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Hydroxyl Radical Rate Constants: Comparing UV/H2O2 and Pulse Radiolysis for Environmental Pollutants
Citation:
ELOVITZ, M., H. Shemer, J. R. Peller, K. Vinodgopal, M. SIVAGANESAN, AND K. G. Linden. Hydroxyl Radical Rate Constants: Comparing UV/H2O2 and Pulse Radiolysis for Environmental Pollutants. doi:10.2166/aqua.200, J K Edzwald (ed.), JOURNAL OF WATER SUPPLY: RESEARCH AND TECHNOLOGY - AQUA. IWA Publishing, London, Uk, 57(6):391-401, (2008).
Impact/Purpose:
Journal
Description:
The objective of this study was to measure OH radical rates using both UV/H2O2 and pulse radiolysis techniques for 13 US EPA Contaminant Candidate List compounds (2,6- and 2,4-DNT, EPTC, prometon, linuron, diuron, dyfonate, diazinon, RDX, molinate, nitrobenzene, metolachlor, and terbacil). The rate constants determined using these techniques were compared to each other and to values reported in the literature. Difference factors between kOH obtained using UV/H2O2 and pulse radiolysis ranged from 1.1 to 2.3. It was shown that even small differences in OH rate constants values can result in fairly large differences (up to 50%) when trying to predict removals of pollutants in an advanced oxidation process.