Earth Scientist
Earth Scientist


Katherine Muller is an Earth scientist at Pacific Northwest National Laboratory (PNNL). She received her doctoral in environmental engineering from Tufts University in Medford, MA and completed her post-doctoral training at Oak Ridge National Laboratory. Her research focuses on linking experimental testing to contaminant fate and transport modeling to understand, predict, and inform subsurface models and remediation.

Disciplines and Skills

  • Environmental chemistry and engineering
  • Environmental remediation and remediation technologies
  • Environmental subsurface science


  • PhD in environmental and water resource engineering, Tufts University, 2016
  • BS in environmental engineering, Tufts University, 2009

Affiliations and Professional Service

  • American Geophysical Union



  • Schwartz G., K.A. Muller, S.S. Rathore, R. Wilpiszeski, A.A. Carrell, M. Cregger, and D.A. Elias, et al. 2022. "Incorporating Concentration-Dependent Sediment Microbial Activity into Methylmercury Production Kinetics Modeling." Environmental Science: Processes & Impacts 24, no. 9:1392-1405. PNNL-SA-164700. doi:10.1039/D1EM00287B


  • Muller K.A., L. Zhong, and C.E. Bagwell. 2021. "Characterizing the Influence of Organic Polymers on the Specific Reactivity of Particulate Remedial Amendments." Frontiers in Environmental Science 9. PNNL-SA-162020. doi:10.3389/fenvs.2021.703851
  • Carrell A.A., G. Schwartz, M. Cregger, C.M. Gionfriddo, D.A. Elias, R. Wilpiszeski, and D.M. Klingeman, et al. 2021. "Nutrient exposure alters microbial composition, structure, and mercury methylating activity in periphyton in a contaminated watershed." Frontiers in Microbiology 12. PNNL-SA-158901. doi:10.3389/fmicb.2021.647861
  • Emerson H.P., J.E. Szecsody, A.R. Lawter, C.D. Halter, A.R. Mangel, E.H. Fernald, and C.T. Resch, et al. 2021. Spectral Induced Polarization-Biogeochemical Relationships for Remediation Amendment Monitoring. PNNL-30440 Rev 1. Richland, WA: Pacific Northwest National Laboratory. Spectral Induced Polarization-Biogeochemical Relationships for Remediation Amendment Monitoring
  • Muller K.A., C.D. Johnson, C.E. Bagwell, and M.J. Truex. 2021. "Methods for Delivery and Distribution of Amendments for Subsurface Remediation: A Critical Review." Groundwater Monitoring and Remediation 41, no. 1:46-75. PNNL-SA-153478. doi:10.1111/gwmr.12418


  • Muller K.A., C.D. Johnson, C.E. Bagwell, and V.L. Freedman. 2019. Review of Amendment Delivery and Distribution Methods, and Relevance to Potential In Situ Source Area Treatment at the Hanford Site. PNNL-29198. Richland, WA: Pacific Northwest National Laboratory. Review of Amendment Delivery and Distribution Methods, and Relevance to Potential In Situ Source Area Treatment at the Hanford Site
  • Schwartz G., T. Olsen, K.A. Muller, and S.C. Brooks. 2019. "Ecosystem controls on methylmercury production by periphyton biofilms in a contaminated stream: Implications for predictive modeling." Environmental Toxicology and Chemistry 38, no. 11:2426-2435. PNNL-SA-147041. doi:10.1002/etc.4551
  • Muller K.A., C.C. Brandt, T.J. Mathews, S.C. Books. 2019. “Methylmercury sorption onto Engineered Materials”. Journal of Environmental Management 245, 481-488 doi: 10.1016/j.jenvman.2019.05.100
  • Muller, K.A., S.C. Brooks. 2019. “Effectiveness of sorbents to reduce mercury methylation” Environmental Engineering Science 36 (3), 361 -371 doi:10.1089/ees.2018.0375


  • Muller, K.A., S. Esfahani, S. Chapra, C.A. Ramsburg. 2018. “Transport and Retention of Concentrated Oil-in-Water Emulsions in Porous Media” Environmental Science & Technology. doi: 10.1021/acs.est.7b06012
  • Muller, K.A., C.A. Ramsburg. 2018. “Influence of Non-Wetting Phase Saturation on Dispersivity in Laboratory-Scale Sandy Porous Media”.  Environmental Engineering Science doi:10.1089/ees.2017.0444
  • Olsen, T.A., K.A. Muller, S.L. Painter, S.C. Brooks. 2018. “Kinetics of Methylmercury Production Revisited” Environmental Science & Technology 52 (4), 2063-2070 doi: 10.1021/acs.est.7b05152