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首页> 外文期刊>Journal of Hazardous Materials >Naphthenic acid anaerobic biodegrading consortia enriched from pristine sediments underlying oil sands tailings ponds
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Naphthenic acid anaerobic biodegrading consortia enriched from pristine sediments underlying oil sands tailings ponds

机译：环烷酸厌氧生物降解联盟富原始沉积物底层油山尾矿池塘

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摘要

Seepage from oil sands tailings ponds (OSTP), which contain toxic naphthenic acids (NAs), can infiltrate into groundwater. Clay sediment layer beneath is a critical barrier for reducing the infiltration of NAs into the sand sediment layer, where groundwater channels reside. Biodegradation has great potential as a strategy for NAs removal, but little is known about NAs biodegradability and potential functional microbes in these pristine sediments. This study investigated the potential for anaerobic biodegradation of NAs by microbial consortia enriched from clay and sand sediments underlying OSTP, amended with either acid extracted organics or Merichem NAs, under nitrate- and sulfate-reducing conditions. Degradation of NAs only be detected after DOC concentration reached to steady state after 163 days. Microbial community analysis shows that different electron acceptors, sediment types, and NAs sources associated with specific microbial taxa and can explain 14.8, 13.9 % and 5% of variation of microbial community structures, respectively. The DOC and methane were the most important geochemical properties for microbial community variations. This study approved the potential capability of indigenous microbial communities from the pristine sediments in NA degradation, demonstrating the barrier function of pristine clay sediments underlying OSTP in prohibiting organic contaminants from entering into groundwater.
机译：来自油砂尾矿池塘（OSTP）的渗透池（OSTP），含有有毒环烷酸（NAS），可以渗入地下水中。下面的粘土沉积物是减少NAS进入沙沉积层的关键障碍，地下水通道所在的渗透层。生物降解具有巨大的潜力作为NAS去除的策略，但对于这些原始沉积物中的NAS生物降解性和潜在的功能微生物而言毫无少。本研究研究了通过从粘土和砂沉积物中富集的微生物联结对NAS进行厌氧生物降解的可能性，在硝酸盐和硫酸盐降低条件下，用酸萃取的有机物或单体NAS进行修复。在163天后DOP浓度达到稳定状态后，才会检测NAS的降解。微生物群落分析表明，不同的电子受体，沉积物类型和与特异性微生物分类群相关的NAS源，分别可以解释14.8％，13.9％和5％的微生物群落结构的变异。 DOC和甲烷是微生物群落变异的最重要的地球化学性质。本研究批准了本土微生物群落来自Na降解的原始沉积物的潜在能力，证明了原始粘土沉积物的屏障函数在禁止有机污染物进入地下水中。

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  • 来源
    《Journal of Hazardous Materials》 |2020年第jul15期|122546.1-122546.9|共9页
  • 作者

    Lv Xiaofei; Ma Bin; Cologgi Dena; Lee Korris; Ulrich Ania;

  • 作者单位

    China Jiliang Univ Dept Environm Engn Hangzhou 310018 Peoples R China|Zhejiang Univ Coll Environm & Resource Sci Inst Soil & Water Resources & Environm Sci Hangzhou 310058 Peoples R China;

    Zhejiang Univ Coll Environm & Resource Sci Inst Soil & Water Resources & Environm Sci Hangzhou 310058 Peoples R China|Univ Alberta Dept Civil & Environm Engn Edmonton AB T6G 2W2 Canada;

    Univ Alberta Dept Civil & Environm Engn Edmonton AB T6G 2W2 Canada;

    Univ Alberta Dept Civil & Environm Engn Edmonton AB T6G 2W2 Canada;

    Univ Alberta Dept Civil & Environm Engn Edmonton AB T6G 2W2 Canada;

  • 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

    Anaerobic microcosms; Indigenous microorganisms; Naphthenic acids; Oil sands tailings ponds; Pristine sediments;

    机译：厌氧微观物体;土着微生物;环烷酸;油砂尾矿池;原始沉积物;

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