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首页> 外文期刊>Journal of environmental sciences >Variations in concentrations and bioavailability of heavy metals in rivers caused by water conservancy projects: Insights from water regulation of the Xiaolangdi Reservoir in the Yellow River
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Variations in concentrations and bioavailability of heavy metals in rivers caused by water conservancy projects: Insights from water regulation of the Xiaolangdi Reservoir in the Yellow River

机译：水利项目引起的河流中重金属浓度和生物利用度的变化：黄河小浪迪水库水监管见解

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摘要

Water regulation of the Xiaolangdi Reservoir of the Yellow River was chosen as a case to investigate variations in concentrations and bioavailability of heavy metals caused by water conservancy projects in rivers. Water and suspended sediment (SPS) samples were collected at downstream sampling sites along the river during this period. Concentrations and speciation of Zn, Cr, Cu, Ni, and Pb in water and SPS samples were analyzed, and their bioaccumulation was studied withDaphnia magna. This study indicated that the exchangeable and carbonate-bound fractions of heavy metals in SPS decreased along the studied stretch, and the dissolved heavy metal concentrations increased along the river with 1.6–15 folds. This is because sediment resuspension increased along the river during water regulation, giving rise to the increase of heavy metal release from SPS. The dissolved Zn, Cu, Ni, and Pb concentrations were significantly positively correlated with SPS concentrations, and their increase along the river was greater than Cr. The body burdens of heavy metals inD. magnaexposed into samples collected from the reservoir outlet were 1.3–3.0 times lower than those from downstream stations, suggesting that the heavy metal bioavailability increased during water regulation. This should be considered in the reservoir operation.
机译：选择了黄河小兰迪水库的水监管作为调查河流水利项目造成的重金属浓度和生物利用度的变化。在此期间，在沿河的下游采样点收集水和悬浮沉积物（SPS）样品。分析了水和SPS样品中Zn，Cr，Cu，Ni和Pb的浓度和形态，并研究了它们的生物累积。该研究表明，SPS中重金属的可交换和碳酸盐结合级数沿着研究的拉伸下降，溶解的重金属浓度沿河流增加，沿河流增加1.6-15倍。这是因为在水调节过程中沿河流增加了沉积物重避，从而产生了来自SPS的重金属释放的增加。溶解的Zn，Cu，Ni和Pb浓度与SPS浓度显着呈正相关，并且它们沿河流的增加大于Cr。身体负担重金属IND。从储存器出口收集的样品中的麦克解量比下游站低1.3-3.0倍，表明在水调节期间重金属生物利用度增加。这应该在水库操作中考虑。

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  • 来源
    《Journal of environmental sciences》 |2018年第2018期|共9页
  • 作者

    Jianwei Dong; Xinghui Xia; Zhining Zhang; Zixuan Liu; Xiaotian Zhang; Husheng Li;

  • 作者单位

    State Key Laboratory of Water Environment Simulation Key Laboratory for Water and Sediment Sciences of Ministry of Education School of Environment Beijing Normal University;

    State Key Laboratory of Water Environment Simulation Key Laboratory for Water and Sediment Sciences of Ministry of Education School of Environment Beijing Normal University;

    State Key Laboratory of Water Environment Simulation Key Laboratory for Water and Sediment Sciences of Ministry of Education School of Environment Beijing Normal University;

    State Key Laboratory of Water Environment Simulation Key Laboratory for Water and Sediment Sciences of Ministry of Education School of Environment Beijing Normal University;

    State Key Laboratory of Water Environment Simulation Key Laboratory for Water and Sediment Sciences of Ministry of Education School of Environment Beijing Normal University;

    State Key Laboratory of Water Environment Simulation Key Laboratory for Water and Sediment Sciences of Ministry of Education School of Environment Beijing Normal University;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 环境污染及其防治;
  • 关键词

    Heavy metals; Speciation; Bioaccumulation; Suspended sediment; Dam; Water conservancy project;

    机译：重金属;物种;生物累积;悬浮沉积物;水坝;水利项目;

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