Degradation of tetrabromobisphenol A through peroxymonaosulfate oxidation activated by LaSrCoMnO perovskite.

LaSrCoMnO (LSCM) perovskite composite oxides prepared by co-doping of Co and Mn in B site-activated peroxymonosulfate (PMS) to degrade tetrabromobisphenol A. The characterization results indicated that the LSCM with x=0.3-0.8 have hexagonal R-3c structure. The activation effect of LSCM on PMS decreased gradually with the increase of Mn doping, among which LSCM82 (x=0.8) had good oxygen desorption performance certificated by O-TPD and lower relative acidity (1.975). Moreover, the redox pairs of Co/Mn multi-valence ions were the main contributor to its catalytic activity. The electron spin resonance results suggested that SO and •OH existed in the system and SO is the main free radical. Therefore, LSCM82 perovskite catalyst has broad application prospects in aqueous solutions.