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Solute pools in Nikanotee Fen watershed in the Athabasca oil sands region

机译:阿萨巴斯卡油砂地区尼加诺德芬分水岭的溶质池

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摘要

aOverburden and tailings materials from oil sands production were used as construction materials as part of a novel attempt to create a self-sustaining, peat accumulating fen-upland ecosystem. To evaluate the potential for elemental release from the construction materials, total elemental concentrations in the tailings sand, petroleum coke and peat used to construct a fen ecosystem were determined using microwave-assisted acid digestions and compared to a leaching experiment conducted under environmentally-relevant conditions. A comparison of solid phase to aqueous Na, Ca, S and Mg concentrations showed they were highly leachable in the materials: Given that the concentrations of these elements can affect plant community structure, it is important to understand their leachability and mobility as they migrate between materials used to construct the system. To that end, a mass balance of aqueous Na, Ca, S and Mg was conducted based on leaching experiments and materials analysis coupled with existing data from the constructed system. The data indicate that there is a large pool of leachable Na, Ca, S and Mg in the system, estimated at 27 t of Na, 14 t of Ca, 37.3 t of S and 8.8 t of Mg. Since recharge mainly drives the fen-upland system water regime, and discharge in the fen, evapo-accumulation of these solutes on the surface may occur. (C) 2017 Elsevier Ltd. All rights reserved.
机译:a将油砂生产中的覆盖层和尾矿材料用作建筑材料,以此来创建自我维持的,积累泥炭的芬高地生态系统。为了评估元素从建筑材料中释放的可能性,使用微波辅助酸消解法确定了用于构建芬生态系统的尾矿砂,石油焦和泥炭中的元素总浓度,并将其与在与环境相关的条件下进行的浸出实验进行了比较。 。固相与Na,Ca,S和Mg水溶液的浓度比较表明,它们在材料中具有很高的浸出性:鉴于这些元素的浓度会影响植物群落结构,因此了解它们之间的浸出性和迁移性非常重要。用于构建系统的材料。为此,基于浸出实验和材料分析以及所构建系统的现有数据,进行了Na,Ca,S和Mg水溶液的质量平衡。数据表明,系统中存在大量可浸出的Na,Ca,S和Mg,估计为Na的27吨,Ca的14吨,S的37.3吨和Mg的8.8吨。由于补给主要驱动fen-upland系统的水情,而在fen中排放,因此可能会在表面上发生这些溶质的蒸发积聚。 (C)2017 Elsevier Ltd.保留所有权利。

著录项

  • 来源
    《Environmental Pollution》 |2017年第6期|150-162|共13页
  • 作者单位

    Univ Waterloo, Dept Geog, Waterloo, ON N2L 3G1, Canada;

    Univ Waterloo, Dept Geog, Waterloo, ON N2L 3G1, Canada;

    Univ Waterloo, Water Inst, Ecohydrol Res Grp, Waterloo, ON, Canada|Univ Waterloo, Dept Earth & Environm Sci, Waterloo, ON, Canada;

    Univ Waterloo, Water Inst, Ecohydrol Res Grp, Waterloo, ON, Canada|Univ Waterloo, Dept Earth & Environm Sci, Waterloo, ON, Canada;

    Univ Waterloo, Water Inst, Ecohydrol Res Grp, Waterloo, ON, Canada|Univ Waterloo, Dept Earth & Environm Sci, Waterloo, ON, Canada;

    Univ Waterloo, Water Inst, Ecohydrol Res Grp, Waterloo, ON, Canada|Univ Waterloo, Dept Earth & Environm Sci, Waterloo, ON, 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

    Tailings sand; Peat; Constructed fen; Oil sands; Solute; Reclamation;

    机译:尾矿砂;泥炭;人工粉;油砂;溶质;填海;

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