Richard L. Johnson, Ph.D.

  • Professor, OHSU-PSU School of Public Health

Biography

Dr. Richard Johnson is a Professor in the OHSU-PSU School of Public Health (SPH) at the Oregon Health & Science University (OHSU) in Portland Oregon. Dr. Johnson is also the Director of the Environmental Systems and Human Health Program in the SPH. He received his BS degree in Chemistry from the University of Washington and his MS and PhD degrees from the Oregon Graduate Institute (now part of OHSU). Dr. Johnson has been a faculty member at OHSU since 1985. He teaches in the areas of public health relating to climate change, drinking water availability, chemical and transport and fate in the environment and restoration of sites contaminated by industrial and other sources. His research interests involve forecasting of water quality in rivers to protect drinking water sources, development of diagnostic tool for groundwater restoration, and vulnerability of groundwater sources of drinking water.

Education and training

  • Degrees

    • B.S., 1973, University of Washington
    • M.S., 1981, Oregon Graduate Institute
    • Ph.D., 1985, Oregon Graduate Institute

Areas of interest

  • Climate change
  • Water quality

Additional information

Publications

Publications

  • Predicting Abiotic Reduction Rates Using Cryogenically Collected Soil Cores and Mediated Reduction Potential Measurements

    Environmental Science and Technology Letters
    1. Chris M.D. Kocur
    2. Dimin Fan
    3. Paul G. Tratnyek
    4. Richard L. Johnson

  • Cryogenic soil coring reveals coexistence of aerobic and anaerobic vinyl chloride degrading bacteria in a chlorinated ethene contaminated aquifer

    Water Research
    1. Patrick M. Richards
    2. Yi Liang
    3. Richard L. Johnson
    4. Timothy E. Mattes

  • Modeling the Kinetics of Hydrogen Formation by Zerovalent Iron

    Environmental Science and Technology
    1. Hejie Qin
    2. Xiaohong Guan
    3. Joel Z. Bandstra
    4. Richard L. Johnson
    5. Paul G. Tratnyek

  • Chemical Reactivity Probes for Assessing Abiotic Natural Attenuation by Reducing Iron Minerals

    Environmental Science and Technology
    1. Dimin Fan
    2. Miranda J. Bradley
    3. Adrian W. Hinkle
    4. Richard L. Johnson
    5. Paul G. Tratnyek

  • Cryogenic Core Collection (C3) from Unconsolidated Subsurface Media

    GroundWater Monitoring and Remediation
    1. Saeed Kiaalhosseini
    2. Richard L. Johnson
    3. Richard C. Rogers
    4. Maria Irianni Renno
    5. Mark Lyverse
    6. Thomas C. Sale

  • Forecasting Turbidity during Streamflow Events for Two Mid-Atlantic U.S. Streams

    Water Resources Management
    1. Amanda L. Mather
    2. Richard L. Johnson

  • Selectivity of Nano Zerovalent Iron in In Situ Chemical Reduction

    Remediation
    1. Dimin Fan
    2. Denis M. O'Carroll
    3. Daniel W. Elliott
    4. Zhong Xiong
    5. Paul G. Tratnyek
    6. Richard L. Johnson
    7. Ariel Nunez Garcia

  • Sulfidation of nano zerovalent iron (nZVI) for improved selectivity during in-situ chemical reduction (ISCR)

    Environmental Science and Technology
    1. Dimin Fan
    2. Graham O'Brien Johnson
    3. Paul G. Tratnyek
    4. Richard L. Johnson

  • Event-based prediction of stream turbidity using a combined cluster analysis and classification tree approach

    Journal of Hydrology
    1. Amanda L. Mather
    2. Richard L. Johnson

  • Field Deployable Chemical Redox Probe for Quantitative Characterization of Carboxymethylcellulose Modified Nano Zerovalent Iron

    Environmental Science and Technology
    1. Dimin Fan
    2. Shengwen Chen
    3. Richard L. Johnson
    4. Paul G. Tratnyek

  • An analysis of a mixed convection associated with thermal heating in contaminated porous media

    Science of the Total Environment
    1. Magdalena M. Krol
    2. Richard L. Johnson
    3. Brent E. Sleep

  • Quantitative characterization of stream turbidity-discharge behavior using event loop shape modeling and power law parameter decorrelation

    Water Resources Research
    1. Amanda L. Mather
    2. Richard L. Johnson

  • Assessment of anaerobic toluene biodegradation activity by bssA transcript/gene ratios

    Applied and Environmental Microbiology
    1. Christina N. Brow
    2. Reid O.Brien Johnson
    3. Richard L. Johnson
    4. Holly M. Simon

  • Comparison of Disturbed and Undisturbed Soil Core Methods to Estimate Nitrogen-Mineralization Rates in Manured Agricultural Soils

    Communications in Soil Science and Plant Analysis
    1. Dean P. Moberg
    2. Richard L. Johnson
    3. Dan M. Sullivan

  • Cryogenic core collection and preservation of subsurface samples for biomolecular analysis

    GroundWater Monitoring and Remediation
    1. Richard L. Johnson
    2. Christina N. Brow
    3. Reid O.Brien Johnson
    4. Holly M. Simon

  • Field-scale transport and transformation of carboxymethylcellulose- stabilized nano zero-valent iron

    Environmental Science and Technology
    1. Richard L. Johnson
    2. James T. Nurmi
    3. Graham S. O'Brien Johnson
    4. Dimin Fan
    5. Reid L. O'Brien Johnson
    6. Zhenqing Shi
    7. Alexandra J. Salter-Blanc
    8. Paul G. Tratnyek
    9. Gregory V. Lowry

  • Impact of low-temperature electrical resistance heating on subsurface flow and transport

    Water Resources Research
    1. M. M. Krol
    2. B. E. Sleep
    3. R. L. Johnson

  • Modeling discrete gas bubble formation and mobilization during subsurface heating of contaminated zones

    Advances in Water Resources
    1. Magdalena M. Krol
    2. Kevin G. Mumford
    3. Richard L. Johnson
    4. Brent E. Sleep

  • Modeling the potential impact of seasonal and inactive Multi-Aquifer wells on contaminant movement to public Water-Supply wells

    Journal of the American Water Resources Association
    1. R. L. Johnson
    2. B. R. Clark
    3. M. K. Landon
    4. L. J. Kauffman
    5. S. M. Eberts

  • Degradation of 1,2,3-Trichloropropane (TCP)

    Environmental Science and Technology
    1. Vaishnavi Sarathy
    2. Alexandra J. Salter
    3. James T. Nurmi
    4. Graham O.Brien Johnson
    5. Richard L. Johnson
    6. Paul G. Tratnyek

  • Effects of cryogenic preservation and storage on the molecular characteristics of microorganisms in sediments

    Environmental Science and Technology
    1. Christina N. Brow
    2. Reid O.Brien Johnson
    3. Mouzhong Xu
    4. Richard L. Johnson
    5. Holly M. Simon

  • Natural organic matter enhanced mobility of nano zerovalent iron

    Environmental Science and Technology
    1. Richard L. Johnson
    2. Graham O.Brien Johnson
    3. James T. Nurmi
    4. Paul G. Tratnyek

  • Field evidence for flow reduction through a zero-valent iron permeable reactive barrier

    Ground Water Monitoring and Remediation
    1. R. L. Johnson
    2. R. B. Thoms
    3. R. O'Brien Johnson
    4. T. Krug

  • Mineral precipitation upgradient from a zero-valent iron permeable reactive barrier

    Ground Water Monitoring and Remediation
    1. R. L. Johnson
    2. R. B. Thoms
    3. R. O'Brien Johnson
    4. J. T. Nurmi
    5. P. G. Tratnyek

  • Persulfate persistence under thermal activation conditions

    Environmental Science and Technology
    1. Richard L. Johnson
    2. Paul G. Tratnyek
    3. Reid O.Brien Johnson

  • Evaluation of groundwater flow patterns around a dual-screened groundwater circulation well

    Journal of contaminant hydrology
    1. Richard L. Johnson
    2. Michelle A. Simon

  • Microbial characterization of groundwater undergoing treatment with a permeable reactive iron barrier

    Environmental Engineering Science
    1. Marcio L.B. Da Silva
    2. Richard L. Johnson
    3. Pedro J.J. Alvarez

  • Oxidation of chlorinated ethenes by heat-activated persulfate

    Environmental Science and Technology
    1. Rachel H. Waldemer
    2. Paul G. Tratnyek
    3. Richard L. Johnson
    4. James T. Nurmi