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首页> 外文期刊>Environmental Science & Technology >Mercury Isotope Signatures in Contaminated Sediments as a Tracer for Local Industrial Pollution Sources
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Mercury Isotope Signatures in Contaminated Sediments as a Tracer for Local Industrial Pollution Sources

机译：污染沉积物中的汞同位素特征作为局部工业污染源的示踪剂

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摘要

Mass-dependent fractionation (MDF) and mass-independent fractionation (MIF) may cause characteristic isotope signatures of different mercury (Hg) sources and help understand transformation processes at contaminated sites. Here, we present Hg isotope data of sediments collected near industrial pollution sources in Sweden contaminated with elemental liquid Hg (mainly chlor-alkali industry) or phenyl-Hg (paper industry). The sediments exhibited a wide range of total Hg concentrations from 0.86 to 99 μg g~(-1), consisting dominantly of organically-bound Hg and smaller amounts of sulfide-bound Hg. The three phenyl-Hg sites showed very similar Hg isotope signatures (MDF δ~(202)Hg: -0.2‰ to -0.5‰; MIF △~(199)Hg: -0.05‰ to -0.10‰). In contrast, the four sites contaminated with elemental Hg displayed much greater variations (δ~(202)Hg: -2.1‰ to 0.6‰; △~(199)Hg: -0.19‰ to 0.03‰) but with distinct ranges for the different sites. Sequential extractions revealed that sulfide-bound Hg was in some samples up to 1‰ heavier in δ~(202)Hg than organically-bound Hg. The selectivity of the sequential extraction was tested on standard materials prepared with enriched Hg isotopes, which also allowed assessing isotope exchange between different Hg pools. Our results demonstrate that different industrial pollution sources can be distinguished on the basis of Hg isotope signatures, which may additionally record fractionation processes between different Hg pools in the sediments.
机译：与质量有关的分级分离（MDF）和与质量无关的分级分离（MIF）可能会导致不同汞（Hg）源的特征同位素特征，并有助于了解受污染场所的转化过程。在这里，我们介绍了瑞典工业污染源附近收集的沉积物的汞同位素数据，这些污染源被元素液态汞（主要是氯碱工业）或苯基汞（造纸工业）污染。沉积物的总Hg浓度范围从0.86到99μgg〜（-1）很大，主要由有机结合的Hg和少量硫化物结合的Hg组成。三个苯基-Hg位点显示出非常相似的Hg同位素特征（MDFδ〜（202）Hg：-0.2‰至-0.5‰; MIF△〜（199）Hg：-0.05‰至-0.10‰）。相比之下，四个被元素汞污染的位点表现出更大的变化（δ〜（202）Hg：-2.1‰至0.6‰；△〜（199）Hg：-0.19‰至0.03‰），但不同点的范围不同网站。顺序萃取表明，某些样品中的硫化物结合的汞的δ〜（202）Hg含量比有机结合的汞高1‰。在用富汞同位素制备的标准材料上测试了连续萃取的选择性，这也可以评估不同汞库之间的同位素交换。我们的结果表明，可以根据汞同位素特征区分不同的工业污染源，这可以另外记录沉积物中不同汞池之间的分馏过程。

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  • 来源
    《Environmental Science & Technology》 |2015年第1期|177-185|共9页
  • 作者

    Jan G. Wiederhold; Ulf Skyllberg; Andreas Drott; Martin Jiskra; Sofi Jonsson; Erik Bjoern; Bernard Bourdon; Ruben Kretzschmar;

  • 作者单位

    Soil Chemistry Group, Institute of Biogeochemistry and Pollutant Dynamics, ETH Zurich, CH-8092 Zurich, Switzerland,Isotope Geochemistry Group, Institute of Geochemistry and Petrology, ETH Zurich, CH-8092 Zurich, Switzerland;

    Department of Forest Ecology and Management, Swedish University of Agricultural Sciences, SE-90187 Umea, Sweden;

    Department of Forest Ecology and Management, Swedish University of Agricultural Sciences, SE-90187 Umea, Sweden;

    Soil Chemistry Group, Institute of Biogeochemistry and Pollutant Dynamics, ETH Zurich, CH-8092 Zurich, Switzerland,Isotope Geochemistry Group, Institute of Geochemistry and Petrology, ETH Zurich, CH-8092 Zurich, Switzerland;

    Department of Chemistry, Umea University, SE-90187 Umea, Sweden;

    Department of Chemistry, Umea University, SE-90187 Umea, Sweden;

    Isotope Geochemistry Group, Institute of Geochemistry and Petrology, ETH Zurich, CH-8092 Zurich, Switzerland,Laboratoire de Geologie de Lyon, ENS Lyon, CNRS and UCBL, F-6936 Lyon, France;

    Soil Chemistry Group, Institute of Biogeochemistry and Pollutant Dynamics, ETH Zurich, CH-8092 Zurich, Switzerland;

  • 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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