提高四环素去除率：微生物联合体种间电子转移的性能和机制

IF 11.3 1区环境科学与生态学 Q1 ENGINEERING, ENVIRONMENTAL

Journal of Hazardous Materials Pub Date : 2025-04-15 DOI:10.1016/j.jhazmat.2025.138302

Zhennan Wang, Huike Ye, Xiaojing Li, Yang Sun, Lixia Zhao, Yali Chen, PinPin Yang, Liping Weng, Mohan Bai

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引用次数: 0

摘要

随着抗生素在水产养殖中的广泛应用，粪便的抗生素污染已成为一个严重的问题。微生物之间的种间电子传递在抗生素的生物降解过程中起着至关重要的作用。研究了微生物电化学系统中电子传递对四环素降解的影响及其机理。结果表明，在初始四环素浓度为5 mg/L时，闭路（CC）组在4 d内的去除率超过91.98%，是开路（OC）组的2.71倍。CC组的电子传递能力也显著大于OC组。微生物群落分析发现，沙雷氏菌、油单胞菌、假chrobacum和鞘菌是主要的潜在四环素降解属。此外，CC组的过氧化氢酶活性显著增强，达到OC组的四倍。分子对接进一步证实了过氧化氢酶与四环素之间的强亲和力，提示过氧化氢酶在四环素降解中发挥重要作用。本研究为提高微生物处理有机污染物的效率提供了理论见解和技术支持。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Enhancing Tetracycline Removal: Performance and Mechanisms of Interspecies Electron Transfer in Microbial Consortia

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Enhancing Tetracycline Removal: Performance and Mechanisms of Interspecies Electron Transfer in Microbial Consortia

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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来源期刊

Journal of Hazardous Materials 工程技术-工程：环境

CiteScore

25.40

自引率

5.90%

发文量

3059

审稿时长

58 days

期刊介绍： The Journal of Hazardous Materials serves as a global platform for promoting cutting-edge research in the field of Environmental Science and Engineering. Our publication features a wide range of articles, including full-length research papers, review articles, and perspectives, with the aim of enhancing our understanding of the dangers and risks associated with various materials concerning public health and the environment. It is important to note that the term "environmental contaminants" refers specifically to substances that pose hazardous effects through contamination, while excluding those that do not have such impacts on the environment or human health. Moreover, we emphasize the distinction between wastes and hazardous materials in order to provide further clarity on the scope of the journal. We have a keen interest in exploring specific compounds and microbial agents that have adverse effects on the environment.