Trace metal levels in sediments deposited in urban stormwater management facilities.
Trace metal levels in sediments deposited in urban stormwater management facilities.
复制标题
城市雨水管理设施沉积物中的微量金属含量。
DOI：
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发表时间：
2006
影响因子：
2.7
通讯作者：
B. Anderson
中科院分区：
文献类型：
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作者：
J. Marsalek;W. E. Watt;B. Anderson
描述了从雨水最佳管理实践(BMP)设施中回收的固体的金属化学特征，这些设施包括雨水池、人工湿地、渗滤池、生物滤池、雨水处理澄清池和三室油砂分离器。报告的BMP沉积物中痕量金属浓度是根据安大略省沉积物质量指南进行评估的。所有样品中有80%至100%受到Cd、Cr、Cu、Fe、Pb、Mn、Ni和Zn的轻微至中度污染。在所研究的几个设施中，发现沉积物中的铬(122微克/克)、铜(151和196微克/克)、锰(1,259和1,433微克/克)和锌(1,116微克/克)污染严重，文献中报告的某些油和颗粒分离器的金属含量甚至更高。就个别BMP而言，油类和砂砾分离器的沉淀物(含Cd、Cr、铜、铅和锌)、雨水澄清池淤泥(含铜、锰和锌)、生物滤池(含铜和锰)、工业区雨水池(仅含铜)和商业/住宅池(仅含铬)的沉积物污染严重。最后，池塘沉积物的化学污染引发了一些研究设施的毒性测试，并在几个地点证实了沉积物的毒性。
Characteristics of solids recovered from stormwater best management practice (BMP) facilities, including stormwater ponds, constructed wetlands, an infiltration basin, a biofilter, a stormwater treatment clarifier, and three-chamber oil and grit separators were described with respect to their metal chemistry. The reported trace metal concentrations in BMP sediments were assessed against the Ontario Sediment Quality Guidelines. Between 80 to 100% of all samples were marginally-to-intermediately polluted by Cd, Cr, Cu, Fe, Pb, Mn, Ni and Zn. Severe pollution of sediments was noted for Cr (122 microg/g), Cu (151 and 196 microg/g), Mn (1,259 and 1,433 microg/g), and Zn (1,116 microg/g), at several facilities studied, and even higher levels of metals were reported in the literature for certain oil and grit separators. With respect to individual BMPs, the severe pollution was found in sediments from oil and grit separators (for Cd, Cr, Cu, Pb and Zn), the stormwater clarifier sludge (Cu, Mn and Zn), a biofilter (Cu and Mn), an industrial area stormwater pond (Cu only), and a commercial/residential pond (Cr only). Finally, the chemical pollution of pond sediment triggered toxicity testing at some of the facilities studied, and sediment toxicity was confirmed at several sites.