Effect of catalytic ozonation with supported cerium oxide on THMs formation potential of filtered surface water

Abstract:

This work investigated the trihalomathenes formation potential(THMsFP) of filtered surface water after catalytic ozonation in the presence of cerium oxide supported on alumina(CeO2/Al2O3/O3) in a continuous flow reactor.CeO2/Al2O3/O3oxidation caused a reduction of THMsFP of the filtered water by 57.0% compared with ozonation alone.It is related to the higher TOC removal and more halogen reactive sites destruction during catalytic ozonation with supported CeO2.The bromide concentration,contact time and ozone concentration were further studied during CeO2 /Al2O3 /O3oxidation.The catalytic ozonation showed a significant advantage over ozonation in controlling THMsFP of the water at conditions applied in this experiment.In fact,low ozone dosage of 0.7 mg·L-1 in the catalytic ozonation can bring about a reduction of THMsFP of the filtered water by 64.9% compared with ozonation alone.