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首页> 外文期刊>Environmental Science & Technology >Century-Long Source Apportionment of PAHs in Athabasca Oil Sands Region Lakes Using Diagnostic Ratios and Compound-Specific Carbon Isotope Signatures
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Century-Long Source Apportionment of PAHs in Athabasca Oil Sands Region Lakes Using Diagnostic Ratios and Compound-Specific Carbon Isotope Signatures

机译：利用诊断率和化合物特异性碳同位素特征在阿萨巴斯卡油砂地区湖泊中多环芳烃的百年源分配

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摘要

Evaluating the impact that airborne contamination associated with Athabasca oil sands (AOS) mining operations has on the surrounding boreal forest ecosystem requires a rigorous approach to source discrimination. This study presents a century-long historical record of source apportionment of polycyclic aromatic hydrocarbons (PAHs) in dated sediments from two headwater lakes located approximately 40 and 55 km east from the main area of open pit mining activities. Concentrations of the 16 Environmental Protection Agency (EPA) priority PAHs in addition to retene, dibenzothiophene (DBT), and six alkylated groups were measured, and both PAH molecular diagnostic ratios and carbon isotopic signatures (δ~(13)C) of individual PAHs were used to differentiate natural from anthropogenic inputs. Although concentrations of PAHs in these lakes were low and below the Canadian Council of Ministers of the Environment (CCME) guidelines, diagnostic ratios pointed to an increasingly larger input of petroleum-derived (i.e., petrogenic) PAHs over the past 30 years concomitant with δ~(13)C values progressively shifting to the value of unprocessed AOS bitumen. This petrogenic source is attributed to the deposition of bitumen in dust particles associated with wind erosion from open pit mines.
机译：要评估与阿萨巴斯卡油砂（AOS）采矿作业相关的空气传播污染对周围的北方森林生态系统的影响，需要采取严格的方法来识别来源。这项研究提供了长达一个世纪的历史记录，记录了两个露天矿活动主要地区以东约40和55公里的上游水源的陈年沉积物中多环芳烃（PAH）的来源分配。除了检测视黄烯，二苯并噻吩（DBT）和六个烷基化基团外，还测量了16种环境保护局（EPA）优先PAH的浓度，并且各个PAH的PAH分子诊断率和碳同位素特征（δ〜（13）C）被用来区分自然和人为输入。尽管这些湖泊中的PAHs浓度较低且低于加拿大环境部长理事会（CCME）的指导原则，但诊断率表明，过去30年中，石油衍生的（即成岩性）PAHs的输入量越来越大，并伴有δ 〜（13）C值逐渐移至未处理的AOS沥青的值。这种成岩源可归因于露天矿产生的风蚀引起的尘埃颗粒中沥青的沉积。

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  • 来源
    《Environmental Science & Technology》 |2013年第12期|6155-6163|共9页
  • 作者

    Josue Jautzy; Jason M. E. Ahad; Charles Gobeil; Martine M. Savard;

  • 作者单位

    INRS Eau Terre Environnement, Quebec, QC, G1K 9A9, Canada;

    Geological Survey of Canada, Natural Resources Canada, Quebec, QC, G1K 9A9, Canada;

    INRS Eau Terre Environnement, Quebec, QC, G1K 9A9, Canada;

    Geological Survey of Canada, Natural Resources Canada, Quebec, QC, G1K 9A9, 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
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