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Energy and Environment Directorate

Guohui Wang

Guohui Wang

Pacific Northwest National Laboratory
PO Box 999
Richland, WA 99352
(509) 375-2997

Biography

Guohui Wang has over 20 years of experience in environmental hydrogeochemistry. His research goal is to understand the geochemical processes which control the fate and transport of contaminants in soils/sediments and groundwater, thus to develop related remediation and waste disposal technologies. Since joining PNNL in 2010, his work has focused primarily on waste stream radionuclide treatment by waste forms and iron spinel, subsurface transport and in situ contaminants remediation technology, gas phase transport in porous media, as well as impacts of CO2 sequestration on groundwater quality.

Research Interests

  • sorption/desorption, abiotic degradation, diffusion transport of radionuclides and organic contaminants in the subsurface;
  • redox and radioactive waste sequestration in iron oxide minerals;
  • development and performance assessment of low-level radioactive waste forms; in situ contaminants immobilization and remediation technique development;
  • mineral dissolution/co-precipitation/transformation processes and spectroscopy techniques (XRD, SEM/FIB-TEM/EDS, XPS, XAFS, XMT) for mineral and pore structure characterization;
  • reactive transport of noble gas and VOCs in porous media; CO2 intrusion impacts on geochemistry of aquifers;
  • partitioning of oil contaminants between crude oil/water/CO2 phases, and physicochemical characterization of aquifer heterogeneity.

Education and Credentials

  • Ph.D., Environmental Hydrogeochemistry, University of Tübingen, Germany
  • M.S., Tropical Hydrogeology, University of Tübingen, Germany
  • M.S. & B.S., Quaternary Geology & Geography, Shaanxi Normal University, China

PNNL Publications

2023

  • Singh B., N. Mahzan, N. Rashid, S. Isa, M. Hafeez, S.A. Saslow, and G. Wang, et al. 2023. "Design and Application of Materials for Sequestration and Immobilization of 99Tc." Environmental Science & Technology 57, no. 17:6776-6798. PNNL-SA-175772. doi:10.1021/acs.est.3c00129

2022

  • Cantrell K.J., G. Wang, A.V. Mitroshkov, and J.D. Lowrey. 2022. "Noble Gas Adsorption to Tuff." Journal of Environmental Radioactivity 243. PNNL-SA-154712. doi:10.1016/j.jenvrad.2021.106809
  • Wang G., D. Kim, M.J. Olszta, M.E. Bowden, D.K. Schreiber, S.A. Saslow, and W. Um, et al. 2022. "Metallic Technetium Sequestration in Nickel Core/Shell Microstructure during Fe(OH)2 Transformation with Ni doping." Journal of Hazardous Materials 425. PNNL-SA-146435. doi:10.1016/j.jhazmat.2021.127779

2021

  • Wang G., M.E. Bowden, S.A. Saslow, B.J. Riley, D. Kim, W.C. Eaton, and A.A. Kruger. 2021. "Micrometer-sized Magnetite Synthesis using Fe(OH)2(s) as a Precursor for Technetium Sequestration from Liquid Nuclear Waste Streams." Journal of Nuclear Materials 552. PNNL-SA-158404. doi:10.1016/j.jnucmat.2021.152964
  • Wang G., M.J. Olszta, S.A. Saslow, D. Kim, M.E. Bowden, W. Um, and J. Wang, et al. 2021. "A Focused Ion Beam-Scanning Transmission Electron Microscopy with Energy-Dispersive X-ray Spectroscopy Study on Technetium Incorporation within Iron Oxides through Fe(OH)2(s) Mineral Transformation." ACS Earth and Space Chemistry 5, no. 3:525-534. PNNL-SA-151082. doi:10.1021/acsearthspacechem.0c00305

2020

  • Moore R.C., C.I. Pearce, J.W. Morad, S. Chatterjee, T.G. Levitskaia, R.M. Asmussen, and A.R. Lawter, et al. 2020. "Iodine Immobilization by Materials through Sorption and Redox-Driven Processes: A Literature Review." Science of the Total Environment 716. PNNL-SA-138461. doi:10.1016/j.scitotenv.2019.06.166
  • Pearce C.I., R.C. Moore, J.W. Morad, R.M. Asmussen, S. Chatterjee, A.R. Lawter, and T.G. Levitskaia, et al. 2020. "Technetium Immobilization by Materials through Sorption and Redox-Driven Processes: A Literature Review." Science of the Total Environment 716. PNNL-SA-138464. doi:10.1016/j.scitotenv.2019.06.195
  • Wang G., J.E. Szecsody, N.M. Avalos, N. Qafoku, and V.L. Freedman. 2020. "In situ precipitation of hydrous ferric oxide (HFO) for remediation of subsurface iodine contamination." Journal of Contaminant Hydrology 235. PNNL-SA-147880. doi:10.1016/j.jconhyd.2020.103705

2019

  • Bagwell C.E., C.D. Johnson, G. Wang, D.I. Demirkanli, and M.J. Truex. 2019. Carbon Tetrachloride: Evaluation of Biotic Degradation Mechanisms and Rates. PNNL-28846. Richland, WA: Pacific Northwest National Laboratory. Carbon Tetrachloride: Evaluation of Biotic Degradation Mechanisms and Rates
  • Wang G., N. Qafoku, J.E. Szecsody, C.E. Strickland, C.F. Brown, and V.L. Freedman. 2019. "Time-dependent iodate and iodide adsorption to Fe oxides." ACS Earth and Space Chemistry 3, no. 11:2415-2420. PNNL-SA-142955. doi:10.1021/acsearthspacechem.9b00145
  • Wang G., W. Um, D. Kim, and A.A. Kruger. 2019. "Tc-99 Immobilization from Off-Gas Waste Streams using Nickel-doped Iron Spinel." Journal of Hazardous Materials 364. PNNL-SA-134263. doi:10.1016/j.jhazmat.2018.09.064

2018

  • Luksic S.A., D. Kim, W. Um, G. Wang, M.J. Schweiger, C.Z. Soderquist, and W.W. Lukens, et al. 2018. "Effect of Technetium-99 Sources on Its Retention in Low Activity Waste Glass." Journal of Nuclear Materials 503. PNNL-SA-125641. doi:10.1016/j.jnucmat.2018.02.019
  • 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
  • Perdrial N., A. Vazquez-Ortega, G. Wang, M. Kanematsu, K.T. Mueller, W. Um, and C.I. Steefel, et al. 2018. "Uranium speciation in acid waste-weathered sediments: The role of aging and phosphate amendments." Applied Geochemistry 89. PNNL-SA-133858. doi:10.1016/j.apgeochem.2017.12.001
  • Rod K.A., W. Um, J. Chun, N. Wu, X. Yin, G. Wang, and K. Neeves. 2018. "Effect of Chemical and Physical Heterogeneities on Colloid-Facilitated Cesium Transport." Journal of Contaminant Hydrology 213, no. June 2018:22-27. PNNL-SA-133847. doi:10.1016/j.jconhyd.2018.03.012

2017

  • Saslow S.A., W. Um, R.L. Russell, G. Wang, R.M. Asmussen, and R. Sahajpal. 2017. Updated Liquid Secondary Waste Grout Formulation and Preliminary Waste Form Qualification. PNNL-26443; RPT-SWCS-009 Rev 0. Richland, WA: Pacific Northwest National Laboratory. doi:10.2172/1373004.Updated Liquid Secondary Waste Grout Formulation and Preliminary Waste Form Qualification
  • Strickland C.E., A.R. Lawter, N. Qafoku, J.E. Szecsody, M.J. Truex, and G. Wang. 2017. Evaluation of Iodine Remediation Technologies in Subsurface Sediments: Interim Status Report. PNNL-26957. Richland, WA: Pacific Northwest National Laboratory. doi:10.2172/1418095.Evaluation of Iodine Remediation Technologies in Subsurface Sediments: Interim Status Report
  • Um W., S.A. Luksic, G. Wang, S.A. Saslow, D. Kim, M.J. Schweiger, and C.Z. Soderquist, et al. 2017. "Enhanced 99Tc Retention in Glass Waste Form using Tc(IV)-Incorporated." Journal of Nuclear Materials 495, no. C:455-462. PNNL-SA-123344. doi:10.1016/j.jnucmat.2017.09.007
  • Wang G., W. Um, Z. Wang, E. Reinoso Maset, N.M. Washton, K.L. Mueller, and N. Perdrial, et al. 2017. "Uranium Release from Acidic Weathered Hanford Sediments: Single-Pass Flow-Through and Column Experiments." Environmental Science & Technology 51, no. 19:11011-11019. PNNL-SA-128583. doi:10.1021/acs.est.7b03475

2016

  • Lee M., W. Um, G. Wang, A.A. Kruger, W.W. Lukens, R.J. Rousseau, and V.A. Glezakou. 2016. "Impeding 99Tc(IV) mobility in novel waste forms." Nature Communications 7. PNNL-SA-114552. doi:10.1038/ncomms12067

2015

  • Lawter A.R., N. Qafoku, G. Wang, H. Shao, and C.F. Brown. 2015. "Evaluating Impacts of CO2 Intrusion into an Unconsolidated Aquifer: I. Experimental Data." International Journal of Greenhouse Gas Control 44, no. 2016:323-333. PNNL-SA-107057. doi:10.1016/j.ijggc.2015.07.009
  • Um W., S.A. Luksic, G. Wang, D. Kim, M.J. Schweiger, P.R. Hrma, and A.A. Kruger. 2015. "Development of Tc(IV)-Incorporated Fe Minerals to Enhance 99Tc Retention in Glass Waste Form." In Annual Waste Mangement Symposium (WM2015), March 15 - 19, 2015, Phoenix, Arizona, 7, 5451-5457. Tucson, Arizona:Waste Mangement Symposia, Inc. PNNL-SA-106483.
  • Wang G., N. Qafoku, A.R. Lawter, M.E. Bowden, O. Harvey, E.C. Sullivan, and C.F. Brown. 2015. "Geochemical Impacts of Leaking CO2 from Subsurface Storage Reservoirs to an Unconfined Oxidizing Carbonate Aquifer." International Journal of Greenhouse Gas Control 44, no. 2016:310-322. PNNL-SA-96349. doi:10.1016/j.ijggc.2015.07.002
  • Zheng L., N. Qafoku, A.R. Lawter, G. Wang, H. Shao, and C.F. Brown. 2015. "Evaluating Impacts of CO2 Intrusion into an Unconsolidated Aquifer: II. Modeling Results." International Journal of Greenhouse Gas Control 44, no. 2016:300-309. PNNL-SA-106872. doi:10.1016/j.ijggc.2015.07.001

2014

  • Chung C., J. Chun, G. Wang, and W. Um. 2014. "Effects of Iron Oxides on the Rheological Properties of Cementitious Slurry." Colloids and Surfaces. A, Physicochemical and Engineering Aspects 453. PNNL-SA-102019. doi:10.1016/j.colsurfa.2014.03.072

2013

  • Um W., G. Wang, and R.J. Serne. 2013. "The Effects of Secondary Mineral Precipitates on 90Sr Mobility at the Hanford Site, USA." Procedia Earth and Planetary Science 7. PNNL-SA-100623. doi:10.1016/j.proeps.2013.03.032
  • Wang G., and W. Um. 2013. "Facilitated Strontium Transport by Remobilization of Strontium-Containing Secondary Precipitates in Hanford Site Subsurface." Journal of Hazardous Materials 248-249. PNNL-SA-93191. doi:10.1016/j.jhazmat.2013.01.021

2012

  • Wang G., and W. Um. 2012. "Mineral Dissolution and Secondary Precipitation on Quartz Sand in Simulated Hanford Tank Solutions Affecting Subsurface Porosity." Journal of Hydrology 472-473. PNNL-SA-90409. doi:10.1016/j.jhydrol.2012.09.021

Energy and Environment

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