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Fundamental and Computational Sciences Directorate

Staff information

Tom Resch

Geochemistry Team A
Pacific Northwest National Laboratory
PO Box 999
MSIN: P7-50
Richland, WA 99352

PNNL Publications


  • Saslow S.A., E. Cordova, N.M. Escobedo Avalos, O. Qafoku, M.E. Bowden, C.T. Resch, and N. Lahiri, et al. 2023. "Accumulation mechanisms for contaminants on weak-base hybrid ion exchange resins." Journal of Hazardous Materials 459. PNNL-SA-167020. doi:10.1016/j.jhazmat.2023.132165



  • Emerson H.P., C.I. Pearce, C.H. Delegard, K.J. Cantrell, M. Snyder, M. Thomas, and B.N. Gartman, et al. 2021. "Influences on Subsurface Plutonium and Americium Migration." ACS Earth and Space Chemistry 5, no. 2:279-294. PNNL-SA-147891. doi:10.1021/acsearthspacechem.0c00277


  • Cordova E., V.A. Garayburu-Caruso, C.I. Pearce, K.J. Cantrell, J.W. Morad, E.C. Gillispie, and B.J. Riley, et al. 2020. "Hybrid Sorbents for 129I Capture from Contaminated Groundwater." ACS Applied Materials & Interfaces 12, no. 23:26113-26126. PNNL-SA-147889. doi:10.1021/acsami.0c01527
  • Garayburu-Caruso V.A., R.E. Danczak, J.C. Stegen, L. Renteria, M.L. McCall, A.E. Goldman, and R.K. Chu, et al. 2020. "Using Community Science to Reveal the Global Chemogeography of River Metabolomes." Metabolites 10, no. 12:518. PNNL-SA-157277. doi:10.3390/metabo10120518
  • Li M., R. Li, Y. Gao, C.T. Resch, W. Qian, T. Shi, and L. Shi, et al. 2020. "Nitrate bioreduction dynamics in hyporheic zone sediments under cyclic changes of chemical compositions." Journal of Hydrology 585. PNNL-SA-152190. doi:10.1016/j.jhydrol.2020.124836
  • Rod K.A., C.A. Fernandez, P.K. Koech, G.L. Dai, M. Correa, N.J. Huerta, and S.D. Burton, et al. 2020. "Self-Repairing Polymer-Modified Cements for High Temperature Geothermal and Fossil Energy Applications." Geothermics 85. PNNL-SA-140314. doi:10.1016/j.geothermics.2019.101790
  • Szecsody J.E., H.P. Emerson, C.I. Pearce, B.N. Gartman, C.T. Resch, and S. Di Pietro. 2020. "In situ reductive dissolution to remove Iodine-129 from aquifer sediments." Journal of Environmental Radioactivity 216. PNNL-SA-142245. doi:10.1016/j.jenvrad.2020.106182
  • Zachara J.M., X. Chen, X. Song, P. Shuai, C.J. Murray, and C.T. Resch. 2020. "Kilometer-scale hydrologic exchange flows in a gravel bed river corridor and their implications to solute migration." Water Resources Research 56, no. 2:Article NO. e2019WR025258. PNNL-SA-137616. doi:10.1029/2019WR025258


  • Devetter B.M., C.T. Resch, T.L. Myers, J.F. Corbey, M.K. Kelly-Gorham, B.D. Cannon, and N.K. Scharko, et al. 2019. "Fixed-Angle Reflectance from Uranium Compounds and U-Bearing Minerals: Experimental Challenges to Determine the Optical Constants n and k." In Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing XX, April 14-18, 2019, Baltimore, MD. Proceedings of the SPIE, edited by JA Guicheteau and CR Howle, 11010, Paper No. 110100S. Bellingham, Washington:SPIE. PNNL-SA-143056. doi:10.1117/12.2519504


  • De Vetter B.M., T.L. Myers, B.D. Cannon, N.K. Scharko, M.K. Kelly-Gorham, J.F. Corbey, and A.L. Schemer-Kohrn, et al. 2018. "Optical and Chemical Characterization of Uranium Dioxide (UO2) and Uraninite Mineral: Calculation of the Fundamental Optical Constants." Journal of Physical Chemistry A 122, no. 35:7062-7070. PNNL-SA-135514. doi:10.1021/acs.jpca.8b05943
  • Pearce C.I., R.J. Serne, S.A. Saslow, W. Um, R.M. Asmussen, M.D. Miller, and O. Qafoku, et al. 2018. "Characterizing Technetium in Subsurface Sediments for Contaminant Remediation." ACS Earth and Space Chemistry 2, no. 11:1145-1160. PNNL-SA-130781. doi:10.1021/acsearthspacechem.8b00077
  • Pearce C.I., S.A. Saslow, R.M. Asmussen, W. Um, J.N. Serne, M.D. Miller, and O. Qafoku, et al. 2018. "Exploiting Knowledge of Technetium in the Subsurface to Develop Remediation Strategies - 18223." In Proceedings of the 44th Annual Waste Management Conference (WM2018), Nuclear and Industrial Robotics, Remote Systems and Other Emerging Technology, March 18-22, 2018, Phoenix, AZ, 8, 5082-5090. Tempe, Arizona:Waste Management Symposia, Inc. PNNL-SA-130601.


  • Goldman A.E., E.B. Graham, A.R. Crump, D.W. Kennedy, E.B. Romero, C.G. Anderson, and K.L. Dana, et al. 2017. "Biogeochemical cycling at the aquatic-terrestrial interface is linked to parafluvial hyporheic zone inundation history." Biogeosciences 14, no. 18:4229-4241. PNNL-SA-123674. doi:10.5194/bg-14-4229-2017
  • Graham E.B., A.R. Crump, C.T. Resch, S.J. Fansler, E.V. Arntzen, D.W. Kennedy, and J.K. Fredrickson, et al. 2017. "Deterministic influences exceed dispersal effects on hydrologically-connected microbiomes." Environmental Microbiology 19. PNNL-SA-122625. doi:10.1111/1462-2920.13720
  • Graham E.B., J.C. Stegen, A.R. Crump, C.T. Resch, S.J. Fansler, E.V. Arntzen, and D.W. Kennedy, et al. 2017. "Organic carbon thermodynamics elucidate spatiotemporal mechanisms governing hyporheic zone biogeochemical cycling." In Proceedings of the Subsurface Biogeochemical Research and Terrestrial Ecosystem Science Joint Meeting April 25-26, 2017, Potomac, Maryland. Washington, District Of Columbia:US Department of Energy, Office of Biological and Environmental Research. PNNL-SA-125130.
  • Graham E.B., M.M. Tfaily, A.R. Crump, A.E. Goldman, L.M. Bramer, E.V. Arntzen, and E.B. Romero, et al. 2017. "Carbon inputs from riparian vegetation limit oxidation of physically bound organic carbon via biochemical and thermodynamic processes." Journal of Geophysical Research: Biogeosciences 122, no. 12:3188-3205. PNNL-SA-125144. doi:10.1002/2017JG003967
  • Li M., Y. Gao, W. Qian, L. Shi, Y. Liu, W.C. Nelson, and C.D. Nicora, et al. 2017. "Targeted quantification of functional enzyme dynamics in environmental samples for microbially mediated biogeochemical processes." Environmental Microbiology Reports 9, no. 5:512-521. PNNL-SA-120732. doi:10.1111/1758-2229.12558
  • Qafoku O., C.I. Pearce, A. Neumann, L. Kovarik, M. Zhu, E.S. Ilton, and M.E. Bowden, et al. 2017. "Tc(VII) and Cr(VI) Interaction with a Naturally Reduced Ferruginous Smectite from the Redox Transition Zone." Environmental Science & Technology 51, no. 16:9042-9052. PNNL-SA-127378. doi:10.1021/acs.est.7b02191
  • Szecsody J.E., M.J. Truex, B.D. Lee, C.E. Strickland, J.J. Moran, M. Snyder, and C.T. Resch, et al. 2017. Geochemical, Microbial, and Physical Characterization of 200-DV-1 Operable Unit Cores from Boreholes C9552, C9487, and C9488, Hanford Site Central Plateau. PNNL-26266. Richland, WA: Pacific Northwest National Laboratory.
  • Truex M.J., J.E. Szecsody, N. Qafoku, C.E. Strickland, J.J. Moran, B.D. Lee, and M. Snyder, et al. 2017. Contaminant Attenuation and Transport Characterization of 200-DV-1 Operable Unit Sediment Samples. PNNL-26208. Richland, WA: Pacific Northwest National Laboratory. Contaminant Attenuation and Transport Characterization of 200-DV-1 Operable Unit Sediment Samples">doi:10.2172/1368134.Contaminant Attenuation and Transport Characterization of 200-DV-1 Operable Unit Sediment Samples
  • Ward J.D., M.E. Bowden, C.T. Resch, G.C. Eiden, D. Pemmaraju, D. Prendergast, and A.M. Duffin. 2017. "Identifying Anthropogenic Uranium Compounds Using Soft X-Ray Near-Edge Absorption Spectroscopy." Spectrochimica Acta. Part B, Atomic Spectroscopy 127. PNNL-SA-115752. doi:10.1016/j.sab.2016.11.008


  • Graham E.B., A.R. Crump, C.T. Resch, S.J. Fansler, E.V. Arntzen, D.W. Kennedy, and J.K. Fredrickson, et al. 2016. "Coupling spatiotemporal community assembly processes to ecosystem function." Frontiers in Microbiology 7. PNNL-SA-118464. doi:10.3389/fmicb.2016.01949
  • Stegen J.C., A. Konopka, J. McKinely, C.J. Murray, X. Lin, M.D. Miller, and D.W. Kennedy, et al. 2016. "Coupling among Microbial Communities, Biogeochemistry, and Mineralogy across Biogeochemical Facies." Scientific Reports. PNNL-SA-117630. doi:10.1038/srep30553
  • Stegen J.C., J.K. Fredrickson, M.J. Wilkins, A. Konopka, W.C. Nelson, E.V. Arntzen, and W.B. Chrisler, et al. 2016. "Groundwater-Surface Water Mixing Shifts Ecological Assembly Processes and Stimulates Organic Carbon Turnover." Nature Communications 7. PNNL-SA-111962. doi:10.1038/ncomms11237
  • Ward J.D., M.E. Bowden, C.T. Resch, S.C. Smith, B.K. McNamara, E.C. Buck, and G.C. Eiden, et al. 2016. "Identification of Uranyl Minerals Using Oxygen K-Edge X Ray Absorption Spectroscopy." Geostandards and Geoanalytical Research 40, no. 1:135-148. PNNL-SA-105197. doi:10.1111/j.1751-908X.2015.00337.x
  • Zachara J.M., J.J. Moran, C.T. Resch, S.R. Lindemann, A.R. Felmy, M.E. Bowden, and A.B. Cory, et al. 2016. "Geo- and Biogeochemical Processes in a Heliothermal Hypersaline Lake." Geochimica et Cosmochimica Acta 181. PNNL-SA-108309. doi:10.1016/j.gca.2016.02.001


  • Converse B., J.P. McKinley, C.T. Resch, and E.E. Roden. 2015. "Microbial mineral colonization across a subsurface redox transition zone." Frontiers in Microbiology 6. PNNL-SA-112780. doi:10.3389/fmicb.2015.00858
  • Lee J., J.K. Fredrickson, A.E. Plymale, A. Dohnalkova, C.T. Resch, J.P. McKinley, and L. Shi. 2015. "An autotrophic H2-oxidizing, nitrate-respiring, Tc(VII)-reducing A cidovorax sp. isolated from a subsurface oxic-anoxic transition zone." Environmental Microbiology Reports 7, no. 3:395-403. PNNL-SA-97986. doi:10.1111/1758-2229.12263
  • Liu Y., C. Liu, R.K. Kukkadapu, J.P. McKinley, J.M. Zachara, A.E. Plymale, and M.D. Miller, et al. 2015. "99Tc(VII) Retardation, Reduction, and Redox Rate Scaling in Naturally Reduced Sediments." Environmental Science & Technology 49, no. 22:13403-13412. PNNL-SA-111587. doi:10.1021/acs.est.5b03273
  • Mouser P.J., A.L. N'Guessan, N. Qafoku, M. Sinha, K.H. Williams, M. Dangelmayr, and C.T. Resch, et al. 2015. "Influence of Carbon and Microbial Community Priming on the Attenuation of Uranium in a Contaminated Floodplain Aquifer." Groundwater 53, no. 4:600-613. PNNL-SA-99197. doi:10.1111/gwat.12238
  • Yan S., Y. Liu, C. Liu, L. Shi, J. Shang, H. Shan, and J.M. Zachara, et al. 2015. "Nitrate bioreduction in redox-variable low permeability sediments." Science of the Total Environment 539. PNNL-SA-105761. doi:10.1016/j.scitotenv.2015.08.122


  • Lee J., J.M. Zachara, J.K. Fredrickson, S.M. Heald, J.P. McKinley, A.E. Plymale, and C.T. Resch, et al. 2014. "Fe(II)- and Sulfide-Facilitated Reduction of 99Tc(VII)O4- in Microbially Reduced Hyporheic Zone Sediments." Geochimica et Cosmochimica Acta 136. PNNL-SA-97893. doi:10.1016/j.gca.2013.08.017
  • Pearce C.I., J. Liu, D.R. Baer, O. Qafoku, S.M. Heald, E. Arenholz, and A.E. Grosz, et al. 2014. "Characterization of natural titanomagnetites (Fe3-xTixO4) for studying heterogeneous electron transfer to Tc(VII) in the Hanford subsurface." Geochimica et Cosmochimica Acta 128. PNNL-SA-100342. doi:10.1016/j.gca.2013.12.010
  • Szecsody J.E., S. Comfort, H.L. Fredrickson, R.G. Riley, F.H. Crocker, P. Shea, and J.P. McKinley, et al. 2014. "In Situ Degradation and Remediation of Energetics TNT, RDX, HMX, and CL-20 and a Byproduct NDMA in the Sub-surface Environment." In Biological Remediation of Explosive Residues. Environmental Science and Engineering, edited by SN Singh. 313-369. New York, New York:Springer. PNNL-SA-95637.


  • Szecsody J.E., M.J. Truex, N. Qafoku, D.M. Wellman, C.T. Resch, and L. Zhong. 2013. "Influence of Acidic and Alkaline Waste Solution Properties on Uranium Migration in Subsurface Sediments." Journal of Contaminant Hydrology 151. PNNL-SA-96107. doi:10.1016/j.jconhyd.2013.05.009


  • Lee J., J.K. Fredrickson, R.K. Kukkadapu, M.I. Boyanov, K.M. Kemner, X. Lin, and D.W. Kennedy, et al. 2012. "Microbial Reductive Transformation of Phyllosilicate Fe(III) and U(VI) in Fluvial Subsurface Sediments." Environmental Science & Technology 46, no. 7:3721-3730. PNNL-SA-79333. doi:10.1021/es204528m
  • Lin X., D.W. Kennedy, A.D. Peacock, J.P. McKinley, C.T. Resch, J.K. Fredrickson, and A. Konopka. 2012. "Distribution of microbial biomass and the potential for anaerobic respiration in Hanford Site 300 Area subsurface sediment." Applied and Environmental Microbiology 78, no. 3:759-767. PNNL-SA-78604.
  • Lin X., J.P. McKinley, C.T. Resch, R.M. Kaluzny, C. Lauber, J.K. Fredrickson, and R.C. Knight, et al. 2012. "Spatial and temporal dynamics of the microbial community in the Hanford unconfined aquifer." The ISME Journal 5. PNNL-SA-85860. doi:10.1038/ismej.2012.26
  • Peretyazhko T., J.M. Zachara, R.K. Kukkadapu, S.M. Heald, I.V. Kutnyakov, C.T. Resch, and B.W. Arey, et al. 2012. "Pertechnetate (TcO4-) reduction by reactive ferrous iron forms in naturally anoxic, redox transition zone sediments from the Hanford Site, USA." Geochimica et Cosmochimica Acta 92. PNNL-SA-84692.
  • Plymale A.E., V.L. Bailey, J.K. Fredrickson, S.M. Heald, E.C. Buck, L. Shi, and Z. Wang, et al. 2012. "Biotic and Abiotic Reduction and Solubilization of Pu(IV)O2·xH2O(am) as Affected by Anthraquinone-2,6-disulfonate (AQDS) and Ethylenediaminetetraacetate (EDTA)." Environmental Science & Technology 46, no. 4:2132-2140. PNNL-SA-82367. doi:10.1021/es2030752


  • Plymale A.E., J.K. Fredrickson, J.M. Zachara, A. Dohnalkova, S.M. Heald, D.A. Moore, and D.W. Kennedy, et al. 2011. "Competitive Reduction of Pertechnetate (99TcO4-) by Dissimilatory Metal Reducing Bacteria and Biogenic Fe(II)." Environmental Science & Technology 45, no. 3:951-957. PNNL-SA-77182.
  • Wang Z., J.M. Zachara, J.F. Boily, Y. Xia, C.T. Resch, D.A. Moore, and C. Liu. 2011. "Determining Individual Mineral Contributions To U(VI) Adsorption In A Contaminated Aquifer Sediment: A Fluorescence Spectroscopy Study." Geochimica et Cosmochimica Acta 75, no. 10:2965-2979. PNNL-SA-75951.


  • Kukkadapu R.K., N. Qafoku, B.W. Arey, C.T. Resch, and P.E. Long. 2010. "Effect of Extent of Natural Subsurface Bioreduction on Fe-mineralogy of Subsurface Sediments." Journal of Physics: Conference Series 217, no. 1:012047 1-8. PNNL-SA-69002. doi:10.1088/1742-6596/217/1/012047
  • Qafoku N., P.E. Dresel, E.S. Ilton, J.P. McKinley, and C.T. Resch. 2010. "Chromium transport in an acidic waste contaminated subsurface medium: The role of reduction." Chemosphere 81, no. 11:1492-1500. PNNL-SA-71074. doi:10.1016/j.chemosphere.2010.08.043
  • Szecsody J.E., L. Zhong, M.J. Truex, C.T. Resch, and M.D. Williams. 2010. "Use of Gas Transported Reactants for Uranium Remediation in Vadose Zone Sediments." In 36th Annual Radioactive Waste Management Symposia, WM 2010, March 7-11, Phoenix, AZ, 4, 3418-3430. Tucson, Arizona:Waste Management Symposia, Inc. PNNL-SA-69758.


  • Baldwin B.R., A.D. Peacock, M. Gan, C.T. Resch, E.V. Arntzen, A.N. Smithgall, and S. Pfiffner, et al. 2009. "In-Well Sediment Incubators to Evaluate Microbial Community Stability and Dynamics following Bioimmobilization of Uranium." Remediation 19, no. 4:73-89. PNNL-SA-67155. doi:10.1002/rem.20218
  • Qafoku N., R.K. Kukkadapu, J.P. McKinley, B.W. Arey, S.D. Kelly, C.M. Wang, and C.T. Resch, et al. 2009. "Uranium in Framboidal Pyrite from a Naturally Bioreduced Alluvial Sediment." Environmental Science & Technology 43, no. 22:8528-8534. PNNL-SA-65650. doi:10.1021/es9017333


  • Baldwin B.R., A.D. Peacock, M.M. Park, D. Ogles, J.D. Istok, J.P. McKinley, and C.T. Resch, et al. 2008. "Multilevel samplers as microcosms to assess microbial response to biostimulation." Ground Water 46, no. 2:295-304. PNNL-SA-52626. doi:10.1111/j.1745-6584.2007.00411.x
  • Faybishenko B., T.C. Hazen, P.E. Long, E.L. Brodie, M.S. Conrad, S. Hubbard, and J.N. Christensen, et al. 2008. "In Situ Long-Term Reductive Bioimmobilization of Cr(VI) in Groundwater Using Hydrogen Release Compound." Environmental Science & Technology 42, no. 22:8478-8485. PNNL-SA-60732. doi:10.1021/es801383r
  • N'Guessan A.L., H.A. Vrionis, C.T. Resch, P.E. Long, and D.R. Lovley. 2008. "Sustained Removal of Uranium From Contaminated Groundwater Following Stimulation of Dissimilatory Metal Reduction." Environmental Science & Technology 42, no. 8:2999-3004. PNNL-SA-60011. doi:10.1021/es071960p
  • Peretyazhko T., J.M. Zachara, S.M. Heald, B. Jeon, R.K. Kukkadapu, C. Liu, and D.A. Moore, et al. 2008. "Heterogeneous Reduction of Tc(VII) by Fe(II) at the Solid-Water Interface." Geochimica et Cosmochimica Acta 72, no. 6:1521-1539. PNNL-SA-56929. doi:10.1016/j.gca.2008.01.004
  • Peretyazhko T., J.M. Zachara, S.M. Heald, R.K. Kukkadapu, C. Liu, A.E. Plymale, and C.T. Resch. 2008. "Reduction of Tc(VII) by Fe(II) Sorbed on Al (hydr)oxides." Environmental Science & Technology 42, no. 15:5499-5506. PNNL-SA-58538. doi:10.1021/es8003156


  • Yabusaki S.B., Y. Fang, P.E. Long, C.T. Resch, A.D. Peacock, J. Komlos, and P.R. Jaffe, et al. 2007. "Uranium Removal from Groundwater via In Situ Biostimulation: Field-Scale Modeling of Transport and Biological Processes." Journal of Contaminant Hydrology 93, no. 2007:216-235. PNNL-SA-50626. doi:10.1016/j.jconhyd.2007.02.005


  • Vrionis H.A., R.T. Anderson, I. Ortiz-Bernad, K.R. O'Neill, C.T. Resch, A.D. Peacock, and R. Dayvault, et al. 2005. "Microbiological and Geochemical Heterogeneity in an In Situ Uranium Bioremediation Field Site." Applied and Environmental Microbiology 71, no. 10:6308 - 6318. PNNL-SA-46061.


  • Hu J.Z., R.A. Wind, J.S. Mclean, Y.A. Gorby, C.T. Resch, and J.K. Fredrickson. 2004. "High Resolution 1H NMR Spectroscopy of Metabolically Active Microorganisms Using Non-Destructive Magic Angle Spinning." Spectroscopy 19, no. 12:98-103. PNNL-SA-42335.


  • Anderson R.T., H.A. Vrionis, I. Ortiz-Bernad, C.T. Resch, P.E. Long, R.D. Dayvault, and K. Karp, et al. 2003. "Stimulating the In Situ Activity of Geobacter Species to Remove Uranium from the Groundwater of a Uranium-Contaminated Aquifer." Applied and Environmental Microbiology 69, no. 10:5884-5891. PNNL-SA-39757.



  • Zachara J.M., C.T. Resch, and S.C. Smith. 1994. "Influence of Humic Substances CO2+ Sorption by a Subsurface Mineral Separate and its Mineralogic Components." Geochimica et Cosmochimica Acta 58, no. 2:553-566. PNL-SA-21122. doi:10.1016/0016-7037(94)90488-X


  • Zachara J.M., S.C. Smith, J.P. McKinley, and C.T. Resch. 1993. "Cadmium Sorption on Specimen and Soil Smectites in Sodium and Calcium Electrolytes." Soil Science Society of America Journal 57, no. 6:1491-1501. BN-SA-3392. doi:10.2136/sssaj1993.03615995005700060017x


  • Cowan C.E., J.M. Zachara, S.C. Smith, and C.T. Resch. 1992. "Individual Sorbent Contributions to Cadmium Sorption on Ultisols of Mixed Mineralogy." Soil Science Society of America Journal 56, no. 4:1084-1094. BN-SA-3351. doi:10.2136/sssaj1992.03615995005600040013x
  • Zachara J.M., S.C. Smith, C.T. Resch, and C.E. Cowan. 1992. "Cadmium Sorption to Soil Separates Containing Layer Silicates and Iron and Aluminum Oxides." Soil Science Society of America Journal 56, no. 4:1074-1084. BN-SA-3325. doi:10.2136/sssaj1992.03615995005600040012x

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