grate JW, C Zhang, TW Wietsma, MG Warner, NC Anheier, Jr, BE Bernacki, G Orr, and M Oostrom. 2010. "A note on the visualization of wetting film structures and a nonwetting immiscible fluid in a pore network micromodel using a solvatochromic dye ." Water Resources Research 46:W11602.  doi:10.1029/2010WR009419
  • Oostrom M, MJ Truex, GD Tartakovsky, and TW Wietsma. 2010. "Three-Dimensional Simulation of Volatile Organic Compound Mass Flux from the Vadose Zone to Groundwater." Ground Water Monitoring and Remediation 30(3):45-56.  doi:10.1111/j.1745-6592.2010.01285.x
  • Oostrom M, MJ Truex, GD Tartakovsky, and TW Wietsma. 2010. "Three-Dimensional Simulation of Volatile Organic Compound Mass Flux from the Vadose Zone to Groundwater ." Ground Water Monitoring and Remediation 30(3):45-56. 
  • Truex MJ, M Oostrom, ZF Zhang, KC Carroll, JA Schramke, TW Wietsma, GD Tartakovsky, KA Gordon, and GV Last. 2010. Evaluation of Soil Flushing for Application to the Deep Vadose Zone in the Hanford Central PlateauPNNL-19938, Pacific Northwest National Laboratory, Richland, WA. 
  • Willingham TW, C Zhang, CJ Werth, AJ Valocchi, M Oostrom, and TW Wietsma. 2010. "Using Dispersivity Values to Quantify the Effects of Pore-Scale Flow Focusing on Enhanced Reaction along a Transverse Mixing Zone." Advances in Water Resources 33(4):525-535.  doi:10.1016/j.advwatres.2010.02.004

2009

  • Wietsma TW, M Oostrom, MA Covert, TE Queen, and MJ Fayer. 2009. "An automated tool for three types of saturated hydraulic conductivity laboratory measurements." Soil Science Society of America Journal 73(2):466-470. 
  • Amonette JE, O Qafoku, TW Wietsma, PM Jeffers, CK Russell, and MJ Truex. 2009. Carbon Tetrachloride and Chloroform Attenuation Parameter Studies: Heterogeneous Hydrolytic Reactions -- Status ReportPNNL-18735, Pacific Northwest National Laboratory, Richland, WA. 
  • Oostrom M, TW Wietsma, JH Dane, MJ Truex, and AL Ward. 2009. "Desiccation of unsaturated porous media: Intermediate-scale experiments and numerical simulation." Vadose Zone Journal 8(3):643-650. 
  • Szecsody JE, ML Rockhold, M Oostrom, RC Moore, CA Burns, MD Williams, L Zhong, JS Fruchter, JP McKinley, VR Vermeul, MA Covert, TW Wietsma, AT Breshears, and BJ Garcia. 2009. Sequestration of Sr-90 Subsurface Contamination in the Hanford 100-N Area by Surface Infiltration of a Ca-Citrate-Phosphate SolutionPNNL-18303, Pacific Northwest National Laboratory, Richland, WA. 
  • Yoon H, M Oostrom, TW Wietsma, CJ Werth, and AJ Valocchi. 2009. "Numerical and experimental investigation of DNAPL removal mechanisms in a layered porous medium by means of soil vapor extraction." Journal of Contaminant Hydrology 109(1-4):1-13.  doi:10.1016/j.jconhyd.2009.07.001

2008

  • Amonette JE, PM Jeffers, O Qafoku, CK Russell, TW Wietsma, and MJ Truex. 2008. Abiotic Degradation Rates for Carbon Tetrachloride: and Chloroform: Progress in FY 2008PNNL-18020, Pacific Northwest National Laboratory, Richland, WA. 
  • Zhong L, M Oostrom, TW Wietsma, and MA Covert. 2008. "Enhanced Remedial Amendment Delivery through Fluid Viscosity Modifications: Experiments and numerical simulations." Journal of Contaminant Hydrology 101(1-4):29-41.  doi:10.1016/j.jconhyd.2008.07.007

2007

  • Istok JD, MM Park, AD Peacock, M Oostrom, and TW Wietsma. 2007. "An experimental investigation of nitrogen gas produced during denitrification." Ground Water 45(4):461-467. 
  • Oostrom M, TW Wietsma, MA Covert, and VR Vermeul. 2007. "Zero-valent Iron Emplacement in Permeable Porous Media Using Polymer Additions." Ground Water Monitoring and Remediation 27(1):122-130. 
  • Oostrom M, JH Dane, and TW Wietsma. 2007. "A Review of Multidimensional, Multifluid Intermediate-scale Experiments: Flow Behavior, Saturation Imaging, and Tracer Detection and Quantification ." Vadose Zone Journal 6(3):610-637.  doi:10.2136/vzj2006.0178
  • Oostrom M, MJ Truex, PD Thorne, and TW Wietsma. 2007. "Three-Dimensional Multifluid Flow and Transport at the Brooklawn Site near Baton Rouge, LA: A Case Study." Soil & Sediment Contamination 16(2):109-141. 

2006

  • Oostrom M, TW Wietsma, MA Covert, and VR Vermeul. 2006. "Micron-Size Zero-Valent Iron Emplacement in Porous Media Using Polymer Additives: Column and Flow Cell Ex-periments." In 26th Annual American Geophysical Union Hydrology Days Conference Proceedings, March 20-22, 2006, Colorado State University, ed. J.A. Ramirez, pp. 131-139.  Colorado State University, Fort Collins, CO. 
  • Oostrom M, C Hofstee , and TW Wietsma. 2006. "LNAPLs do not Always Float: An Example Case of a Viscous LNAPL under Variable Water Table Conditions ." In 26th Annual American Geophysical Union Hydrology Days, March 20-22, 2006, ed. J.A. Ramirez, pp. 119-130.  Colorado State University, Fort Collins, CO. 
  • Oostrom M, C Hofstee, and TW Wietsma. 2006. "Behavior of a Viscous LNAPL under Variable Water Table Conditions." Soil & Sediment Contamination 15(6):543 - 564 .  doi:10.1080/15320380600958976
  • Oostrom M, JH Dane, and TW Wietsma. 2006. "A Review of Multidimensional, Multifluid Intermediate-scale Experiments: Nonaqueous Phase Liquid Dissolution and Enhanced Remediation." Vadose Zone Journal 5:570-598.  doi:10.2136/vzj2005.0125

2005

  • Laskin A, TW Wietsma, BJ Krueger, and VH Grassian. 2005. "Heterogeneous Chemistry of Individual Mineral Dust Particles with Nitric Acid. A Combined CCSEM/EDX, ESEM AND ICP-MS Study." Journal of Geophysical Research. D. (Atmospheres) 110(D10):D10208. 
  • Oostrom M, TW Wietsma, MA Covert, and VR Vermeul. 2005. An Experimental Study of Micron-Size Zero-Valent Iron Emplacement in Permeable Porous Media Using Polymer-Enhanced FluidsPNNL-15573, Pacific Northwest National Laboratory, Richland, WA. 
  • Oostrom M, JH Dane, and TW Wietsma. 2005. "Removal of Carbon Tetrachloride from a Layered Porous Medium by Means of Soil Vapor Extraction Enhanced by Desiccation and Water Table Reduction." Vadose Zone Journal 4(4):1170-1182.  doi:10.2136/vzj2004.0173
  • Oostrom M, JH Dane, and TW Wietsma. 2005. "Removal of carbon tetrachloride from a layered porous medium by means of soil vapor extraction enhanced by desiccation and water table reduction." Vadose Zone Journal 4:1170-1182.  doi:10.2136/vzj2004.0173
  • Oostrom M, MD White, RJ Lenhard, P Van Geel, and TW Wietsma. 2005. "A comparison of models describing residual NAPL formation in the vadose zone." Vadose Zone Journal 4(1):163-174. 

2004

2003

  • Oostrom M, C Hofstee, RJ Lenhard, and TW Wietsma. 2003. "Flow Behavior and Residual Saturation Formation of Liquid Carbon Tetrachloride in Unsaturated Heterogeneous Porous Media." Journal of Contaminant Hydrology 64(1-2):93-112. 
  • Oostrom M, PD Thorne, MD White, MJ Truex, and TW Wietsma. 2003. "Numerical Modeling to Assess DNAPL Movement and Removal at the Scenic Site Operable Unit Near Baton Rouge, Louisiana: A Case Study." Soil & Sediment Contamination 12(6):901 - 926. 

2001

  • Schroth MH, M Oostrom, TW Wietsma, and JD Istok. 2001. "In-situ oxidation of trichloroethene by permanganate: effects on porous medium hydraulic properties." Journal of Contaminant Hydrology 50(1-2):79-98. 
  • Zachara JM, NS Foster, JE Amonette, EJ Bylaska, AR Felmy, PL Gassman, SM Heald, RK Kukkadapu, C Liu, MJ Mason, KM Rosso, CK Russell, JR Rustad, SC Smith, Z Wang, and TW Wietsma. 2001. Annual Report 2000 Environmental Dynamics and SimulationPNNL-13456, Pacific Northwest National Laboratory, Richland, WA. 

2000

  • Brusseau M, NT Nelson, M Oostrom, Z Zhang, GR Johnson, and TW Wietsma. 2000. "Influence of Heterogeneity and Sampling Method on Aqueous Concentrations Associated with NAPL Dissolution." Environmental Science and Technology 34(17):3657-3664. 
  • Oostrom M, JH Dane, and TW Wietsma. 2000. "Gamma radiation techniques in subsurface multifluid flow and transport studies." In Proceedings of the 2000 ASME Fluids Engineering Division Summer Meeting : presented at the 2000 ASME Fluids Engineering Division Summer Meeting, June 11-15, 2000, Boston, Massachusetts, vol. 2, ed. David E. Stock, pp. 417-424.  American Society of Mechanical Engineers, New York, NY. 
  • Schroth MH, M Oostrom, TW Wietsma, and JD Istok. 2000. "In Situ Oxidation of Liquid Trichloroethylene by Permanganate Solutions: Preliminary Results of Column Studies." In Proceedings of the 19th American Geophysical Union Hydrology Days, ed. H.J. Morel-Seytoux, pp. 411-420.  Hydrology Days Pub., Atherton, CA. 
  • Zachara JM, NS Foster, JE Amonette, EJ Bylaska, AR Felmy, PL Gassman, SM Heald, RK Kukkadapu, C Liu, MJ Mason, KM Rosso, CK Russell, JR Rustad, SC Smith, Z Wang, and TW Wietsma. 2000. Annual Report 1999 Environmental Dynamics & Simulation PNNL-13206, Pacific Northwest National Laboratory, Richland, WA. 

1999

  • Nelson NT, M Oostrom, TW Wietsma, and ML Brusseau. 1999. "An Experimental Investigation of the Partitioning Tracer Method to Detect and Quantify Dense Nonaqueous Phase Liquids in a Heterogeneous System ." In American Geophysical Union Hydrology Days. Held August, 1999 in Fort Collins, CO., ed. H.J. Morel-Seytoux, Ed., pp. 307-318  Hydrology Days, Atherton, CA. 
  • Nelson NT, M Oostrom, TW Wietsma, and ML Brusseau. 1999. "Partitioning tracer method for the in situ measurement of DNAPL saturation: influence of heterogeneity and sampling method." Environmental Science and Technology 33(22):4046-4053. 
  • Williams MD, VR Vermeul, M Oostrom, JC Evans, JR, JS Fruchter, JD Istok, MD Humphrey, DC Lanigan, JE Szecsody, MD White, TW Wietsma, and CR Cole. 1999. Anoxic Plume Attenuation in a Fluctuating Water Table System: Impact of 100-D Area In Situ Redox Manipulation on Downgradient Dissolved Oxygen ConcentrationsPNNL-12192, Pacific Northwest National Laboratory, Richland, WA. 

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