Bob Arnold
Bob Arnold
(520) 621-2410
Professor Emeritus

Research Area
•    Abiotic and biochemical catalysis of reductive dehalogenation.  
•    Oxidation of hazardous organic compounds in soils using H2O2 and Fenton-derived hydroxyl radicals.  
•    Engineered systems leading to water reuse following infiltration and aquifer storage – the effect of soil-aquifer treatment on organic residuals, available nitrogen forms and pathogens in treated municipal wastewaters.  
•    Trace organic chemicals in products derived from wastewater treatment – reclaimed water and biosolids.
•    Engineering methods for minimum-cost salt removal from public water sources.

Curriculum Vitae

Educational Qualifications
•    BSME, US Naval Academy, 1969
•    M.S., Environmental Engineering, University of North Carolina at Chapel Hill, 1976
•    Ph.D., Environmental Engineering, California Institute of Technology, 1986

Research is concentrated in areas pertinent to the purification of water and wastewater for human consumption and reuse.  There is a strong emphasis on wastewater reclamation and reuse, taking advantage of combinations of engineered and natural processes such as advanced oxidation and soil-aquifer treatment to provide water purity and defense in depth against human and environmental exposure to residual contaminants.  Systems analytical approaches are used to provide assurance of water security (reliability in meeting projected water demands) at lowest cost and with acceptable risk in chronically water short areas like the southwestern United States through combinations of engineered measures and water use management.  This function must be carried out in the presence of increasing uncertainty related to climate variation and population growth projections.

•    Presidential Young Investigator—class of 1987
•    Elected AEESP Board Member and AEESP Foundation Board Member—2010-2014

Selected Publications
Arnold, R., Saez, A., Snyder, S., Maeng, S., Lee, C., Woods, G., Li, X., Choi, H. (2012). Direct potable reuse of reclaimed wastewater— it is time for a rational discussion. Rev Environ Health. 27(4), 197–206.

Woods, G.J., Kang, D., Quintanar, D.R., Curley, E.F., Davis, S.E., Lansey, K.E., Arnold, R.G. Centralized vs. decentralized wastewater reclamation in the Houghton Area of Tucson, AZ, Journal of Water Resources Planning and Management. Published online April 3, 2012.

Du, F., Woods, G.J., Kang, D., Lansey, K.E., and Arnold, R.G. Life Cycle Analysis for Water and Wastewater Pipe Materials. Journal of Environmental Engineering. Published online August 2012.

Arnold, R.G., J. Hayworth, A.E. Sáez, C. Rodriguez, P. Weinstein, B. Ling, S. Memon, The Status of Water and Sanitation among Pacific Rim Nations, Reviews on Environmental Health, 26, 17-30 (2011).

Rojas, M.R., C. Leung, D. Whitley, Y. Zhu, R.G. Arnold and A.E. Sáez, Advanced Oxidation of Trace Organics in Water by Hydrogen Peroxide Solar Photolysis, Industrial & Engineering Chemistry Research, 50, 12479-12487 (2011).

Rojas, M.R., F. Pérez, D. Whitley, R.G. Arnold and A.E. Sáez, Modeling of Advanced Oxidation of Trace Organic Contaminants by Hydrogen Peroxide Photolysis and Fenton’s Reaction, Industrial & Engineering Chemistry Research, 49, 11331–11343, (2010).


University of Arizona College of Engineering