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首页> 外文期刊>Journal of Environmental Science and Health. A, Toxic/Hazardous Substances & Environmental Engineering >Polychlorinated biphenyls in stormwater runoff entering the tidal Anacostia River, Washington, DC, through small urban catchments and combined sewer outfalls
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Polychlorinated biphenyls in stormwater runoff entering the tidal Anacostia River, Washington, DC, through small urban catchments and combined sewer outfalls

机译：雨水径流中的多氯联苯通过小型城市集水区和下水道排污口进入潮水的阿纳科斯蒂亚河，华盛顿特区

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摘要

To investigate the loadings, solid-water partitioning, transport dynamics, and sources of polychlorinated biphenyls (PCBs) in urban stormwater runoff entering into the lower tidal Anacostia River, which flows south of Washington, DC, USA, storm and base flow samples were collected in six branches. Stormwater runoff contained elevated levels of PCBs (9.82 to 211 ng/L) higher than base flow by up to 80-fold. The present study suggests that input of PCBs from Lower Beaverdam Creek is likely to be greater than those from the two major branches (Northeast and Northwest Branches) that were believed as primary source areas. PCBs in storm flow were significantly enriched in the particle phase, which accounted for more than 90% of the total PCBs. Particles were the primary vector transporting PCBs into the Anacostia River, suggesting that removal of particles in stormwater runoff using best management practices (BMPs) such as post treatment system likely decrease PCBs significantly. PCB congener patterns found in stormwater samples clearly explain stormwater runoff is a major transport pathway adding substantial amount of PCBs to the tidal Anacostia River.
机译：为了调查流入美国华盛顿特区以南的潮汐Anacostia河的城市雨水径流中的负荷，固水分配，运输动力学和多氯联苯（PCB）的来源，收集了暴雨和基流样本在六个分支中。雨水径流中的多氯联苯含量（从9.82至211 ng / L）比基础流量高出多达80倍。本研究表明，来自下比弗丹河的多氯联苯的输入可能要比被认为是主要来源地区的两个主要分支（东北和西北分支）的多。暴风雨中的PCB在颗粒相中明显富集，占PCB总数的90％以上。颗粒是将多氯联苯运入Anacostia河的主要载体，这表明使用后处理系统等最佳管理方法（BMP）去除雨水径流中的颗粒可能会大大减少多氯联苯。雨水样本中发现的多氯联苯同源物模式清楚地说明了雨水径流是增加大量多氯联苯到潮水阿纳科斯蒂亚河的主要运输途径。

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