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• W3209740301 endingPage "102359" @default.
• W3209740301 startingPage "102359" @default.
• W3209740301 abstract "Copper ferrite embedded in montmorillonite (CuFe 2 O 4 -montmorillonite, CF-Mt) was designed and employed as a composite catalyst for peroxymonosulfate (PMS) activation to degrade ofloxacin (OFL). CuFe 2 O 4 characterization confirmed that this compound successfully dispersed on the surface of the montmorillonite. CF-Mt loaded with 40% CuFe 2 O 4 (0.4CF-Mt) possessed favorable magnetic properties, excellent pore structure, and abundant catalytic sites, obtaining the highest OFL degradation efficiency (85.2%) in the presence of PMS compared to other CF-Mt composites with different CuFe 2 O 4 loads. Influencing parameters including catalyst dosage, PMS concentration, initial pH, and co-existing anions were also investigated. High catalyst dosage and PMS concentrations were found to favor OFL degradation. The optimum pH in the 0.4CF-Mt/PMS system for OFL removal was 6.8 (neutral pH). Additionally, Cl − promoted OFL degradation performance, whereas H 2 PO 4 − and HCO 3 − had the opposite effect. Radical quenching experiments and electron paramagnetic resonance demonstrated that the OFL degradation in the 0.4CF-Mt/PMS system was largely attributed to free radical pathways dominated by SO 4 ·- and ·OH. OFL mineralization increased with reaction time, finally reaching a mineralization rate of 54.8%. Furthermore, 0.4CF-Mt maintained excellent catalytic activity after repeated use. Taken together, this study provides a basis for the development of strategies to design bimetallic oxide catalysts for the efficient treatment of antibiotic-contaminated wastewater with PMS. • The copper ferrite supported on montmorillonite (CF-Mt) was successfully synthesized. • CF-Mt obtained favorable magnetic property, abundant pore structure and catalytic sites. • The efficient ofloxacin degradation was achieved by 0.4CF-Mt with PMS activation. • Ofloxacin removal was attributed to free radical pathway dominated by SO 4 ·- and ·OH." @default.
• W3209740301 created "2021-11-08" @default.
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• W3209740301 date "2021-12-01" @default.
• W3209740301 modified "2023-10-02" @default.
• W3209740301 title "CuFe2O4 supported on montmorillonite to activate peroxymonosulfate for efficient ofloxacin degradation" @default.
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• W3209740301 doi "https://doi.org/10.1016/j.jwpe.2021.102359" @default.
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