Elevated Arsenic and Uranium Concentrations in Unregulated Water Sources on the Navajo Nation, USA.
Elevated Arsenic and Uranium Concentrations in Unregulated Water Sources on the Navajo Nation, USA.
复制标题
DOI：
10.1007/s12403-016-0226-6
复制
发表时间：
2017
影响因子：
6.7
通讯作者：
Lewis J
中科院分区：
文献类型：
--
作者：
Hoover J;Gonzales M;Shuey C;Barney Y;Lewis J
区域水污染和使用不受管制的水源可能是一个重要的混合金属暴露途径的农村人口位于地区与有限的水基础设施和广泛的采矿history.Using审查数据分析和绘图技术，我们分析了砷和铀的联合地理空间分布在整个纳瓦霍民族不受管制的水源，在美国西南部的农村地区，有500多个废弃的铀矿点。结果表明，15.1%（砷）和12.8%（铀）的检测水源中砷和铀浓度超过国家饮用水标准。邻近的不受管制的来源（即，与距离较远的来源相比，在6公里以内的废弃铀矿中发现的砷或铀浓度要高得多。所展示的潜在共同接触这些化学品的区域趋势对公共政策和未来的研究具有影响。具体而言，为了制定解决方案，减少农村地区不受管制来源的水污染对人类的影响，同时接触砷和铀的可能性需要扩大文件和检查。还提供了与现有健康暴露和风险降低战略文件有关的优先政策和研究决定的建议。
Regional water pollution and use of unregulated water sources can be an important mixed metals exposure pathway for rural populations located in areas with limited water infrastructure and an extensive mining history. Using censored data analysis and mapping techniques we analyzed the joint geospatial distribution of arsenic and uranium in unregulated water sources throughout the Navajo Nation, where over 500 abandoned uranium mine sites are located in the rural southwestern United States. Results indicated that arsenic and uranium concentrations exceeded national drinking water standards in 15.1 % (arsenic) and 12.8 % (uranium) of tested water sources. Unregulated sources in close proximity (i.e., within 6 km) to abandoned uranium mines yielded significantly higher concentrations of arsenic or uranium than more distant sources. The demonstrated regional trends for potential co-exposure to these chemicals have implications for public policy and future research. Specifically, to generate solutions that reduce human exposure to water pollution from unregulated sources in rural areas, the potential for co-exposure to arsenic and uranium requires expanded documentation and examination. Recommendations for prioritizing policy and research decisions related to the documentation of existing health exposures and risk reduction strategies are also provided.