Efficient Removal of Butachlor and Change in Microbial Community Structure in Single-Chamber Microbial Fuel Cells
Efficient Removal of Butachlor and Change in Microbial Community Structure in Single-Chamber Microbial Fuel Cells
复制标题
单室微生物燃料电池中丁草胺的高效去除及微生物群落结构的变化
DOI：
10.3390/ijerph16203897
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发表时间：
2019-10-01
影响因子：
--
通讯作者：
Li, Yongtao
中科院分区：
文献类型：
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作者：
Li, Xiaojing;Li, Yue;Li, Yongtao
微生物电化学技术提供了取之不尽用之不竭的电子受体，使电活性微生物产生生物电流，加速有机物的去除。丁草胺是水田中常用的氯乙酰胺除草剂，其污染废水的处理一直是困扰农业生产的难题。在这项研究中，丁草胺在构建的单室微生物燃料电池(MFC)中被有效地(90+/-1%)和快速(1天)去除。在以丁草胺为唯一碳源的MFC中加入乙酸钠后，不仅没有提高丁草胺的降解率，反而恢复了发电量。同时，随着丁草胺的生物电化学降解，加入丁草胺后，阳极和阴极生物膜中的微生物群落结构发生了变化。高通量测序显示，在以丁草胺为唯一碳源的MFC中，副球藻和地杆菌在MFC中增殖；在以丁草胺和乙酸钠为伴随碳源的MFC中，Butanivans在MFC中增殖。这些物种具有氧化丁草胺不同取代基的能力，在废水、沉积物和土壤的生物修复方面具有重要的潜在用途。
Microbial electrochemical technology provides an inexhaustible supply of electron acceptors, allowing electroactive microorganisms to generate biocurrent and accelerate the removal of organics. The treatment of wastewater contaminated by butachlor, which is a commonly used chloroacetamide herbicide in paddy fields, is a problem in agricultural production. In this study, butachlor was found to be removed efficiently (90 +/- 1%) and rapidly (one day) in constructed single-chamber microbial fuel cells (MFCs). After the addition of sodium acetate to MFCs with butachlor as the sole carbon source, electricity generation was recovered instead of increasing the degradation efficiency of butachlor. Meanwhile, the microbial community structure was changed in anodic and cathodic biofilms after the addition of butachlor, following the bioelectrochemical degradation of butachlor. High-throughput sequencing showed the proliferation of Paracoccus and Geobacter in MFCs with butachlor as the sole carbon source and of Thauera butanivorans in MFCs with butachlor and sodium acetate as concomitant carbon sources. These species possess the ability to oxidize different substituents of butachlor and have important potential use for the bioremediation of wastewater, sediments, and soils.