Accelerated removal and mechanism of tetracycline from water using immobilized bacteria combined with microalgae

文献类型： 外文期刊

第一作者： Wang, Jinli

作者： Wang, Jinli;Chen, Xiangnan;Sun, Haibo;Li, Xueying;Lu, Qiang;Qin, Pufeng;Yang, Yang;Luo, Lin;Yang, Yuan;Wu, Zhibin;Wang, Jinli;Chen, Xiangnan;Sun, Haibo;Li, Xueying;Lu, Qiang;Qin, Pufeng;Yang, Yang;Luo, Lin;Yang, Yuan;Wu, Zhibin;Wang, Jinli;Chen, Xiangnan;Li, Xueying;Lu, Qiang;Qin, Pufeng;Yang, Yang;Luo, Lin;Yang, Yuan;Wu, Zhibin;Lai, Dengni;Peng, Xin

作者机构：

关键词： Tetracycline; Alcaligenes faecalis; Microalgae; Wastewater treatment; Mechanisms of removal

期刊名称：JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING （ 影响因子：7.2； 五年影响因子：7.6 ）

ISSN： 2213-2929

年卷期： 2025 年 13 卷 2 期

页码：

收录情况： SCI

摘要： In this study, an Alcaligenes faecalis strain (R1) with tetracycline (TC) degradation ability was screened out and immobilized on polyvinyl alcohol (PVA)-sodium (SA) alginate-perylene diimide (PDI) complex for TC removal combining with Tetradesmus obliquu (TO). The optimization of screening and immobilization of R1 as well as the influencing factors and mechanisms of R1 combined with microalgae for TC removal were systematically investigated. The research findings reveal that the immobilization technology effectively aggregates free bacterial cells, providing ample adhesion points and thereby enhancing the degradation process. Under the conditions of 10 mg/L TC concentration, the synergistic action with TO achieves a removal rate of 93.87 % within 1.25 days, significantly reducing the degradation time and improving the degradation efficiency compared to individual bacteria and immobilized bacteria. Analysis of degradation intermediates suggests the synergism stems from the symbiotic system established between the immobilized Alcaligenes faecalis and the alga. Through transformations involving demethylation, dehydration, and ring-opening reactions, TC is efficiently converted into carbon dioxide and water. This multi-faceted approach not only underscores the innovative combined use of microbial and algal systems for effective antibiotic removal but also highlights its potential as a superior bioremediative strategy.

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