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首页> 外文期刊>Journal of Hazardous Materials >Grain size distribution of road-deposited sediment and its contribution to heavy metal pollution in urban runoff in Beijing, China
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Grain size distribution of road-deposited sediment and its contribution to heavy metal pollution in urban runoff in Beijing, China

机译：北京市区道路沉积物的粒径分布及其对重金属污染的影响

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摘要

Pollutant washoff from road-deposited sediment (RDS) is an increasing problem associated with the rapid urbanization of China that results in urban non-point source pollution. Here, we analyzed the RDS grain size distribution and its potential impact on heavy metal pollution in urban runoff from impervious surfaces of urban villages, colleges and residences, and main traffic roads in the Haidian District, Beijing, China. RDS with smaller grain size had a higher metal concentration. Specifically, particles with the smallest grain size (<44 μm) had the highest metal concentration in most areas (unit: mg/kg): Cd 0.28-1.31. Cr 57.9-154, Cu 68.1-142, Ni 25.8-78.0, Pb 73.1-222 and Zn 264-664. Particles with smaller grain size (<250 μm) contributed more than 80% of the total metal loads in RDS washoff, while suspended solids with a grain size <44 μm in runoff water accounted for greater than 70% of the metal mass in the total suspended solids (TSS). The heavy metal content in the TSS was 2.21-6.52% of that in the RDS. These findings will facilitate our understanding of the importance of RDS grain size distribution in heavy metal pollution caused by urban storm runoff.
机译：道路沉积物（RDS）中的污染物冲刷是与中国快速城市化有关的一个日益严重的问题，导致城市面源污染。在这里，我们分析了RDS的粒径分布及其对城市径流中重金属污染的潜在影响，这些径流来自城市村庄，大学和住宅的不透水表面以及北京市海淀区的主要交通道路。具有较小晶粒尺寸的RDS具有较高的金属浓度。具体而言，最小粒径（<44μm）的颗粒在大多数区域中具有最高的金属浓度（单位：mg / kg）：Cd 0.28-1.31。 Cr 57.9-154，Cu 68.1-142，Ni 25.8-78.0，Pb 73.1-222和Zn 264-664。粒径较小（<250μm）的颗粒在RDS冲洗中占金属总负载的80％以上，而径流水中粒径小于44μm的悬浮固体占金属总量的70％以上悬浮固体（TSS）。 TSS中的重金属含量为RDS中的重金属含量的2.21-6.52％。这些发现将有助于我们理解RDS粒度分布在城市暴雨径流引起的重金属污染中的重要性。

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  • 来源
    《Journal of Hazardous Materials》 |2010年第3期|p.203-210|共8页
  • 作者

    Hongtao Zhao; Xuyong Li; Xiaomei Wang; Di Tian;

  • 作者单位

    State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences. Chinese Academy of Sciences. Shuangqing Road 18. Beijing 100085, China;

    State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences. Chinese Academy of Sciences. Shuangqing Road 18. Beijing 100085, China;

    State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences. Chinese Academy of Sciences. Shuangqing Road 18. Beijing 100085, China;

    State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences. Chinese Academy of Sciences. Shuangqing Road 18. Beijing 100085, China;

  • 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);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    road-deposited sediment; grain size distribution; heavy metal loads; urban runoff; urban land use;

    机译：道路沉积物;粒度分布;重金属负荷;城市径流;城市土地利用;

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