Biofilm electrode reactor coupled manganese ore substrate up-flow microbial fuel cell-constructed wetland system: High removal efficiencies of antibiotic, zinc (II), and the corresponding antibiotic resistance genes,Journal of Hazardous Materials

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Biofilm electrode reactor coupled manganese ore substrate up-flow microbial fuel cell-constructed wetland system: High removal efficiencies of antibiotic, zinc (II), and the corresponding antibiotic resistance genes
Journal of Hazardous Materials ( IF 12.2 ) Pub Date : 2023-08-24 , DOI: 10.1016/j.jhazmat.2023.132394
Hua Li ₁ , Haipeng Cao ₁ , Tao Li ₁ , Zhiming He ₂ , Jinhui Zhao ₁ , Yifeng Zhang ₂ , Hai-Liang Song ₃

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A coupled system comprised of a biofilm electrode reactor (BER) and a manganese ore substrate microbial fuel cell-constructed wetland (MFC-CW) system was used to remove co-exposed antibiotic and Zn (II), as well as simultaneously reduce copies of antibiotic resistance genes (ARGs) in the current study. In this system, BER primarily reduced the concentrations of antibiotics and Zn (II), and the effluent was used as the input to the MFC-CW, thereby providing electricity to BER. Co-exposure to a high concentration of Zn (II) decreased the relative abundances (RAs) of ARGs in the BER effluent, whereas the remaining sub-lethal concentration of Zn (II) increased the RAs of ARGs in the MFC-CW effluent. Even though the absolute copies of ARGs in the effluents increased during co-exposure, the total number of target ARG copies in the effluent of MFC-CW was significantly lower than that of BER. Moreover, BER pre-treatment eliminated most of Zn (II), which improved the electrical power generation characteristic of the MFC-CW unit. Correspondingly, the bacterial community and the ARGs hosts were analyzed to demonstrate the mechanism. In conclusion, the coupled system demonstrates significant potential to reduce antibiotics, Zn (II) and environmental risks posed by ARGs.

中文翻译：

生物膜电极反应器耦合锰矿基质上流微生物燃料电池构建的湿地系统：抗生素、锌（II）和相应的抗生素耐药基因的高去除效率

在本研究中，由生物膜电极反应器（BER）和锰矿基质微生物燃料电池构建的湿地（MFC-CW）系统组成的耦合系统用于去除共暴露的抗生素和 Zn （II），同时减少抗生素耐药基因（ARG）的拷贝。在该系统中，BER 主要降低了抗生素和 Zn （II）的浓度，并将污水用作 MFC-CW 的输入，从而为 BER 供电。共暴露于高浓度的 Zn （II）降低了 BER 流出物中 ARGs 的相对丰度（RAs），而剩余的亚致死浓度 Zn （II）增加了 MFC-CW 流出物中 ARGs 的 RAs。尽管在共暴露期间流出物中 ARGs 的绝对拷贝数增加，但 MFC-CW 流出物中目标 ARG 拷贝总数显著低于 BER。此外，BER 预处理去除了大部分 Zn （II），从而改善了 MFC-CW 装置的发电特性。相应地，分析了细菌群落和 ARGs 宿主以证明其机制。总之，该偶联系统在减少抗生素、锌（II）和 ARGs 带来的环境风险方面具有巨大潜力。

更新日期：2023-08-24

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