Current Group Members


Dr. Jeffrey Hudson is a postdoctoral scholar advised by Dr. Tratnyek since May of 2022. He is currently working on an electroanalytical method to characterize the redox behavior of activated carbon for the ultimate purpose of environmental remediation of nitroaromatic compounds (e.g. NB, TNT). His broader research interests include understanding biogeochemical redox cycles (i.e., where are the electrons going?), geobatteries, and electroanalytical chemistry. He received his Ph.D. in Civil Engineering from the University of Delaware, along with an B.S. and M.S. in Geosciences from Michigan State University and Western Michigan University, respectively. Profiles: Google Scholar and LinkedIn.


Dr. Trever Schwichtenberg is working as a Postdoctoral Scholar advised by Dr. Tratnyek. He is working on a treatment method for Per- and Polyfluoroalkyl Substances (PFAS) and quantifying treatment with a fluoride ion-selective electrode and LC-MS/MS. His broader research interests are in PFAS fate, transport, and behavior, nontargeted analysis using high-resolution mass spectrometry (HRMS), and applying machine learning to chemical data. He received his Ph.D. in analytical chemistry from Oregon State University and his B.A. in chemistry from Luther College. Profiles: Google Scholar

Recent Major Collaborators

  • Eric Bylaska, Pacific Northwest National Laboratory, Environmental Molecular Sciences Laboratory Richland, WA. Profiles: PNNL, Google Scholar.
  • Shujuan Zhang, School of the Environment, Nanjing University Nanjing, China. Profiles: Nanjing University, Google Scholar.

Group Alumni

  • Graham O'Brien Johnson, Lab Manager B.S. Oregon State University.
  • Ania S. Pavitt, Postdoctoral Fellow. Ph.D. Oregon Health & Science University.
  • Ying Lan, Postdoc. Ph.D. University of Oklahoma.
  • Miranda Bradley, Ph.D. Student. B.S. Portland State University.
  • Chuanyu Qin, Visiting Professor. Jilin University, Shanghai, China. 2018
  • Hejie Qin, Visiting Ph.D. Student. Tongji University, Shanghai, China.
  • Dimin Fan, Ph.D. (ESE). M.S. University of Delaware; B.S. Nanjing University. Currently: ORISE Fellow, Superfund Office, U.S. EPA, Washington, DC
  • Alexanda J. Salter, Ph.D.(ESE). Currently: CH2M Hill, Portland, OR
  • Shengwen Chen, Visiting Scientist. Shanghai Second Polytechnic University, China. 2014
  • Chunhua Zhu, Visiting Faculty, Shangong University, Shangdong, China
  • Bingliang Zhang, Visiting Ph.D. Student. Shangong University, Shangdong, China.
  • James T. Nurmi, Ph.D. (ESE), 1/2005-9/2011, B.S., Gustavus Adolphus College. Currently: Instructor, Water & Environmental Technology Program, Clackamas Community College, Oregon City, OR.
  • Zhenqing Shi, Senior Research Associate 10/2009-12/2011. Ph.D. University of Delaware; M.S. Chinese Academy of Sciences; B.S. Tsinghua University. Currently: Professor, School of the Environment and Energy, South China University of Technology, Guangzhou, P.R. China.
  • Roberto P. Anitori, Senior Research Associate 000-000 (with Brad Tebo) Ph.D. University of New South Wales, Australia.
  • Amanda L. Mather, Research Associate 000-000 B.S. Oregon State University., Currently: Ph.D. student (ESE) at OHSU with Rick Johnson
  • Vaishnavi Sarathy, Ph.D. student (ESE), 2002-2009. M.S. Environmental Engineering, University of Delaware (2002); M.S. Chemistry, India Institute of Technology. Currently: Science Educator.
  • Eunju Kim, Visiting Ph.D. Student, 20??. Ph.D. Pohang Institute of Science and Technology (POSTECH)
  • Ji-hun Kim, Visiting Ph.D. Student, 2006-2008. Ph.D. Pohang Institute of Science and Technology (POSTECH)
  • Clinton D. Church, Ph.D. Student 200?-200? M.I.S. Geology/Microbiology (1995), University of Montana; B.A. Math/Science Education, Geology Minor (1988), University of Montana. Currently: Chemist at USDA.
  • Pue Sze (Priscilla) Lee, Postdoc, 2006-2007. Ph.D. Chinese University of Hong Kong
  • Jae-Hyoun Kim, Sabbatical guest, 2005-2006. Professor, Dongduk Womens University in Seoul, Republic of Korea.
  • Joel Z. Bandstra, Ph.D. 2005. Postdoc. Center for Environmental Kinetic Analysis, University of Pennsylvania; B.S. Civil and Environmental Engineering (1998), Clarkson University. Currently: Associate Professor, Saint Francis University, Loretto, PA.
  • Bumhan Bae, Sabbatical guest, 2003-2005. Professor, Department of Civil & Environmental Engineering Gachon University, SungNam, Kyunggi, Korea.
  • Thomas H. Marshall, Ph.D. 2000. M.S. Loyola Marymount University (1993). Currently: Lecturer, Ohio State University.
  • Rachel H. Waldemer, Research Associate. M.S. Environmental Science and Engineering, OGI/OHSU; B.S. Biochemistry, Iowa State University (2000).
  • Jaimie S. Powell, Research Associate. Ph.D. Entomology (2002), University of Wisconsin, Madison.
  • Anna M. Farrenkopf, Postdoctoral Research Assistant. Ph.D. Chemical Oceanography (date?), University of Delaware, Lewes, DL; M.S. Marine Studies, University of Delaware, Lewes, DL, 1993; B.S. Chemistry, University of Massachusetts Boston, MA, 1990.
  • Timothy L. Johnson, Ph.D. 1997. Postdoctoral Fellow, Oregon Graduate Institute (Dates?); B.S. Geology (1990), University of Arkansas. Currently: Project Manager, Earth and Environmental, AMEC, Portland, OR.
  • Abinash Agrawal, M.S. 1995. M.S. Geology (1980), Banaras Hindu University; Ph.D. Geology (1990), Ph.D. University of North Carolina; NSERC Postdoctoral Fellow (1994), Geological Survey of Canada, Atlantic Geoscience Centre, Dartmouth, Nova Scotia; Postdoctoral Fellow (1995) Oak Ridge National Laboratory. Currently: Professor, Wright State University, Dayton, OH.
  • Kyoohong Park, Sabbatical guest, 2001-2002. Associate Professor, Department of Civil Engineering, Chung-Ang University, Ansung, Korea.
  • Mark Daniel McCubbery, Dreyfus Foundation Environmental Chemistry Postdoctoral Fellow, 1999/2000. Ph.D. Physical Chemistry, LaTrobe University, Bundoora, Australia.
  • Rosemarie Miehr (Spaeth), Senior Research Associate. Ph.D. Analytical and Environmental Chemistry (1998), Technical University of Munich, Germany.
  • Thea E. Reilkoff (Kaldor), M.S. 2000. B.A. Chemistry (1997), Mayville State University, Mayville, ND. Currently: Patent Attorney
  • Michelle M. Scherer, Ph.D. 1998. M.S. Civil and Environmental Engineering (1994), University of Connecticut; B.S. Systems Engineering (1989), University of Virginia. Currently: Professor and Department Head, University of Iowa, Iowa City, IA.
  • Barbara A. Balko, Petroleum Research Fund, Research Fellow, 1996 and 1997. Ph.D. University of California, Berkeley, CA; B.A. Bryn Mawr College, PA. Currently: Associate Professor, Lewis & Clark College, Portland, OR.
  • Leah J. Matheson, Ph.D. 1994. B.S. Bacteriology/Public Health (1985), Washington State University; National Research Council Post-Doctoral Associate (1995), U.S. Environmental Protection Agency, Athens, GA; Research Fellow, U.S. Geological Survey, Menlo Park, CA. Currently: Microbiologist, MSE Technology Applications, Butte, MT.