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首页> 外文期刊>Environmental Science & Technology >Bioelectrochemical Chromium(Ⅵ) Removal in Plant-Microbial Fuel Cells
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Bioelectrochemical Chromium(Ⅵ) Removal in Plant-Microbial Fuel Cells

机译：植物微生物燃料电池中生物电化学除铬（Ⅵ）的研究

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摘要

Plant-microbial fuel cell (PMFC) is a renewable and sustainable energy technology that generates electricity with living plants. However, little information is available regarding the application of PMFC for the remediation of heavy metal contaminated water or soil. In this study, the potential for the removal of heavy metal Cr(Ⅵ) using PMFC was evaluated, and the performance of the PMFC at various initial Cr(Ⅵ) contents was investigated. The Cr(Ⅵ) removal efficiency could reached 99% under various conditions. Both the Cr(Vl) removal rates and the removal efficiencies increased with the increasing initial Cr(Ⅵ) concentration. Furthermore, the long-term operation of the PMFC indicated that the system was stable and sustainable for Cr(Ⅵ) removal. The mass balance results and XPS analysis results demonstrate that only a small amount of soluble Cr(Ⅲ) remained in the PMFC and that most Cr(Ⅲ) precipitated in the form of the Cr(OH)_(3(s)) or was adsorbed onto the electrodes. The PMFC experiments of without acetate addition also show that plants can provide carbon source for MFC through secrete root exudates and bioelectrochemical reduction of Cr(Vl) was the main mechanism for the Cr(Ⅵ) removal. These results extend the application fields of PMFC and might provide a new insight for Cr(Ⅵ) removal from wastewater or soil.
机译：植物微生物燃料电池（PMFC）是一种可再生，可持续的能源技术，可以通过活植物发电。但是，有关PMFC在修复重金属污染的水或土壤中的应用的信息很少。在这项研究中，评估了使用PMFC去除重金属Cr（Ⅵ）的潜力，并研究了在各种初始Cr（Ⅵ）含量下PMFC的性能。在各种条件下，Cr（Ⅵ）的去除率可达到99％。 Cr（Vl）的去除率和去除效率均随初始Cr（Ⅵ）浓度的增加而增加。此外，PMFC的长期运行表明该系统对于去除Cr（Ⅵ）稳定且可持续。质量平衡结果和XPS分析结果表明，PMFC中仅残留少量可溶性Cr（Ⅲ），并且大多数Cr（Ⅲ）以C​​r（OH）_（3（s））或吸附到电极上。不添加乙酸盐的PMFC实验还表明，植物可以通过分泌的根系分泌物为MFC提供碳源，Cr（Vl）的生物电化学还原是Cr（Ⅵ）去除的主要机理。这些结果扩展了PMFC的应用领域，并可能为废水或土壤中Cr（Ⅵ）的去除提供新的见解。

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  • 来源
    《Environmental Science & Technology》 |2016年第7期|3882-3889|共8页
  • 作者

    Nuzahat Habibul; Yi Hu; Yun-Kun Wang; Wei Chen; Han-Qing Yu; Guo-Ping Sheng;

  • 作者单位

    CAS Key Laboratory of Urban Pollutant Conversion, Department of Chemistry, University of Science and Technology of China, Hefei, 230026 China,College of Chemistry and Chemical Engineering, Xinjiang Normal University, Urumqi, 830054, China;

    CAS Key Laboratory of Urban Pollutant Conversion, Department of Chemistry, University of Science and Technology of China, Hefei, 230026 China;

    CAS Key Laboratory of Urban Pollutant Conversion, Department of Chemistry, University of Science and Technology of China, Hefei, 230026 China;

    CAS Key Laboratory of Urban Pollutant Conversion, Department of Chemistry, University of Science and Technology of China, Hefei, 230026 China;

    CAS Key Laboratory of Urban Pollutant Conversion, Department of Chemistry, University of Science and Technology of China, Hefei, 230026 China;

    CAS Key Laboratory of Urban Pollutant Conversion, Department of Chemistry, University of Science and Technology of China, Hefei, 230026 China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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