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Water Science & Technology: Water Supply Vol 12 No 2 pp 187–192 © IWA Publishing 2012 doi:10.2166/ws.2012.018 Effects of ion-exchange treatment on bromate formation and oxidation efficiency during ozonationS. Echigo, S. Itoh and A. NiwaGraduate School of Global Environmental Studies, Kyoto University, C1, Nishikyo, Kyoto 65-8540, Japan E-mail: echigo@urban.env.kyoto-u.ac.jpShimazu Corp., Nishinokyo-Kuwabara-cho, Nakagyo-ku, Kyoto 604-8511, Japan ABSTRACT Ion-exchange treatment is a promising technique for removing hydrophilic compounds during drinking water treatment. In this study, we applied several different ion exchangers (i.e., anion exchange resins and a hydrotalcite compound) to bromide removal to minimize bromate formation during ozonation. It was found that ion-exchange treatment affected ozone and hydroxyl radical concentration profiles as well as bromate ion concentration after ozonation. Selecting an appropriate ion exchanger is important to achieve both the oxidation of target contaminants and the reduction of bromate ion during ozonation. Keywords: bromate ion; bromide; disinfection byproducts; ion exchange; ozonation eProduct: Buy this article for £24.00 (IWA MEMBER PRICE: £18.00) All prices include VAT. For customers where VAT should not be applied, the VAT amount will be removed upon payment |
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