MnFe2O4/zeolite composite catalyst for activating peroxymonosulfate to efficiently degrade antibiotic

摘要

To design a catalyst with high catalytic activity and reusability for activating peroxymonosulfate (PMS) to degrade antibiotic, magnetic MnFe2O4/zeolite (MFZ) catalyst was prepared by one-pot co-precipitation hydro -thermal method. Comprehensive characterizations indicate MnFe2O4 nanoparticles were supported on the sur-face of Na-A zeolite. The saturation magnetization of MFZ is 12.85 emu/g, which is sufficient for magnetic solid-liquid separation. The removal of tetracycline in MFZ/PMS oxidation system could reach 96.4, which was more than 2.7 times of that using PMS alone. And after 5 cycles, the degradation could still reach 80.4. Mechanism analysis suggests that 1O2 and O2 center dot-played predominant roles in the advanced oxidation process.