Activation of Peroxymonosulfate by Carbon Nanofiber Supported Fe/Co Bimetallic MOFs for Efficient Degradation of Ceftiofur Sodium

With the rapid development of the pharmaceutical industry and animal husbandry, conventional wastewater treatment plants have difficulty effectively degrading the widely occurring ceftiofur sodium (CEF) in aquatic environments. To address this issue, this study successfully loaded Fe/Co-ZIF onto carbon nanofibers (CNF), thereby preparing Fe/Co-ZIF@CNF composites with well-dispersed supported materials and a stable structure. The as-prepared Fe/Co-ZIF@CNF was further applied in a persulfate-based advanced oxidation system (SR-AOPs) for CEF degradation and exhibited good catalytic performance. When the Fe/Co molar ratio was 1.25:1, the Fe/Co-ZIF1.25 material achieved a CEF degradation efficiency, kobs value, and TOC removal rate of 94.0%, 0.135 min−1, and 43.8%, respectively. Radical quenching experiments preliminarily indicated that SO4•− played a dominant role in the reaction system, while •OH and 1O2 also made non-negligible contributions to CEF degradation. This work provides a new strategy for constructing composite catalysts based on carbon nanofiber-supported polymetallic MOFs.