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Assessing Risks of Shallow Riparian Groundwater Quality Near an Oil Sands Tailings Pond

机译：评估油砂尾矿池附近河岸浅水质量的风险

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The potential discharge of groundwater contaminated by oil sands process-affected water (OSPW) is a concern for aquatic ecosystems near tailings ponds. Groundwater in the area, but unaffected by OSPW, may contain similar compounds, complicating the assessment of potential ecological impacts. In this study, 177 shallow groundwater samples were collected from riparian areas along the Athabasca River and tributaries proximate to oil sands developments. For "pond-site" samples (71; adjacent to study tailings pond), Canadian aquatic life guidelines were exceeded for 11 of 20 assessed compounds. However, "non-pond" samples (54; not near any tailings pond) provided similar exceedances. Statistical analyses indicate that pond-site and non-pond samples were indistinguishable for all but seven parameters assessed, including salts, many trace metals, and fluorescence profiles of aromatic naphthenic acids (ANA). This suggests that, regarding the tested parameters, groundwater adjacent to the study tailings pond generally poses no greater ecological risk than other nearby groundwaters at this time. Multivariate analyses applied to the groundwater data set separated into 11 smaller zones support this conclusion, but show some variation between zones. Geological and potential OSPW influences could not be distinguished based on major ions and metals concentrations. However, similarities in indicator parameters, namely ANA, F, Mo, Se, and Na-Cl ratio, were noted between a small subset of samples from two pond-site zones and two OSPW samples and two shallow groundwater samples documented as likely OSPW affected. This indicator-based screening suggests that OSPW-affected groundwater may be reaching Athabasca River sediments at a few locations.
机译：尾矿池附近的水生生态系统担心被油砂工艺影响水（OSPW）污染的地下水的潜在排放。该地区的地下水，但不受OSPW的影响，可能包含类似的化合物，使对潜在生态影响的评估变得复杂。在这项研究中，从阿萨巴斯卡河沿岸的河岸地区和靠近油砂开发的支流收集了177个浅层地下水样本。对于“池塘部位”样品（71个；与研究尾矿池相邻），超过了20种评估化合物中的11种的加拿大水生生物准则。但是，“非池塘”样本（54；不在任何尾矿池附近）提供了类似的超出范围。统计分析表明，除了七个评估参数外，池塘现场样本和非池塘样本几乎没有区别，包括盐，多种痕量金属和芳香族环烷酸（ANA）的荧光图。这表明，就测试参数而言，此时与研究尾矿池相邻的地下水通常不会比附近的其他地下水造成更大的生态风险。应用于划分为11个较小区域的地下水数据集的多变量分析支持此结论，但显示区域之间存在一些差异。无法根据主要离子和金属浓度来区分地质和潜在的OSPW影响。但是，在两个池塘现场区域的一小部分样本与两个OSPW样本和两个浅层地下水样本之间记录了指示性参数（即ANA，F，Mo，Se和Na-Cl比率）的相似性，记录为OSPW可能受到影响。这种基于指标的筛选表明，受OSPW影响的地下水可能会在一些位置到达阿萨巴斯卡河沉积物。

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  • 来源
    《Ground water》 |2016年第4期|545-558|共14页
  • 作者

    Roy J. W.; Bickerton G.; Frank R. A.; Grapentine L.; Hewitt L. M.;

  • 作者单位

    Environm Canada, Water Sci & Technol Directorate, 867 Lakeshore Rd, Burlington, ON L7R 4A6, Canada;

    Environm Canada, Water Sci & Technol Directorate, 867 Lakeshore Rd, Burlington, ON L7R 4A6, Canada;

    Environm Canada, Water Sci & Technol Directorate, 867 Lakeshore Rd, Burlington, ON L7R 4A6, Canada;

    Environm Canada, Water Sci & Technol Directorate, 867 Lakeshore Rd, Burlington, ON L7R 4A6, Canada;

    Environm Canada, Water Sci & Technol Directorate, 867 Lakeshore Rd, Burlington, ON L7R 4A6, Canada;

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