北京城区道路沉积物污染特性
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中国科学院生态环境研究中心城市与区域生态国家重点实验室 北京 100085,中国科学院生态环境研究中心城市与区域生态国家重点实验室 北京 100085,中国科学院生态环境研究中心城市与区域生态国家重点实验室 北京 100085,中国科学院生态环境研究中心城市与区域生态国家重点实验室 北京 100085

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国家自然科学基金项目(41030744,41230633,40901265)


The pollution characteristics of Beijing urban road sediments
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State key Laboratory of Urban and Regional Ecology,Research Center for Eco-environmental Sciences,Chinese Academy of Sciences,State key Laboratory of Urban and Regional Ecology,Research Center for Eco-environmental Sciences,Chinese Academy of Sciences,State key Laboratory of Urban and Regional Ecology,Research Center for Eco-environmental Sciences,Chinese Academy of Sciences,State key Laboratory of Urban and Regional Ecology,Research Center for Eco-environmental Sciences,Chinese Academy of Sciences

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    摘要:

    为了解城市道路沉积物污染物的浓度水平及可能造成的生态环境危害,在北京城区的生活区、文教区、交通干线和公园绿地这四种功能区的道路沉积物进行了取样监测,并分析了道路沉积物中总氮(TN)、总磷(TP)、重金属铜(Cu)、铬(Cr)、铅(Pb)、锌(Zn)和有机质(TOC)的污染特性。研究结果表明,各类功能区道路沉积物中TN、TP和TOC的含量较高。交通干线、文教区、生活区和公园绿地道路沉积物TN均值分别为0.1009、0.1440、0.1071、0.0974mg/kg,文教区道路沉积物的TN显著高于其他类型道路沉积物;TP均值分别为0.0695、0.0729、0.0665、0.0608mg/kg,以文教区最高,但未达显著水平。交通干线和文教区道路沉积物TOC浓度显著高于生活区和公园绿地,交通干线、文教区和生活区道路沉积物重金属的含量高于公园绿地。主要原因可能是人类活动和车辆交通量的影响。四类功能区氮主要以可溶态赋存,磷主要以颗粒态赋存在沉积物中,并且交通干线道路沉积物中溶解态磷比例最低。溶解态的重金属占总量的比例均较低,只有溶解态Cu达到5%以上,表明重金属主要赋存在颗粒态存在的沉积物中。道路沉积物或者外界带入的固体物质是地表径流污染物的重要来源,研究结果为城市地表污染控制提供重要参考。

    Abstract:

    In order to understand the urban road sediment pollutants concentration levels and possible ecological environmental hazards, urban road sediment samples were monitored and analyzed from four different functional areas including the living areas, the educational areas, the traffic routes and the green parks in the city of Beijing.Total nitrogen (TN), total phosphorus (TP), heavy metals and organic matter (TOC) in the road sediments were tested in order to get the pollutant characteristics. The research results show that high levels of TN, TP, and TOC are found in all types of road sediments. TN concentration in the road sediments in the living areas, the educational areas, the traffic routes and the green parks are 0.1009、0.1440、0.1071、0.0974mg/kg, respectively, which is significantly the most highest in the educational areas. TP concentration in the four areas are 0.0695、0.0729、0.0665、0.0608mg/kg, respectively, which is the most highest in the educational areas but not reach a significant level. Concentrations of TOC in sediments in the traffic routes and educational areas are found significantly higher than that in the living areas and the green parks. And heavy in the traffic routes, educational areas and the living areas are found much higher than that in the green parks. Human activities and traffic vehicles may be the main dominent factors. Dissolved nitrogen is the main form of nitrogen in the four fonction areas, but phosphorus is mainly in particles,and this is most significant in sediments in the traffic routes. Dissolved heavy metal content is low overall, and only dissolved Cu accounts above 5 percent in the total ammount. This indicates heavy metals are mainly in particles. Road sediments or outside solid substances are the important source of surface runoff pollutants. The findings of the paper provide important reference for the urban surface pollution control.

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任玉芬,王效科,欧阳志云,王巧环,侯培强.北京城区道路沉积物污染特性.生态学报,2013,33(8):2365~2371

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