CoFe2O4@MoS2活化PMS降解环丙沙星的产物及毒性分析

王杰; 马梦杰; 谢鹏飞; 章慧娟

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中国环境科学 ›› 2025, Vol. 45 ›› Issue (5) : 2865-2874.

新污染物

CoFe₂O₄@MoS₂活化PMS降解环丙沙星的产物及毒性分析

王杰, 马梦杰, 谢鹏飞, 章慧娟

作者信息 +

Degradation products and toxicity analysis of ciprofloxacin by activation of peroxymonosulfate using CoFe₂O₄@MoS₂

WANG Jie, MA Meng-jie, XIE Peng-fei, ZHANG Hui-juan

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摘要

利用实验室制备的CoFe₂O₄@MoS₂活化过一硫酸氢盐(PMS)降解水中的环丙沙星(CIP),SEM及XRD的表征结果证明了CoFe₂O₄@MoS₂的成功制备.降解结果表明,CoFe₂O₄@MoS₂/PMS体系中CIP的去除率在120min达到74.38%,高于单独的CoFe₂O₄@MoS₂以及PMS体系之和,证实了CoFe₂O₄@MoS₂对PMS的活化能力.淬灭实验结果表明CoFe₂O₄@MoS₂/PMS体系中的主要的氧化活性物种为^·OH、SO4^·-以及¹O₂,且SO₄^·-和¹O₂对CIP的降解起主要作用.通过密度泛函理论并结合HPLC分析,得到8种可能的中间产物并提出了CIP可能的两种降解路径.T.E.S.T程序对降解产物的环境风险的评价预测结果显示,和母体相比,大部分产物的急性毒性降低、致突变性减弱、生物累积性和发育毒性降低,生态毒性明显降低.此外,4次循环后CoFe₂O₄@MoS₂/PMS体系对CIP的去除率仍能达到60.04%,且XRD结果显示反应前后催化剂的晶体结构变化不明显,说明了催化剂的高效稳定性.

Abstract

CoFe₂O₄@MoS₂ was prepared by the hydrothermal method and used to activate permonosulfate (PMS) for the degradation of ciprofloxacin (CIP) in water. The successful preparation of CoFe₂O₄@MoS₂ was confirmed by the characterization results obtained from SEM and XRD. Degradation results showed that the removal rate of CIP in the CoFe₂O₄@MoS₂/PMS system can reached 74.38% in 120minutes, which is higher than the sum of the individual CoFe₂O₄@MoS₂ and PMS systems, verifying the activation ability of CoFe₂O₄@MoS₂ on PMS. The quenching experiment results indicated that the main oxidative active species in the system are ^·OH、SO₄^·- and ¹O₂, with SO₄^·- and ¹O₂ playing a major role in the degradation of CIP. Based on density functional theory combined with HPLC analysis, eight possible products were obtained and two possible degradation pathways of CIP were proposed. The environmental risks of the degradation products were evaluated and predicted using the TEST program, and it was shown that, compared with the parent compound, most products exhibited reduced acute toxicity, weakened mutagenicity, decreased bioaccumulation and developmental toxicity, and significantly lower ecotoxicity. Additionally, the CIP removal rate of the CoFe₂O₄@MoS₂/PMS system can still reached 60.04% after four cycles, and the XRD results demonstrated that the crystal structure of the catalyst did not undergo significant changes before and after the reaction, indicating the high efficiency and stability of the catalyst.

导出引用

王杰, 马梦杰, 谢鹏飞, 章慧娟. CoFe₂O₄@MoS₂活化PMS降解环丙沙星的产物及毒性分析[J]. 中国环境科学. 2025, 45(5): 2865-2874

WANG Jie, MA Meng-jie, XIE Peng-fei, ZHANG Hui-juan. Degradation products and toxicity analysis of ciprofloxacin by activation of peroxymonosulfate using CoFe₂O₄@MoS₂[J]. China Environmental Science. 2025, 45(5): 2865-2874

中图分类号： X703

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