• Ph.D., 2001, Aqueous Geochemistry, University of Nevada, Reno, USA
  • M.S., 1994, Geology (Geophysics), Yonsei University, Seoul, Korea
  • B.S., 1990, Geology, Yonsei University, Seoul, Korea
  • Visiting professor in Division of Advanced Nuclear Engineering (DANE), WCU program, Pohang University of Science and Technology (POSTECH): December 2010 – Present
  • Senior Research Scientist II in PNNL : January 2010 – Present
  • Senior Research Scientist I in PNNL : July 2006 – Dec. 2009
  • Adjunct Professor at Washington State University at Tricity : June 2004 - Present
  • Research Scientist in PNNL : March 2004 – June 2006
  • Postdoctoral Associate in PNNL : March 2002 – February 2004
  • Postdoctoral Associate in Desert Research Institute (DRI) : June 2001 – February 2002
  • Graduate Research Assistant in DRI : September 1998 – May 2001
  • Metal and radioactive wastes isolation and immobilization techniques development
  • Performance assessment of low-level radioactive waste repository
  • Contaminated soils characterization and remediation method developmen
  • In situ X-ray Absorption Spectroscopy (XAS) for sorption at the soil/water inter
  • Sorption and desorption studies of heavy metals and radionuclides
  • Rate and mass transfer studies of solute uptake by earth materials.
  • Geochemical surface complexation modeling of ion sorption/desorption
  • X-ray Photoelectron Spectroscopy (XPS) for studies of surface complexe
  • Pore structure and diffusion measurements using X-ray Micro-Tomography (XM
  • Metal complex and speciation affecting on bioavailability and toxicity
  • Fate and transport of metal and radionuclides (As, Se, I, Cr, U, and Tc)
  • Modified zeolites or synthesis of novel nanoporous sorbents
  • Reactive transport modeling of radionuclides and metals coupled with biogeochemical reactions.
  • Reclamation and remediation of acid mine drainage (AMD)
  • Deep geological CO2 sequestration and geochemical reaction model
  • Biological remediation of contaminated soils and groundwater
  • dioxide under geologic sequestration conditions using X-ray computed
  • Wang G. and Wooyong Um. 2012. “Mineral dissolution and secondary precipitation on quartz
  • Um W., HS Chang, JP Icenhower, WW Lukens, RJ Serne, NP Qafoku, RK Kukkadapu, and JH
  • Crandell LE, CA Peters, Wooyong Um, KW Jones, and WB Lindquist. 2012. "Changes in the
  • Chung CW, Wooyong Um, MM Valenta, SK Sundaram, Jaehun Chun, Kent E. Parker, ML
  • Chang H-S., Wooyong Um, K Rod, RJ Serne, A Thompson, N Perdrial, CI Steefel, and J Chorover. 2011. “Strontium and Cesium Release Mechanisms during Unsaturated Flow through Waste Weathered Hanford Sediments.” Environmental Science and
  • Kim BC, J Lee, Wooyong Um, J Kim, J Joo, JH Lee, JH Kwak, JH Kim, C Lee, H Lee, RS Addleman, T Hyeon, MB Gui, J Kim. 2011. “Magnetic Mesoporous materials for removal of environmental wastes.” Journal of Hazardous Materials, 192, 1140-1147.
  • Um W, H-S Chang, JP Icenhower, WW Lukens, RJ Serne, NP Qafoku, JH Westsik, Jr., EC Buck and SC Smith. 2011. “Immobilization of 99-Technetium (VII) by Fe(II)-Goethite and Limited Reoxidation.” Environmental Science and Technology, 45(11), 4904-4913.
  • Rod KA, Wooyong Um, and M Flury. 2010. “Transport of strontium and cesium in simulated Hanford tank waste leachate through quartz sand under saturated and unsaturated flow.” Environmental Science and Technology, 44(21), 8089-8094.
  • Um W, JM Zachara, C Liu, DA Moore and K Rod. 2010. “Resupply Mechanism to a
  • Um W, JP Icenhower, CF Brown, RJ Serne, Z Wang, CJ Dodge, and AJ Francis. 2010. “Characterization of uranium-contaminated sediments from beneath a nuclear waste storage tank from Hanford, Washington: Implications for contaminant transport and
  • Cai R., WB Lindquist, Wooyong Um, KW Jones. 2009. “Tomographic analysis of reactive flow induced pore structure changes in column experiments.” Advances in Water Resources, 32, 1396-1403.
  • Um W, RJ Serne, Z Wang, CF Brown, BD Williams, CJ Dodge, and AJ Francis. 2009.
  • Um W, RJ Serne, GV Last, RE Clayton, and ET Glossbrenner. 2009. “The effect of gravel size fraction on the distribution coefficients of selected radionuclides.” Journal of Contaminant Hydrology 107: 82-90.
  • Um W, RJ Serne, CF Brown, and K Rod. 2008. “Uranium (VI) sorption on iron oxides in Hanford Site sediment: Application of a surface complexation model.” Applied Geochemistry 23: 2649-2657.
  • Um W, RJ Serne, CF Brown, and GV Last. 2007. “U(VI) Adsorption on 200-UP-1 Aquifer
  • Shin, Y. GE Fryxell, W Um, K Parker, SV Mattigod, and R Skaggs. 2007. “Sulfur- Functionalized Mesoporous Carbon.” Advanced Functional Materials 17: 2897-2901.
  • Um W, RJ Serne, and KM Krupka. 2007. “Surface Complexation Modeling of U(VI) Adsorption to Hanford Sediment with Varying Geochemical Conditions.” Environmental Science and Technology 41 (10): 3587-3592.
  • Um, W, S Mattigod, RJ Serne, GE Fryxell, DH Kim, and LD Troyer. 2007. “Synthesis of nanoporous zirconium oxophosphate and application for removal of U(VI)” Water Research 41(15): 3217-3226.
  • Um W and RJ Serne. 2005. “Sorption and Transport Behavior of Radionuclides in the Proposed Low-Level Radioactive Waste Facility at the Hanford Site, Washington.” Radiochimica Acta 93(1): 57-63.
  • Um W, RJ Serne, SB Yabusaki, and AT Owen. 2005. “Enhanced radionuclide immobilization and flow path modifications by dissolution and secondary precipitates.” Journal of Environmental Quality 34(4): 1404-1414.
  • Um W and C Papelis. 2004. “Metal ion sorption and desorption on zeolitized tuffs from the Nevada Test Site.” Environmental Science and Technology 38(2): 496-502.
  • Um W, RJ Serne, and KM Krupka. 2004. “Linearity and reversibility of iodide adsorption on sediments from Hanford, Washington under water saturated conditions.” Water Research 38(8): 2009-2016.
  • Diallo MS, S Christie, P Swaminathan, L Balogh, X Shi, W Um, C Papelis, WA Goddard III, and JH Johnson Jr. 2004. “Dendritic chelating agents 1. Cu (II) binding to ethylene diamine core poly (amidoamine) dendrimers in aqueous solutions.” Langmuir 20(7):
  • Papelis C, W Um, CE Russell, and JB Chapman. 2003. “Measuring the specific surface area of natural and manmade glasses: Effects of formation process, morphology, and particle size.” Colloids & Surfaces A 215 (1-3): 221-239.
  • Um W and C Papelis. 2003. “Sorption mechanisms of Sr and Pb on zeolitized tuffs from the Nevada Test Site as a function of pH and ionic strength.” American Mineralogist, 88(11-12): 2028-2039.
  • Um W and C Papelis. 2002. “Geochemical effects on colloid-facilitated metal transport through zeolitized tuffs from the Nevada Test Site.” Environmental Geology 43(1-2): 209-218.
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