Inhibition of Nano-Metal Oxides on Bromate Formation during Ozonation Process |
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| Authors: | Yue Wu Yifei Wang Caixia Hu |
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| Affiliation: | 1. The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, Guangzhou 510006, China;2. College of Environment and Energy, South China University of Technology, Guangzhou 510006, China |
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| Abstract: | Simulation studies in pure water were conducted to investigate the effect of nano-metal oxides on bromate (BrO3?) formation as catalysts and the catalytic mechanism. Results indicated that compared to ozonation alone, both nano-SnO2 and nano-TiO2 could inhibit the formation of bromate during ozonation process. The inhibition efficiency of BrO3? formation by nano-TiO2 enhanced with the increasing of ozone dosage and the decreasing of nano-TiO2 dosage, Br? concentrations and the pH value. Possible BrO3? minimization mechanism was that nano-TiO2 accelerated the decomposition of the dissolved O3 into OH radicals, which rapidly generated H2O2, and reduced HOBr/OBr? to Br?. |
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| Keywords: | Ozone Bromate Control Drinking Water Influencing Factors Nano-TiO2 |
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