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首页> 外文期刊>Science of the total environment >Decreasing aqueous mercury concentrations to meet the water quality criterion in fish: Examining the water-fish relationship in two point-source contaminated streams
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Decreasing aqueous mercury concentrations to meet the water quality criterion in fish: Examining the water-fish relationship in two point-source contaminated streams

机译：降低汞中的汞含量以满足水质标准：检查两条点源污染流中的水鱼关系

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摘要

East Fork Poplar Creek (EF) and White Oak Creek (WC) are two mercury-contaminated streams located on the United States (U.S.) Department of Energy Oak Ridge Reservation in East Tennessee. East Fork Poplar Creek is the larger and more contaminated of the two, with average aqueous mercury (Hg) concentrations exceeding those in reference streams by several hundred-fold. Remedial actions over the past 20 years have decreased aqueous Hg concentrations in EF by 85% (from > 1600 ng/L to <400 ng/L). Fish fillet concentrations, however, have not responded to this decrease in aqueous Hg and remain above the U.S. Environmental Protection Agency National Recommended Water duality Criteria (NRWQC) of 0.3 mg/kg. The lack of correlation between aqueous and fish tissue Hg concentrations in this creek has led to questions regarding the usefulness of target aqueous Hg concentrations and strategies for future remediation efforts. White Oak Creek has a similar contamination history but aqueous Hg concentrations in WC are an order of magnitude lower than in EF. Despite the lower aqueous Hg concentrations (< 100 ng/L), fish fillet concentrations in WC have also been above the NRWQC, making the aqueous Hg remediation goal of 200 ng/L in EF seem unlikely to result in an effective decrease in fillet Hg concentrations. Recent monitoring efforts in WC, however, suggest an aqueous total Hg threshold above which Hg bioaccumulation in fish may not respond. This new information could be useful in guiding remedial actions in EF and in other point-source contaminated streams.
机译：东叉杨树溪（EF）和白橡树溪（WC）是位于美国田纳西州东橡树岭保留地能源部的两条被汞污染的溪流。东叉杨树溪是两者中较大且污染最严重的地方，其平均含水汞（Hg）浓度比参考物流中的平均高数百倍。在过去的20年中，补救措施使EF中的Hg水溶液浓度降低了85％（从1600 ng / L降至<400 ng / L）。但是，鱼片浓度对水银汞含量的下降没有反应，并保持在美国环境保护署国家推荐的水对偶标准（NRWQC）0.3 mg / kg以上。在这条小河中，水和鱼类组织中的汞浓度之间缺乏相关性，这引起了有关目标水汞浓度的实用性和未来补救措施的策略的疑问。白橡树溪具有相似的污染历史，但WC中的水银汞浓度比EF中的水银汞浓度低一个数量级。尽管水中的汞含量较低（<100 ng / L），但WC中的鱼片浓度也高于NRWQC，使得EF中200 ng / L的水银修复目标似乎不太可能导致鱼片Hg的有效降低浓度。但是，最近在WC中进行的监测工作表明，总的汞总阈值超过该阈值，鱼类中的汞生物积累可能无法响应。这些新信息可能对指导EF和其他点源污染流中的补救措施很有用。

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  • 来源
    《Science of the total environment》 |2013年第15期|836-843|共8页
  • 作者

    Teresa J. Mathews; George Southworth; Mark J. Peterson; W. Kelly Roy; Richard H. Ketelle; Charles Valentine; Scott Gregory;

  • 作者单位

    Oak Ridge National Laboratory, Environmental Sciences Division, 1 Bethel Valley Road, PO Box 2008, Oak Ridge, TN 37831, United States;

    Oak Ridge National Laboratory, Environmental Sciences Division, 1 Bethel Valley Road, PO Box 2008, Oak Ridge, TN 37831, United States;

    Oak Ridge National Laboratory, Environmental Sciences Division, 1 Bethel Valley Road, PO Box 2008, Oak Ridge, TN 37831, United States;

    Oak Ridge National Laboratory, Environmental Sciences Division, 1 Bethel Valley Road, PO Box 2008, Oak Ridge, TN 37831, United States;

    URSICH2M Oak Ridge LLC (UCOR), K-1580, MS-7119, PO Box 4699, Oak Ridge, TN 37831, United States;

    Oak Ridge National Laboratory, Environmental Protection and Waste Services, 1 Bethel Valley Road, PO Box 2008, Oak Ridge, TN 37831, United States;

    Oak Ridge National Laboratory, Environmental Protection and Waste Services, 1 Bethel Valley Road, PO Box 2008, Oak Ridge, TN 37831, United States;

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  • 正文语种 eng
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  • 关键词

    mercury; bioaccumulation; fish; water; remediation;

    机译：汞;生物蓄积鱼;水;整治;

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