Kinetics of one-electron oxidation by the ClO radical |
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| Affiliation: | 1. Laboratory of Environmental Process Engineering, Faculty of Process Engineering, University Salah Boubnider − Constantine 3, P.O. Box 72, 25000 Constantine, Algeria;2. Laboratory of Environmental Engineering, Department of Process Engineering, Faculty of Engineering, Badji Mokhtar – Annaba University, P.O. Box 12, 23000 Annaba, Algeria;3. The University of Melbourne, Department of Chemistry, Parkville, Victoria 3010, Australia;1. College of Civil Engineering and Architecture, Guangxi University, Nanning, 530004, China;2. School of Resources, Environment and Materials, Guangxi University, Nanning, 530004, China;3. Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology, Guangxi University, Nanning, 530004, China;1. School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou, China;2. Department of Civil and Environmental Engineering, The Hong Kong University of Science and Technology, Kowloon, Hong Kong;3. Hong Kong Branch of China National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, Hong Kong;1. State Key Laboratory of Pollution Control and Resource Reuse, Key Laboratory of Yangtze Water Environment, Ministry of Education, College of Environmental Science and Engineering, Tongji University, Shanghai, 200092, PR China;2. Shanghai Institute of Pollution Control and Ecological Security, Shanghai, 200092, PR China;3. Department of Safety, Health and Environmental Engineering, National Kaohsiung University of Science and Technology, Kaohsiung, 824, Taiwan, ROC;4. College of Environmental and Chemical Engineering, Shanghai University of Electric Power, Shanghai, 200090, PR China;5. School of Chemical Science and Engineering, Key Laboratory of Road and Traffic Engineering of Ministry of Education, Tongji University, Shanghai, 200092, PR China;1. Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China;2. State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China;3. University of Chinese Academy of Sciences, Beijing 100049, China;4. College of Chemistry, Chemical Engineering and Environmental Engineering, Liaoning Shihua University, Liaoning 113001, China;1. School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai, 200093, China;2. School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Shanghai, 201418, China;3. State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai, 200092, China |
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| Abstract: | Pulse radiolysis studies were carried out to determine the rate constants for reactions of ClO radicals in aqueous solution. These radicals were produced by the reaction of OH with hypochlorite ions in N2O saturated solutions. The rate constants for their reactions with several compounds were determined by following the build up of the product radical absorption and in several cases by competition kinetics. ClO was found to be a powerful oxidant which reacts very rapidly with phenoxide ions to form phenoxyl radicals and with dimethoxybenzenes to form the cation radicals (k = 7 × 108 −2 × 109 M-1 s-1). ClO also oxidizes ClO-2 and N-3 ions rapidly (9.4 × 108 and 2.5 × 108 M-1 s-1, respectively), but its reactions with formate and benzoate ions were too slow to measure. ClO does not oxidize carbonate but the CO-3 radical reacts with ClO- slowly (k = 5.1 × 105 M-1 s-1). |
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