Enrichments of Metals, Including Methylmercury, in Sewage Spills in South Carolina, USA.
Enrichments of Metals, Including Methylmercury, in Sewage Spills in South Carolina, USA.
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DOI：
10.2134/jeq2018.02.0067
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发表时间：
2018-09
影响因子：
2.4
通讯作者：
Rothenberg SE
中科院分区：
文献类型：
--
作者：
Emmons AM;Bizimis M;Lang SQ;Stangler W;Geidel G;Baalousha M;Wanamaker E;Rothenberg SE
接触微生物病原体是下水道溢出的主要问题;然而，污水溢出也可能是有毒金属的重要来源，包括甲基汞（MeHg）。2015年11月至2017年1月，在华金飓风之后，从美国南卡罗来纳州哥伦比亚的三条小溪中定期收集地表水样本。常规采样与六次污水泄漏同时进行。测量了总汞（THg）和甲基汞（未过滤和过滤）以及32种其他金属（过滤）。与地表水样本相比，污水泄漏中的总汞（未过滤和过滤）、甲基汞（未过滤）和19种其他金属显著更高（均为log 10转换）（双尾t检验，p<0.05，n=38-42）。毒性加权因子适用于18种金属，包括THG和甲基汞，直接从污水泄漏（n=3-4）和废水排放口（n=5）收集的样品。平均而言，污水是18.2和12.0倍以上的毒性为THG和甲基汞，分别为1.84倍以上的毒性为所有18种金属相比，从废水排放口处理的污水。结果表明，污水泄漏的无机汞，甲基汞，和其他金属的接收沃茨的来源，并可能导致水质损害。
Exposure to microbial pathogens is the primary concern of sanitary sewer overflows; however, sewage spills may also be a significant source of toxic metals, including methylmercury (MeHg). Between November 2015 and January 2017, following Hurricane Joaquin, surface water samples were collected routinely from three creeks in Columbia, South Carolina, USA. Routine sampling coincided with six sewage spills. Total mercury (THg) and MeHg (unfiltered and filtered), and 32 other metals (filtered) were measured. Compared to surface water samples, THg (unfiltered and filtered), MeHg (unfiltered), and 19 other metals were significantly higher in sewage spills (all log10-transformed) (two-tailed t-test, p<0.05 for all, n=38–42). Toxic weighting factors were applied to 18 metals, including THg and MeHg, in samples collected directly from sewage spills (n=3–4) and a wastewater outfall (n=5). On average, sewage was 18.2 and 12.0 times more toxic for THg and MeHg, respectively, and 1.84 times more toxic for all 18 metals, compared to treated effluent from the wastewater outfall. Results suggest sewage spills were a source of inorganic Hg, MeHg, and other metals to the receiving waters, and may potentially contribute to water quality impairments.
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3.9
作者：
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