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Environmental Science Faculty

Flynn Picardal
Associate Professor

Ph.D., Civil Engineering, University of Arizona, 1992

Bioremediation technologies may offer the potential for cleanup of contaminated soils and groundwater that may not be treatable in an efficient or cost-effective manner by other methods. Development of bioremediation strategies, however, requires a comprehensive understanding of not only how microorganisms transform pollutants, but also of microbial ecology and biogeochemical interactions. Dr. Picardal's research specifically deals with the (a) biotransformation of metals and microbial interactions with mineral surfaces, (b) microbial iron reduction, and (c) biodegradation of PCBs and other chlorinated organic compounds. Professor Picardal teaches graduate and undergraduate courses in environmental microbiology, bioremediation, environmental soil science, environmental chemistry laboratory, environmental engineering, and water/wastewater treatment.

Awards

Recent Publications

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Adebusoye, Sunday A., Picardal, F.W., Ilori, M.O., Amund, O.O., Fuqua, C. and N. Grindle (2007). Aerobic degradation of di- and trichlorobenzenes by two bacteria isolated from polluted tropical soils. Chemosphere 66(1):1939-1946.

Adebusoye, Sunday A., Picardal, F.W., Ilori, M.O., Amund, O.O., Fuqua, C. and N. Grindle (2007). Growth on ortho-substituted dichlorobiphenyls with chlorine substitution on each ring by tropical bacteria. Applied Microbiology and Biotechnology 74:484-492.

Cooper, D. Craig, Coby, A.J., and F. W. Picardal (2006). Interactions between Microbial Iron Reduction and Metal Geochemistry: Effect of Redox Cycling on Transition Metal Speciation in Iron Bearing Sediments. Environmental Science and Technology 40(6):1884-1891.

Coby, A.J. and F.W. Picardal. (2006). Influence of sediment components on the immobilization of Zn during microbial Fe-(hydr)oxide reduction. Environmental Science and Technology 40(12):3813-1818.

Coby, Aaron J. and Flynn W. Picardal (2005). Inhibition of NO3- and NO2- Reduction by Microbial Fe(III) Reduction: Evidence of a Reaction Between NO2- and Cell Surface-Bound Fe2+. Applied and Environmental Microbiology 71(9):5267-5274.

Cooper, D.C., Neal, A.L., Kukkadapu, R.K., Brewe, D., Coby A., and F.W. Picardal (2005). Effects of sediment iron mineral composition on microbially mediated changes in divalent
metal speciation: Importance of ferrihydrite. Geochimica et Cosmochima Acta 69(7):1739-1754.

Picardal, F. and D.C. Cooper (2005). Microbially Mediated Changes in the Mobility of Contaminant Metals in Soils and Sediments. In : I. Ahmad, S. Hayat, and J. Pitchel (Eds.), Heavy Metal Contamination of Soil: Problems and Remedies. Science Publishers, USA.

Cooper, D.C., Picardal, F.W., Schimmelmann, A., and A. J. Coby (2003). Chemical and Biological Interactions During Nitrate and Goethite Reduction by Shewanella putrefaciens 200. Applied and Environmental Microbiology 69(6):3517-3525.

Weber, K.A., Picardal, F.W., and E.E. Roden (2001). Microbially-Catalyzed Nitrate -Dependent Oxidation of Biogenic Solid-Phase Fe(II) Compounds. Environmental Science and Technology 35:1644-1650.

Kim, S. and Picardal, F. (2001). Microbial Growth on Dichlorobiphenyls Chlorinated on Both Rings as a Sole Carbon and Energy Source. Applied and Environmental Microbiology 67(4):1953-1955.

Kim, S. and Picardal, F. (2000). A Novel Bacterium that Utilizes Monochlorobiphenyls and 4-Chlorobenzoate as Growth Substrates. FEMS Microbiology Letters 185:225-229.

Cooper, D.C., Picardal, F.W., Rivera, J, and Talbot, C. (2000). Zinc Immobilization and Magnetite Formation Via Ferric Oxide Reduction by Shewanella putrefaciens 200. Environmental Science and Technology 34:100-106.

Collins, R., and Picardal, F. (1999). Enhanced Anaerobic Biotransformation of Carbon Tetrachloride by Soil Organic Matter. Environmental Toxicology and Chemistry 18(12):2703-2710.

Kim, S., and Picardal, F. (1999). Enhanced Anaerobic Biotransformation of Carbon Tetrachloride in the Presence of Reduced Iron Oxides. Environmental Toxicology and Chemistry 18(10):2142-2150.

Backhus, D., Picardal, F., Johnson, S., Knowles, T., Collins, R., Radue, A., and S. Kim. (1997). Soil- and Surfactant-Enhanced Reductive Dechlorination of Carbon Tetrachloride in the Presence of Shewanella putrefaciens 200. Journal of Contaminant Hydrology 28:337-361.

Picardal, F, S. Kim, A. Radue, and D. Backhus (1997). Anaerobic Transformations of Carbon Tetrachloride: Combined Bacterial and Abiotic Processes. In Tedder and Pohland (Eds.), Emerging Technologies in Hazardous Waste Management VII (American Chemical Society Special Symposium Book). Plenum Press, New York.

Picardal, F.W., Bryan Huey, and R.G. Arnold (1995). Effects of Electron Donor and Acceptor Condition on the Reductive Dehalogenation of Tetrachloromethane by Shewanella putrefaciens 200. Applied and Environmental Microbiology 61:8-12.

Enzien, M.V., F.W. Picardal, T.C. Hazen, R.G. Arnold, and C.F. Fliermans (1994). Reductive Dechlorination of Trichloroethylene and Tetrachloroethylene under Aerobic Conditions in a Sediment Column. Applied and Environmental Microbiology 60(6):2200-2204.

Picardal, F.W., R.G. Arnold, H. Couch, A.M. Little, and M.E. Smith (1993). Involvement of Cytochromes in the Anaerobic Biotransformation of Tetrachloromethane by Shewanella putrefaciens 200. Applied and Environmental Microbiology 59(11):3763-3770.

Kupillas, G.E., K.G. Pill, F.W. Picardal, and R.G. Arnold (1991). A Multiparameter Chemical Toxicity Test Using Salmonella typhimurium and Spirochaeta aurantia. Environmental Toxicology and Water Quality 6:293-308.

Pill, K.G., G.E. Kupillas, F.W. Picardal, and R.G. Arnold (1991). Estimating the Toxicity of Chlorinated Organic Compounds Using a Multiparameter Bacterial Assay. Environmental Toxicology and Water Quality 6:271-291.

Arnold, R.G., M.R. Hoffman, T.J. DiChristina, and F.W. Picardal (1990). Regulation of Dissimilatory Fe(III) Reduction Activity in Shewanella putrefaciens. Applied and Environmental Microbiology 56:2811-2817.