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Unveiling the reaction pathways in the degradation mechanism of enrofloxacin by hydroxyl radicals: A DFT and experiment study

文献类型： 外文期刊

作者： Wenjing Liu;Aofan Wang;Xinruo Wang;Zhonghua Shen;Jishi Wang;Jie Ma;Yujie Zhao;Zeying He

作者机构：

关键词： Degradation mechanism;DFT study;Ecotoxicity;Enrofloxacin;Fluoroquinolone antibiotics;Hydroxyl radical (•OH)

期刊名称： Journal of Hazardous Materials

ISSN： 0304-3894

年卷期： 2025 年 491 卷

页码：

收录情况： SCIE（2025版） ; ; EI（2025版）

摘要： Fluoroquinolone antibiotics, widely used in daily life, contribute to environmental pollution due to their persistence in natural ecosystems. However, the degradation mechanism of fluoroquinolones remains elusive, which not only hinders the understanding of their environmental behavior but also restricts the development of effective remediations. This study investigates the degradation mechanism of enrofloxacin (ENR) through hydroxyl radicals (•OH), integrating density functional theory (DFT) calculations and experimental validations. The degradation process involves key steps such as bond activation (C–F, C–H, C–C) and decarboxylation, with the C–F bond and decarboxylation identified as rate-limiting steps. Experimental results confirm the theoretical predictions of degradation pathways and major by-products. Toxicity analysis shows that most degradation products exhibit significantly reduced toxicity compared to ENR. This work provides valuable insights into the degradation behavior of fluoroquinolones and lays the groundwork for designing advanced environmental remediation strategies.

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