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小浪底水库鱼体和沉积物中汞稳定同位素组成特征

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花秀兵, 毛宇翔, 刘洪伟, 程柳, 史建波, 江桂斌. 小浪底水库鱼体和沉积物中汞稳定同位素组成特征[J]. 环境化学, 2016, 35(11): 2245-2252. doi: 10.7524/j.issn.0254-6108.2016.11.2016032201
引用本文: 花秀兵, 毛宇翔, 刘洪伟, 程柳, 史建波, 江桂斌. 小浪底水库鱼体和沉积物中汞稳定同位素组成特征[J]. 环境化学, 2016, 35(11): 2245-2252. doi: 10.7524/j.issn.0254-6108.2016.11.2016032201
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HUA Xiubing, MAO Yuxiang, LIU Hongwei, CHENG Liu, SHI Jianbo, JIANG Guibin. Characteristics of stable mercury isotopic compositions in fish and sediments from Xiaolangdi Reservoir[J]. Environmental Chemistry, 2016, 35(11): 2245-2252. doi: 10.7524/j.issn.0254-6108.2016.11.2016032201
Citation: HUA Xiubing, MAO Yuxiang, LIU Hongwei, CHENG Liu, SHI Jianbo, JIANG Guibin. Characteristics of stable mercury isotopic compositions in fish and sediments from Xiaolangdi Reservoir[J]. Environmental Chemistry, 2016, 35(11): 2245-2252. doi: 10.7524/j.issn.0254-6108.2016.11.2016032201
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小浪底水库鱼体和沉积物中汞稳定同位素组成特征

  • 1.

    河南理工大学资源环境学院, 焦作, 454000;

  • 2.

    中国科学院生态环境研究中心, 环境化学与生态毒理学国家重点实验室, 北京, 100085

  • 基金项目:

    国家973计划项目（2013CB430004）和国家自然科学基金（41422306，21120102040）资助.

Characteristics of stable mercury isotopic compositions in fish and sediments from Xiaolangdi Reservoir

  • 1.

    Institute of Resources and Environment, Henan Polytechnic University, Jiaozuo, 454000, China;

  • 2.

    State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China

  • Fund Project: Supported by the National Basic Research Program of China (2013CB430004) and the National Natural Science Foundation of China (41422306, 21120102040).

  • 摘要: 使用多接收器电感耦合等离子体质谱仪（MC-ICP-MS）测定了小浪底水库鱼体和沉积物中汞同位素的组成.结果显示，小浪底水库鱼体具有偏负的δ202Hg和偏正的Δ199Hg（δ202Hg：-0.26‰±0.30‰；Δ199Hg：0.79‰±0.08‰），而沉积物比鱼体具有更加偏负的δ202Hg和趋近于0值的Δ199Hg（δ202Hg：-1.48‰±0.38‰；Δ199Hg：0.01‰±0.02‰）.与以往的研究相比，小浪底水库鱼体内汞同位素特征与淡水水库区域鱼体中类似，而Δ199Hg/Δ201Hg的比值为1.22，表明小浪底水库鱼体内汞的非质量分馏主要是甲基汞的光化学降解产生的；沉积物的同位素特征表明其受到了人为源排放的影响.鱼体内δ15N数据表明在营养转移的过程中会发生质量分馏，但不会发生非质量分馏.
    Abstract: The isotopic compositions of mercury (Hg) in fish and sediment samples collected from the Xiaolangdi Reservoir, Henan province, were determined using multi-collector inductively coupled plasma mass spectrometry (MC-ICP-MS). Negative δ202Hg (-0.26‰±0.30‰) and positive Δ199Hg (0.79‰±0.08‰) observed in fish samples are similar to those in fish species from freshwater reservoirs reported in previous studies. The slope of Δ199Hg/Δ201Hg in fish was 1.22, indicating the mass independent fractionation in fish from the Xiaolangdi Reservoir subject to the photodegradation of monomethylmercury. Negative δ202Hg (-1.48‰±0.38‰) and near-zero Δ199Hg (0.01‰±0.02‰) in sediments indicate the influence of anthropogenic emission. The relationships between mercury isotopic compositions and δ15N in fish indicate that the mass-dependent fractionation occured during trophic transfer, while mass-independent fractionation was absent during this process.
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  • 收稿日期:  2016-03-22
  • 刊出日期:  2016-11-15

小浪底水库鱼体和沉积物中汞稳定同位素组成特征

  • 1.  河南理工大学资源环境学院, 焦作, 454000;
  • 2.  中国科学院生态环境研究中心, 环境化学与生态毒理学国家重点实验室, 北京, 100085
  • 收稿日期:  2016-03-22
基金项目:

国家973计划项目（2013CB430004）和国家自然科学基金（41422306，21120102040）资助.

摘要: 使用多接收器电感耦合等离子体质谱仪（MC-ICP-MS）测定了小浪底水库鱼体和沉积物中汞同位素的组成.结果显示，小浪底水库鱼体具有偏负的δ202Hg和偏正的Δ199Hg（δ202Hg：-0.26‰±0.30‰；Δ199Hg：0.79‰±0.08‰），而沉积物比鱼体具有更加偏负的δ202Hg和趋近于0值的Δ199Hg（δ202Hg：-1.48‰±0.38‰；Δ199Hg：0.01‰±0.02‰）.与以往的研究相比，小浪底水库鱼体内汞同位素特征与淡水水库区域鱼体中类似，而Δ199Hg/Δ201Hg的比值为1.22，表明小浪底水库鱼体内汞的非质量分馏主要是甲基汞的光化学降解产生的；沉积物的同位素特征表明其受到了人为源排放的影响.鱼体内δ15N数据表明在营养转移的过程中会发生质量分馏，但不会发生非质量分馏.

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