Abstract: We carried out experimental studies of tetrabromobisphenol A (TBBPA) degradation by perovskite La0.5Sr0.5Co0.8Mn0.2O3-δ(LSCM82) and peroxy-monosulfate. We investigated in detail the effect of catalytic activity of perovskite prepared at different calcination temperatures on TBBPA degradation, and the effect of initial pH on the degradation efficiency of preferred catalytic system. The results show that the redox pairs of variable-valence metal ions Co3+/Co2+ and (Mn4++Mn3+)/Mn2+ were the major contributors to catalyst activation. At 950 ℃ calcination temperature, the catalytic reaction rate was higher for the catalyst aggregate LSCM82-950 that has proper oxygen vacancies and specific surface area. We found that degradation of TBBPA in water by LSCM82-950 activated monosulfate at neutral pH not only reduced cobalt leaching from catalyst, but also achieved maximum degradation.

Key words: perovskite, peroxy-monosulfate, TBBPA, degradation, advanced oxidation processes