Abstract
Several CexZr1 − xO2 mixed oxides were prepared and used as catalysts to investigate the minimization of BrO3− formation in the ozonation of a filtered water containing Br− in a batch reactor. The CexZr1 − xO2 mixed oxides showed good performance in reducing BrO3− formation and removing organic compounds. The Ce0.75Zr0.25O2 oxide exhibited the highest efficiency, and 53% BrO3− was reduced after 20 min reaction. The mixed oxides accelerated the decomposition of the dissolved O3 into OH radicals, and the competitive reaction between organic compounds and Br− with OH radicals was found to occur in the ozonation reaction.
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