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首页> 外文期刊>Water, Air, and Soil Pollution >Enhanced Degradation of Atrazine by Soil Microbial Fuel Cells and Analysis of Bacterial Community Structure
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Enhanced Degradation of Atrazine by Soil Microbial Fuel Cells and Analysis of Bacterial Community Structure

机译：土壤微生物燃料电池对阿特拉津的增强降解作用及细菌群落结构分析

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摘要

Atrazine degradation in soil microbial fuel cells (MFCs) under different anode depths and initial concentrations is investigated for different redox soil conditions, and the microbial communities in the anode and different layers are evaluated. Atrazine degradation is fastest in the upper layer (aerobiotic), followed by the lower layer (anaerobic). A removal efficiency and a halflife of 91.69% and 40 days, respectively, are reported for an anode depth of 4 cm. The degradation rate is found to be dependent on current generation in the soil MFCs rather than on electrode spacing. Furthermore, the degradation rate is inhibited when the initial atrazine concentration is increased from 100 to 750 mg/kg. Meanwhile, the exoelectrogenic bacteria, Deltaproteobacteria and Geobacter, are enriched on the anode and the lower layer in the soilMFCs, while atrazine-degrading Pseudomonas is only observed in very low proportions. In particular, the relative abundances of Deltaproteobacteria and Geobacter are higher for lower initial atrazine concentrations. These results demonstrate that the mechanism of atrazine degradation in soil MFCs is dependent on bioelectrochemistry rather than onmicrobial degradation.
机译：在不同的氧化还原土壤条件下，研究了在不同阳极深度和初始浓度下土壤微生物燃料电池（MFCs）中去津的降解情况，并评估了阳极和不同层中的微生物群落。 r去津降解最快的是上层（好氧），其次是下层的（厌氧）。阳极深度为4 cm时，去除效率和半衰期分别为91.69％和40天。发现降解速率取决于土壤MFC中的电流生成，而不是取决于电极间距。此外，当初始at去津浓度从100 mg / kg增加到750 mg / kg时，降解速率受到抑制。同时，外生电细菌，Deltaproteobacteria和Geobacter，富集在土壤MFCs的阳极和下层，而阿特拉津降解的假单胞菌仅以极低的比例观察到。特别地，对于较低的初始at去津浓度，Deltaproteobacteria和Geobacter的相对丰度较高。这些结果表明，土壤MFCs中r去津降解的机理取决于生物电化学，而不是微生物降解。

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  • 来源
    《Water, Air, and Soil Pollution》 |2017年第8期|308.1-308.10|共10页
  • 作者

    Wang Hui; Li Lei; Cao Xian; Long Xizi; Li Xianning;

  • 作者单位

    Southeast Univ, Sch Energy & Environm, Nanjing 210096, Jiangsu, Peoples R China;

    Southeast Univ, Sch Energy & Environm, Nanjing 210096, Jiangsu, Peoples R China;

    Southeast Univ, Sch Energy & Environm, Nanjing 210096, Jiangsu, Peoples R China;

    Southeast Univ, Sch Energy & Environm, Nanjing 210096, Jiangsu, Peoples R China;

    Southeast Univ, Sch Energy & Environm, Nanjing 210096, Jiangsu, Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Bioelectrochemistry; Degradation rate; Exoelectrogenic bacteria; Soil microbial fuel cells;

    机译：生物电化学;降解速率;外生电细菌;土壤微生物燃料电池;

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