首页> 外文期刊>Journal of Hazardous Materials >Remediation of PAH polluted soils using a soil microbial fuel cell: Influence of electrode interval and role of microbial community
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Remediation of PAH polluted soils using a soil microbial fuel cell: Influence of electrode interval and role of microbial community

机译:利用土壤微生物燃料电池修复PAH污染土壤:电极间隔和微生物群落作用的影响

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摘要

The soil microbial fuel cells (SMFCs) were constructed to remediate soils contaminated by polycyclic aromatic hydrocarbons (PAHs). With a maximum power density of 12.1 mW m(-2) and an internal resistance of 470 Omega, a closed SMFC showed electricity generation comparable to that by an open SMFC after 175 days of operation and meanwhile increased the removal rates of anthracene, phenanthrene, and pyrene to 54.2 +/- 2.7%, 42.6 +/- 1.9% and 27.0 +/- 2.1% from 20.8 +/- 1.1%, 17.3 +/- 1.2% and 11.7 +/- 0.9%, respectively, by the open SMFC. Both the electricity generation and the removal of PAHs increased with the decreased electrode interval. When the electrode interval ranged between 4 cm and 10 cm, the more closely the electrodes were positioned, the more efficient the electricity generation and removal of PAHs became. Dominated by the genus of Geobacter, the SMFC was enriched in electrogenic bacteria at the anode surface, and the growth of certain microbes other than electrogenic bacteria in the soil was improved by electrical stimulation. This finding reveals the critical mechanism underlying electricity generation and improved the removal of PAHs. (C) 2017 Elsevier B.V. All rights reserved.
机译:土壤微生物燃料电池(SMFCs)可以修复多环芳烃(PAHs)污染的土壤。在运行175天后,闭合的SMFC的最大功率密度为12.1 mW m(-2),内部电阻为470Ω,其发电量与打开的SMFC相当,同时提高了蒽,菲, pyr从20.8 +/- 1.1%,17.3 +/- 1.2%和11.7 +/- 0.9%分别降至54.2 +/- 2.7%,42.6 +/- 1.9%和27.0 +/- 2.1% SMFC。随着电极间隔的减小,发电量和PAHs的去除量均增加。当电极间隔在4厘米和10厘米之间时,电极放置得越紧密,发电和去除PAH的效率就越高。以土壤杆菌属为主,SMFC的阳极表面富含电致细菌,通过电刺激改善了土壤中除电致细菌之外的某些微生物的生长。这一发现揭示了发电的关键机制并改善了多环芳烃的去除。 (C)2017 Elsevier B.V.保留所有权利。

著录项

  • 来源
    《Journal of Hazardous Materials》 |2017年第15期|110-118|共9页
  • 作者

    Yu Bao; Tian Jing; Feng Liu;

  • 作者单位

    Beijing Univ Chem Technol, Dept Environm Sci & Engn, Beijing 100029, Peoples R China;

    Beijing Univ Chem Technol, Dept Environm Sci & Engn, Beijing 100029, Peoples R China;

    Beijing Univ Chem Technol, Dept Environm Sci & Engn, Beijing 100029, Peoples R 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);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Polycyclic aromatic hydrocarbon; Soil microbial fuel cell; Electrode interval; Bioremediation;

    机译:多环芳烃;土壤微生物燃料电池;电极间隔;生物修复;

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