CexZr1 − xO2 mixed oxides applied to minimize the bromate formation in the catalytic ozonation of a filtered water

Abstract Several Ce x Zr 1 −  x O 2 mixed oxides were prepared and used as catalysts to investigate the minimization of BrO 3 − formation in the ozonation of a filtered water containing Br − in a batch reactor. The Ce x Zr 1 −  x O 2 mixed oxides showed good performance in reducing BrO 3 − formation and removing organic compounds. The Ce 0.75 Zr 0.25 O 2 oxide exhibited the highest efficiency, and 53% BrO 3 − was reduced after 20 min reaction. The mixed oxides accelerated the decomposition of the dissolved O 3 into OH radicals, and the competitive reaction between organic compounds and Br − with OH radicals was found to occur in the ozonation reaction.