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首页> 外文期刊>Environmental Science & Technology >Airborne Petcoke Dust is a Major Source of Polycyclic Aromatic Hydrocarbons in the Athabasca Oil Sands Region
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Airborne Petcoke Dust is a Major Source of Polycyclic Aromatic Hydrocarbons in the Athabasca Oil Sands Region

机译：空中石油焦粉尘是阿萨巴斯卡油砂地区多环芳烃的主要来源

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摘要

Oil sands mining has been linked to increasing atmospheric deposition of polycyclic aromatic hydrocarbons (PAHs) in the Athabasca oil sands region (AOSR), but known sources cannot explain the quantity of PAHs in environmental samples. PAHs were measured in living Sphagnum moss (24 sites, n = 68), in sectioned peat cores (4 sites, n = 161), and snow (7 sites, n = 19) from ombrotrophic bogs in the AOSR, Prospective source samples were also analyzed, including petroleum coke (petcoke, from both delayed and fluid coking), fine tailings, oil sands ore, and naturally exposed bitumen. Average PAH concentrations in near-field moss (199 ng/g, n = 11) were significantly higher (p = 0.035) than in far-field moss (118 ng/g, n = 13), and increasing temporal trends were detected in three peat cores collected closest to industrial activity. A chemical mass-balance model estimated that delayed petcoke was the major source of PAHs to living moss, and among three peat core the contribution to PAHs from delayed petcoke increased over time, accounting for 45-95% of PAHs in contemporary layers. Petcoke was also estimated to be a major source of vanadium, nickel, and molybdenum. Scanning electron microscopy with energy-dispersive X-ray spectroscopy confirmed large petcoke particles (＞10 μm) in snow at near-field sites. Petcoke dust has not previously been considered in environmental impact assessments of oil sands upgrading, and improved dust control from growing stockpiles may mitigate future risks.
机译：油砂开采与阿萨巴斯卡油砂地区（AOSR）中大气中多环芳烃（PAHs）的沉积增加有关，但是已知来源无法解释环境样品中PAHs的数量。在AOSR的营养缺陷性沼泽中，在活的泥炭藓（24个地点，n = 68），切片的泥炭芯（4个地点，n = 161）和雪（7个地点，n = 19）中测量了多环芳烃，预期来源为还进行了分析，包括石油焦（延迟和流动焦化的焦炭），细尾矿，油砂矿石和自然暴露的沥青。近场苔藓中的平均PAH浓度（199 ng / g，n = 11）显着高于（p = 0.035），远场苔藓中的平均PAH浓度（118 ng / g，n = 13），并且在2004年发现了时间趋势的增加。三个最接近工业活动的泥炭芯。化学质量平衡模型估计，延迟的石油焦是生活中苔藓中PAHs的主要来源，并且在三个泥炭核心中，延迟的石油焦炭对PAHs的贡献随着时间的推移而增加，占当代层中PAHs的45-95％。据估计，石油焦也是钒，镍和钼的主要来源。扫描电子显微镜和能量色散X射线光谱学证实在近场地点的雪中有大的石油焦颗粒（＞ 10μm）。以前在油砂升级的环境影响评估中并未考虑使用石油焦粉尘，并且通过增加库存来改善粉尘控制可能会减轻未来的风险。

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  • 来源
    《Environmental Science & Technology》 |2016年第4期|1711-1720|共10页
  • 作者

    Yifeng Zhang; William Shotyk; Claudio Zaccone; Tommy Noernberg; Rick Pelletier; Beatriz Bicalho; Duane G. Froese; Lauren Davies; Jonathan W. Martin;

  • 作者单位

    Department of Laboratory Medicine and Pathology, University of Alberta, Edmonton, Alberta, Canada, T6G 2G3;

    Department of Renewable Resources, University of Alberta, 348B South Academic Building, Edmonton, Alberta, Canada, T6G 2H1;

    Department of the Sciences of Agriculture, Food and Environment, University of Foggia, 71122, Foggia, Italy;

    Department of Renewable Resources, University of Alberta, 348B South Academic Building, Edmonton, Alberta, Canada, T6G 2H1;

    Department of Renewable Resources, University of Alberta, 348B South Academic Building, Edmonton, Alberta, Canada, T6G 2H1;

    Department of Renewable Resources, University of Alberta, 348B South Academic Building, Edmonton, Alberta, Canada, T6G 2H1;

    Department of Earth and Atmospheric Sciences, University of Alberta, Edmonton, Alberta, Canada, T6G 2E3;

    Department of Earth and Atmospheric Sciences, University of Alberta, Edmonton, Alberta, Canada, T6G 2E3;

    Department of Laboratory Medicine and Pathology, University of Alberta, Edmonton, Alberta, Canada, T6G 2G3;

  • 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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