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首页> 外文期刊>Environmental Science & Technology >Origin and Dynamics of Rare Earth Elements during Flood Events in Contaminated River Basins: Sr-Nd-Pb Isotopic Evidence
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Origin and Dynamics of Rare Earth Elements during Flood Events in Contaminated River Basins: Sr-Nd-Pb Isotopic Evidence

机译：受污染流域洪水事件中稀土元素的起源和动力学：Sr-Nd-Pb同位素证据

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摘要

In order to precisely quantify the contribution of anthropogenic activities and geogenic sources to the dissolved and suspended loads of rivers we have combined for the first time Rare Earth Element (REE) concentrations with Sr-Nd-Pb isotope ratios. We observed enrichments in Anthropogenic Rare Earth Elements (AREE) for dissolved (Gd) and suspended (Ce and Nd) loads of river water. During flood events, AREE anomalies progressively disappeared and gave way to the geogenic chemical signature of the basin in both dissolved and suspended loads. The isotopic data confirm these observations and shed new light on the trace elements sources. On the one hand, dissolved loads have peculiar isotopic characteristics and carry mainly limestone-derived and anthropogenic Sr and Nd as well as significant amounts of anthropogenic Pb. On the other hand, the results clearly indicate that anthropogenic contributions impact the suspended loads in all hydrological conditions. This study demonstrates that anthropogenic contributions to the river may change not only Pb but also Sr and Nd isotopic compositions in both dissolved and suspended loads. This is of importance for future provenance studies.
机译：为了精确量化人为活动和地源对河流溶解和悬浮负荷的贡献，我们首次将稀土元素（REE）浓度与Sr-Nd-Pb同位素比值相结合。我们观察到人为稀土元素（AREE）富集了溶解的（Gd）和悬浮的（Ce和Nd）河流水。在洪水事件中，AREE异常逐渐消失，并在溶解和悬浮载荷下都被盆地的地质化学特征所取代。同位素数据证实了这些观察结果，并为痕量元素来源提供了新的思路。一方面，溶解的负荷具有独特的同位素特征，并且主要携带石灰石衍生的和人为的Sr和Nd以及大量的人为的Pb。另一方面，结果清楚地表明，在所有水文条件下，人为因素影响悬浮负荷。这项研究表明，对人为河流的贡献不仅可以改变铅的含量，还可以改变溶解和悬浮负荷下的Sr和Nd同位素组成。这对于将来的来源研究很重要。

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  • 来源
    《Environmental Science & Technology》 |2016年第9期|4624-4631|共8页
  • 作者

    Christophe Hissler; Peter Stille; Jean Francois Iffly; Cedric Guignard; Francois Chabaux; Laurent Pfister;

  • 作者单位

    CAT/WATER/ERIN/LIST, 41 rue du Brill, 4422 Belvaux, Luxembourg;

    LHyGeS - UMR 7517 CNRS - EOST/UdS, 1 rue Blessig, 67084 Strasbourg Cedex, France;

    CAT/WATER/ERIN/LIST, 41 rue du Brill, 4422 Belvaux, Luxembourg;

    CAT/WATER/ERIN/LIST, 41 rue du Brill, 4422 Belvaux, Luxembourg;

    LHyGeS - UMR 7517 CNRS - EOST/UdS, 1 rue Blessig, 67084 Strasbourg Cedex, France;

    CAT/WATER/ERIN/LIST, 41 rue du Brill, 4422 Belvaux, Luxembourg;

  • 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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