数字农科院2.0

Enhancing tetracycline removal: Performance and mechanisms of interspecies electron transfer in microbial consortia

文献类型： 外文期刊

作者： Zhennan Wang;Huike Ye;Xiaojing Li;Yang Sun;Lixia Zhao;Yali Chen;Pin Pin Yang;Liping Weng;Mohan Bai

作者机构：

关键词： Biodegradation;Catalase;Microbial electrochemical system;Molecular docking;Tetracycline

期刊名称： Journal of Hazardous Materials

ISSN： 0304-3894

年卷期： 2025 年 492 卷

页码：

收录情况： SCIE（2025版） ; ; EI（2025版）

摘要： With the widespread application of antibiotics in aquaculture, antibiotic contamination of manure has become a serious concern. Interspecies electron transfer between microorganisms plays a crucial role in antibiotic biodegradation. This study investigated the impact and mechanism of electron transfer on tetracycline degradation in microbial electrochemical systems. The results demonstrated that at an initial tetracycline concentration of 5 mg/L, the closed-circuit (CC) group achieved a removal rate exceeding 91.98 % within 4 d, which was 2.71 times higher than that of the open-circuit (OC) group. The electron transfer capacity of the CC group was also significantly greater than that of the OC group. Microbial community analysis identified Serratia, Petrimonas, Pseudochrobactrum, and Sphingobacterium as the key potential tetracycline-degrading genera. Additionally, catalase activity in the CC group was significantly enhanced, reaching up to four times that observed in the OC group. Molecular docking further confirmed the strong affinity between catalase and tetracycline, suggesting that catalase plays a significant role in tetracycline degradation. This study offers both theoretical insights and technical support for enhancing the microbial treatment efficiency of organic pollutants.

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