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首页> 外文期刊>Environmental Science & Technology >Post Gold King Mine Spill Investigation of Metal Stability in Water and Sediments of the Animas River Watershed
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Post Gold King Mine Spill Investigation of Metal Stability in Water and Sediments of the Animas River Watershed

机译:金王后矿井溢流调查阿尼马斯河流域水和沉积物中金属的稳定性

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摘要

We applied spectroscopy, microscopy, diffraction, and aqueous chemistry methods to investigate the persistence of metals in water and sediments from the Animas River 13 days after the Gold King Mine spill (August 5, 2015). The Upper Animas River watershed, located in San Juan Colorado, is heavily mineralized and impacted by acid mine drainage, with low pH water and elevated metal concentrations in sediments (108.4 ± 1.8 mg kg~(-1) Pb, 32.4 ± 0.5 mg kg~(-1) Cu, 729.6 ± 5.7 mg kg~(-1) Zn, and 51 314.6 ± 295.4 mg kg~(-1) Fe). Phosphate and nitrogen species were detected in water and sediment samples from Farmington, New Mexico, an intensive agricultural area downstream from the Animas River, while metal concentrations were low compared to those observed upstream. Solid-phase analyses of sediments suggest that Pb, Cu, and Zn are associated with metal-bearing jarosite and other minerals (e.g., clays, Fe-(oxy)hydroxldes). The solubility of jarosite at near-neutral pH and biogeochemical processes occurring downstream could affect the stability of metal-bearing minerals in river sediments. This study contributes relevant information about the association of metal mixtures in a heavy mineralized semiarid region, providing a foundation to better understand long-term metal release in a public and agricultural water supply.
机译:我们使用光谱学,显微镜,衍射和水化学方法研究了金王矿泄漏后13天(2015年8月5日)来自阿尼马斯河的水和沉积物中金属的持久性。位于科罗拉多州圣胡安市的上阿尼马斯河(Ananis River)流域,矿化程度很高,并受到酸性矿山排水的影响,pH值低的水和沉积物中的金属浓度升高(108.4±1.8 mg kg〜(-1)Pb,32.4±0.5 mg kg 〜(-1)铜,729.6±5.7 mg kg〜(-1)Zn和51 314.6±295.4 mg kg〜(-1)Fe)。在来自阿尼马斯河下游密集农业区的新墨西哥州法明顿的水和沉积物样品中检测到磷酸盐和氮物种,而与上游观察到的相比,金属浓度较低。沉积物的固相分析表明,Pb,Cu和Zn与含金属的黄钾铁矾和其他矿物质(例如粘土,Fe-(氧)羟基)相关。黄钾铁矾在接近中性pH的溶解度和下游发生的生物地球化学过程可能会影响河流沉积物中含金属矿物的稳定性。这项研究提供了有关重矿物半干旱地区金属混合物缔合的相关信息,为更好地了解公共和农业供水中的长期金属释放奠定了基础。

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  • 来源
    《Environmental Science & Technology》 |2016年第21期|11539-11548|共10页
  • 作者单位

    Department of Civil Engineering, MSC01 1070, University of New Mexico, Albuquerque, New Mexico 87131, United States;

    Department of Civil Engineering, MSC01 1070, University of New Mexico, Albuquerque, New Mexico 87131, United States;

    Department of Earth and Planetary Sciences, MSC03 2040, University of New Mexico, Albuquerque, New Mexico 87131, United States;

    New Mexico Environment Department, 121 Tijeras Avenue NE, Albuquerque, New Mexico 87102, United States;

    Community Environmental Health Program, MSC09 5360, University of New Mexico, Albuquerque, New Mexico 87131, United States;

    Department of Chemical and Biological Engineering, MSC01 1120, University of New Mexico, Albuquerque, New Mexico 87131, United States;

    Department of Civil and Environmental Engineering, The University of Iowa, 4105 Seamans Center, Iowa City, Iowa 52242, United States;

    Department of Chemical and Biological Engineering, MSC01 1120, University of New Mexico, Albuquerque, New Mexico 87131, United States;

    Community Environmental Health Program, MSC09 5360, University of New Mexico, Albuquerque, New Mexico 87131, United States;

    Department of Earth and Planetary Sciences, MSC03 2040, University of New Mexico, Albuquerque, New Mexico 87131, United States;

    Department of Earth and Planetary Sciences, MSC03 2040, University of New Mexico, Albuquerque, New Mexico 87131, United States;

    Department of Civil Engineering, MSC01 1070, University of New Mexico, Albuquerque, New Mexico 87131, United States;

  • 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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