Magnetic Co/Fe bimetallic confined nitrogen dopped porous carbon to activate peroxymonosulfate for efficient degradation of mycotoxins: Radical and non-radical pathways

文献类型： 外文期刊

第一作者： Wang, Yudan

作者： Wang, Yudan;Li, Yu;Zhai, Wenlei;Fang, Lin;Wang, Meng

作者机构：

关键词： Co/Fe@N-PC; Mycotoxins; Peroxymonosulfate; DFT calculations; Toxicity evaluation

期刊名称：JOURNAL OF WATER PROCESS ENGINEERING （ 影响因子：6.7； 五年影响因子：6.7 ）

ISSN： 2214-7144

年卷期： 2025 年 69 卷

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收录情况： SCI

摘要： Mycotoxins are hazardous contaminants in food and the environment, posing significant threats to human health. In this study, magnetic Co/Fe bimetallic-confined nitrogen-doped porous carbon (Co/Fe@N-PC) was synthesized and employed as a catalyst for the degradation of multiple mycotoxins, including zearalenone (ZEN), ochratoxin A (OTA), aflatoxin B-1 (AFB(1)), and deoxynivalenol (DON). The results showed that 98.9 % of the four mycotoxins were simultaneously removed using 3 mg of Co/Fe@N-PC, with a degradation efficiency order of ZEN > OTA > AFB(1) > DON. Co/Fe@N-PC nanoparticles exhibited high activity and stability in peroxymonosulfate (PMS) activation, and the degradation of the four mycotoxins involved both radical and non-radical degradation pathways. For the recalcitrant DON structure, 2 mg of catalyst and 1 mM of PMS were required for its individual degradation, and the radical pathway played a major role in the degradation process. The main active species were identified as Fe2+/Fe3+ and Co-0/Co2+/Co3+, whereas pyridinic N, pyrrolic N, and graphitic N enhanced the catalytic process. Synergistic catalysis between Co and Fe in Co/Fe@N-PC further improved mycotoxin degradation. Degradation products and pathways were proposed using high-resolution mass spectrometry and density functional theory calculations, revealing reduced toxicity for most degradation products. These findings indicate that Co/Fe@N-PC is a highly efficient catalyst for the removal of multiple mycotoxins.

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