贵阳市高雁城市生活垃圾卫生填埋场土壤Cd、Pb、Zn、Ni污染及评价研究

Evaluation of Soil Heavy Metal Pollution in Gaoyan Urban Domestic Garbage Sanitary Landfill Site of Guiyang City

为了解城市生活垃圾填埋场土壤环境质量状况,本文对贵阳市高雁城市生活垃圾卫生填埋场土壤重金属污染特征进行了研究。结果表明:该垃圾填埋场土壤重金属Cd、Pb、Zn、Ni的平均含量分别为13.67、49.72、1 025.44和122.96 mg/kg,均远高于土壤中的自然丰度。土壤重金属Cd、Pb、Zn、Ni污染主要来源于外源物质,其含量水平与垃圾组成和填埋量密切相关。该填埋场土壤质量对植物和环境具有潜在危害和污染。

In order to assess the environmental quality of soil in urban domestic garbage landfill site, the heavy metal pollution status in Gaoyan urban domestic garbage sanitary landfill site of Guiyang city was inves-tigated in the present work. The results showed that the average heavy metal content for Cd, Pb, Zn and Ni was 13.67 mg/kg, 49.72 mg/kg, 1 025.44 mg/kg and 122.96 mg/kg, respectively, which were far higher than that in the natural soil. The pollution of Cd, Pb, Zn and Ni in soil mainly ascribed to the exogenous substances, and the pollution levels were closely related to composition of waste and landfill volume. There-fore, landfill soil quality is potentially harmful to plants and environment.