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In this study, A- and B-site doped perovskite La 0.5 Sr 0.5 Co 0.8 Ni 0.2 O 3 （LSCN) was prepared by sol-gel method. On this basis, ZrO 2 supported LSCN used to maintain high catalytic activity while inhibit the leaching of toxic Co ions. Compared with the non-doped LaCoO 3 , the ZrO 2 @La 0.5 Sr 0.5 Co 0.8 Ni 0.2 O 3 (Z@LSCN82)/PMS system could almost completely degrade SMX in 30 min. In addition, the leaching amount of Co ions was only 0.303 mg L -1 . Free radical quenching experiments and electron paramagnetic resonance experiments proved that active species SO 4 •- , •OH and 1 O 2 existed in the Z@LSCN82/PMS system, and SO 4 •- played a major role. Besides, the catalyst had high efficiency for SMX degradation in a wide pH range. In addition, co-existing anions in water such as HPO 4 - and Cl - also showed slight inhibition of the system. It was indicated that the Z@LSCN82/PMS system had huge potential applications for practical wastewater treatment., (Copyright © 2022 Elsevier Ltd. All rights reserved.)