Ferrate(VI) promotes inactivation of antibiotic-resistant bacteria and chlorine-resistant bacteria in water

文献类型： 外文期刊

第一作者： Zhang, Shuai

作者： Zhang, Shuai;Xu, Ting;Xue, Ningxuan;Zhang, Gongxu;Qiu, Pengxiang;Zhou, Huimin

作者机构：

关键词： Ferrate(VI); Disinfection; Antibiotic; resistant bacteria; Antibiotic resistance genes

期刊名称：JOURNAL OF HAZARDOUS MATERIALS （ 影响因子：11.3； 五年影响因子：12.4 ）

ISSN： 0304-3894

年卷期： 2025 年 492 卷

页码：

收录情况： SCI

摘要： The increasing problem of antibiotic resistance has garnered significant global attention. As a novel water treatment agent with strong oxidizing, disinfecting, and bactericidal properties, ferrate(VI) holds promise for inactivating antibiotic-resistant bacteria (ARB) and chlorine-resistant bacteria. The results showed that complete inactivation of ARB (10(5) CFU/mL) was achieved when the ferrate(VI) concentration was 10 mu M and the treatment duration was 5 min. For higher concentrations of ARB (10(8) CFU/mL), it was also possible to reduce the concentration by 1.73 log units. The concentration of Acinetobacter baylyi ADP1 was also reduced by 1.77 log units. Additionally, the absolute abundance of antibiotic resistance genes (ARGs), including aphA, blaTEM, and tetA, was significantly reduced. Ferrate(VI) was rapidly consumed in the early stages of treatment, undergoing a stepwise reduction process that generated high-valent Fe intermediates and reactive oxygen species (ROS), both of which contributed to bacterial inactivation. Throughout the reaction, center dot O-2(-) played a dominant role in bacterial inactivation, with H2O2 acting synergistically and center dot OH contributing at later stages, leading to ROS overload, severe cellular damage, and enhanced membrane disruption. This study confirmed that ferrate(VI) could effectively inactivate ARB and chlorine-tolerant bacteria, and reduce the abundances of ARGs.

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