Synthesis of Fe-Loaded Biochar Obtained from Rape Straw for Enhanced Degradation of Emerging Contaminant Antibiotic Metronidazole

文献类型： 外文期刊

第一作者： Zhang, Dongyuan

作者： Zhang, Dongyuan;Shi, Lin;Dawolo, Edwin Hena;Liu, Hong;Chen, Bingfa;Ding, Ning

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关键词： biochar; PMS; antibiotic; metronidazole; degradation

期刊名称：WATER （ 影响因子：3.0； 五年影响因子：3.3 ）

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年卷期： 2024 年 16 卷 13 期

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收录情况： SCI

摘要： In this study, magnetic (Fe)-loaded biochar was successfully prepared by a simple impregnation pyrolysis method. Meanwhile, its degradation capability and mechanism for typical antibiotic metronidazole (MNZ) were systematically investigated under different conditions. The characterization of the synthesized material showed that the specific surface area, pore diameter, and pore volume changed significantly. Also, functional groups and metal element Fe were introduced on the surface of the biochar, leading to its better capability to activate peroxymonosulfate (PMS). The degradation experiments showed that the removal of MNZ in the Fe-BC/PMS system can reach up to 95.3% in 60 min under optimal conditions. Free-radical capture experiments showed that there were several active species of center dot OH, SO4 center dot-, center dot O2-, and 1O2 present in the catalyst to synergistically degrade MNZ, among which SO4 center dot- played a major role; it was also found that the material can be easily recycled and was still effective after several uses. Further, the main degradation pathways of MNZ include nitrohydroxylation, hydroxyethyl functional group deletion, carboxylation of the amino functional group of center dot OH, demethylation, oxidation, and carboxylation. It is obvious that the synthesized magnetic-loaded biochar, Fe-BC, generated from waste rape straw crops, shows high catalytic performance in pollutant degradation, providing an insight into the recycling potential of waste biomass in the catalytic field for pollutant removal.

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