Professor Education: B.S., University of North Carolina, (1971); Ph.D., Massachusetts Institute of Technology (1977) Email: john.westall@oregonstate.edu Office: 153 Gilbert Hall Phone: (541) 737-2591 Fax: (541) 737-2062 Research group web site: http://www.chemistry.oregonstate.edu/personalhomepages/westall.htm

Dr. Westall's research is focused on the application of surface and solution chemistry to problems in environmental chemistry, electrochemistry, and analytical chemistry. Current research topics include: (i) interactions of metal ions with heterogeneous environmental complexants, such as humic substances and surfaces of soil particles, and development of models for these complex interactions; (ii) electrochemical processes in the environment, including corrosion and redox transformations of inorganic and organic pollutants; (iii) the processes that control the distribution of hydrophobic, ionogenic, and ionic organic compounds between water and environmental sorbents; (iv) electric double layer phenomena associated with environmental surfaces; (v) mathematical methods for the determination of equilibrium constants from experimental data; (vi) the application of multicomponent chemical equilibrium models to biogeochemical problems.

Representative Publications

• Role of Surface Alteration in Determining the Mobility of U(VI) in the Presence of Citrate: Implications for Extraction of U(VI) from Soils, Environ. Sci. Technol., 2004, 38, 3752-3759.
• Kinetics of Reduction of Nitrobenzene and Carbon Tetrachloride at an Iron-Oxide Coated Gold Electrode, Environ. Sci. Technol., 2003, 37, 2356-2362.
• Mass Transport Effects on the Kinetics of Nitrobenzene Reduction by Iron Metal, Environ. Sci. Technol., 2001, 35, 2804-2811.
• Evaluation of Liposome-Water Partitioning of Organic Acids and Bases: 1. Development of a Sorption Model,
  2. Comparison of Experimental Determination Methods, Environ. Sci. Technol., 2000, 34, 3954-3968.
• Sorption of Linear Alkylbenzenesulfonates on Sediment Materials, Environ. Sci. Technol., 1999, 33, 3110-3118.
• Sequestration of Hydrophobic Organic Contaminants by Geosorbents - Critical Review, Environ. Sci. Technol., 1997, 31, 3341
• Models for Association of Metal Ions with Heterogeneous Environmental Sorbents: I. Complexation of Co(II) by Leonardite Humic Acid as a Function of pH and NaClO₄ Concentration, Environ. Sci. Technol., 1995, 29, 951.
• Use of Cationic Surfactants to Modify Soil Surfaces To Promote Sorption and Retard Migration of Hydrophobic Organic Compounds, Environ. Sci. Technol., 1994, 28, 231.
• The Study of Soil Chemistry Through Quasi-Steady-State Models: II. Acidity of Soil Solution, Geochim. Cosmochim. Acta, 1990, 54, 2363.