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首页> 外文期刊>Environmental Science & Technology >Hg Speciation and Stable Isotope Signatures in Human Hair As a Tracer for Dietary and Occupational Exposure to Mercury
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Hg Speciation and Stable Isotope Signatures in Human Hair As a Tracer for Dietary and Occupational Exposure to Mercury

机译：汞形态和人类头发中稳定的同位素特征作为饮食中和职业性汞暴露的示踪剂

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摘要

Exposure of humans and wildlife to various inorganic and organometallic forms of mercury (Hg) may induce adverse health effects. While human populations in developed countries are mainly exposed to marine fish monomethyhnercury (MMHg), this is not necessarily the case for developing countries and diverse indigenous people. Identification of Hg exposure sources from biomonitor media such as urine or hair would be useful in combating exposure. Here we report on the Hg stable isotope signatures and Hg speciation in human hair across different gold miner, indigenous and urban populations in Bolivia and France. We found evidence for both mass-dependent isotope fractionation (MDF) and mass-independent isotope fractionabon (MIF) in all hair samples. Three limiting cases of dominant exposure to inorganic Hg (IHg), freshwater fish MMHg, and marine fish MMHg sources are used to define approximate Hg isotope source signatures. Knowing the source signatures, we then estimated Hg exposure sources for the Bolivian gold miner populations. Modeled IHg levels in hair correspond well to measured IHg concentrations (R = 0.9), demonstrating that IHg exposure sources to gold miners can be monitored in hair samples following either its chemical speciation or isotopic composition. Different MMHg and inorganic exposure levels among gold miners appear to correspond to Irving and working conditions, including proximity to small towns, and artisanal vs large scale mining activity.
机译：人类和野生生物接触各种无机和有机金属形式的汞（Hg）可能会导致不良的健康影响。尽管发达国家的人口主要暴露于海水鱼类的甲基汞中，但发展中国家和土著人民却不一定如此。从生物监测介质（例如尿液或头发）中识别出汞暴露源将有助于抵抗暴露。在这里，我们报告了玻利维亚和法国不同金矿开采者，土著居民和城市居民中人发中的汞稳定同位素特征和汞形态。我们在所有头发样品中都发现了质量相关同位素分级分离（MDF）和质量无关同位素分级分离（MIF）的证据。三种主要暴露于无机汞（IHg），淡水鱼MMHg和海鱼MMHg源的极限情况用于定义近似的Hg同位素源特征。知道了来源特征后，我们便估算了玻利维亚金矿开采人群的汞暴露来源。头发中模型化的IHg水平与测得的IHg浓度非常吻合（R = 0.9），表明可以根据其化学形态或同位素组成，对头发样本中的IHg暴露于金矿的来源进行监测。金矿商之间不同的MMHg和无机暴露水平似乎与Irving和工作条件相对应，包括邻近小城镇以及手工与大规模采矿活动。

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  • 来源
    《Environmental Science & Technology》 |2011年第23期|p.9910-9916|共7页
  • 作者

    Laure Laffont; Meroen E. Sonke; Laurence Maurice; Selma Luna Monrroy; Jaime Chincheros; David Amouroux; Philippe Behra;

  • 作者单位

    Observatoire Midi-Pyrenees, Laboratoire de Geosciences Environnement Toulouse, Universite Paul Sabatier Toulouse III, 14 avenue Edouard Belin, 31400 Toulouse, France,LCA (Laboratoire de Chimie Agrolndustrielle), INPT, Universite de Toulouse, ENSIACET, 4 allee Emile Monso, F-31030 Toulouse Cedex 4, France,LCA (Laboratoire de Chimie Agrolndustrielle), INRA, F-31030 Toulouse Cedex 4, France;

    Observatoire Midi-Pyrenees, Laboratoire de Geosciences Environnement Toulouse, Universite Paul Sabatier Toulouse III, 14 avenue Edouard Belin, 31400 Toulouse, France,GET, CNRS, F-31400 Toulouse, France;

    Observatoire Midi-Pyrenees, Laboratoire de Geosciences Environnement Toulouse, Universite Paul Sabatier Toulouse III, 14 avenue Edouard Belin, 31400 Toulouse, France,GET, IRD, F-31400 Toulouse, France;

    Laboratorio de Calidad Ambiental, Instituto de Ecologfa, Universidad Mayor de San Andres (UMSA), Cota Cota Calle 27, La Paz, Bolivia;

    Laboratorio de Calidad Ambiental, Instituto de Ecologfa, Universidad Mayor de San Andres (UMSA), Cota Cota Calle 27, La Paz, Bolivia;

    LCABIE-IPREM UMR 5254, CNRS, Universite de Pau et des Pays de l'Adour, Helioparc Pau Pyrenees 2, Avenue Pierre Angot, F-64053 PAU Cedex 9, France;

    LCA (Laboratoire de Chimie Agrolndustrielle), INPT, Universite de Toulouse, ENSIACET, 4 allee Emile Monso, F-31030 Toulouse Cedex 4, France,LCA (Laboratoire de Chimie Agrolndustrielle), INRA, F-31030 Toulouse Cedex 4, France;

  • 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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