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首页> 外文期刊>Environmental Science & Technology >Bioaccumulation of Methylmercury versus Inorganic Mercury in Rice (Oryza sativa L.) Grain
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Bioaccumulation of Methylmercury versus Inorganic Mercury in Rice (Oryza sativa L.) Grain

机译：水稻（Oryza sativa L.）谷物中甲基汞与无机汞的生物富集

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摘要

Mercury (Hg) bioaccumulation in aquatic food webs has been much studied, motivated from high Hg levels found in many fish species important for human consumption. Hg bioaccumulation in terrestrial food chains have received little attention and assumed to be of minor importance. However, recent studies showed that rice can be an important pathway of methylmercury (MeHg) exposure to inhabitants in Hg mining areas in China. In this study, 59 sampling sites (including 32 sites from "heavily polluted area", 19 from "less-impacted area" and 8 from "control sites") were selected in a Hg mining area in China and both inorganic Hg (IHg) and MeHg were determined in rice grain (brown rice) and soil samples to evaluate Hg bioaccumulation in rice grain. Bio-Accumulation Factors (BAFs) for IHg ranged from 0.00014 to 0.51 and from 0.71 to 50 for MeHg. BAFs for MeHg were on average more than 800 times higher than those for IHg (maximum: 40 000 times). This study, for the first time, showed that rice grain is an intensive bioaccumulator of MeHg, but not of IHg, which may be trapped by the roots.
机译：水生食物网中汞（Hg）生物富集的研究很多，其动机是在许多对人类食用很重要的鱼类中发现的高汞含量。陆地食物链中的汞生物富集很少受到关注，并被认为次要的。但是，最近的研究表明，水稻可能是中国汞矿区居民接触甲基汞（MeHg）的重要途径。在这项研究中，我们在中国的汞矿开采区选择了59个采样点（包括32个“重度污染区”，19个“影响较小区”和8个“对照区”）以及两种无机汞（IHg）测定稻谷（糙米）和土壤样品中的MeHg和MeHg，以评估稻谷中Hg的生物积累。 IHg的生物蓄积因子（BAF）范围为0.00014至0.51，MeHg的范围为0.71至50。 MeHg的BAF平均比IHg的BAF高800倍以上（最多：40 000倍）。这项研究首次表明，稻米是MeHg的强生物蓄积体，而不是IHg的强生物蓄积体，它可能被根部捕获。

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  • 来源
    《Environmental Science & Technology》 |2010年第12期|P.4499-4504|共6页
  • 作者

    HUA ZHANG; rnXINBIN FENG; THORJORN LARSSEN; rnLIHAI SHANG; PING LI;

  • 作者单位

    State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, 550002, China Graduate University of Chinese Academy of Sciences, Beijing, 100049, China;

    rnState Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, 550002, China;

    rnNorwegian Institute for Water Research (NIVA), Gaustadalleen 21, 0349 Oslo, Norway Department of Chemistry, University of Oslo, P.O. Box 1033, 0315 Oslo, Norway;

    rnState Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, 550002, China;

    rnState Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, 550002, China;

  • 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);
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  • 正文语种 eng
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