垃圾填埋场土壤重金属污染特征及生态风险分析  

Pollution Characteristics and Ecological Risk Analysis of Heavy Metals in Soil of Landfill

作　　者：邓凯文[1] DENG Kaiwen(Beijing Institute of Geo-exploration Technology,Beijing 100120,China)

机构地区：[1]北京市地质勘察技术院,北京100120

出　　处：《中国资源综合利用》2021年第9期125-128,共4页China Resources Comprehensive Utilization

基　　金：北京市土壤地质环境监测网运行(PXM2020-158307-000001)。

摘　　要：本文以北京市某垃圾填埋场550件表层土壤样品为研究对象,分析研究区表层土壤重金属污染特征及生态风险。结果表明,研究区内土壤重金属内梅罗综合污染指数(P_(N))相对较低,总体环境相对安全,但在加密区有1件样品Pb含量超过建设用地土壤污染风险管制值第一类用地标准,应引起重视;研究区土壤潜在生态风险单项系数(E_(i))以轻微生态风险为主,加密区土壤Cd和Hg分别有0.2%和11.2%的样品呈极强生态风险,外围区Hg有4.0%的样品呈极强生态风险;研究区土壤潜在生态风险指数(RI)以轻微生态风险为主,加密区有16.2%的样品呈强生态风险及以上等级,外围区有零星样品呈强生态风险及以上等级。因此,加密区内填埋的生活垃圾对研究区内土壤影响明显大于外围区,应当加强监测。Taking 550 surface soil samples from a landfill in Beijing as the research object,this paper analyzes the characteristics of heavy metal pollution and ecological risks in the surface soil of the study area.The results show that the Nemero comprehensive pollution index(P_(N))of heavy metals in the study area is relatively low,and the overall environment is relatively safe,however,there is a sample with Pb content in the dense area that exceeds the first-class land use standard of the soil pollution risk control value for construction land,which should be paid attention to;the individual coefficients of potential ecological risks(E_(i))of soil in the study area are dominated by minor ecological risks,0.2%and 11.2%of samples of soil Cd and Hg in the dense area respectively present a strong ecological risk,and 4.0%of the samples of Hg in the peripheral area present a strong ecological risk;the potential ecological risk index(RI)of soil in the study area is mainly based on slight ecological risk,16.2%of the samples in the encrypted area are of strong ecological risk and above,and there are sporadic samples in the outer area that are of strong ecological risk and above.Therefore,the impact of domestic waste landfilled in the dense area on the soil in the study area is significantly greater than that in the outer area,and monitoring should be strengthened.

关 键 词：垃圾填埋场 土壤重金属 潜在生态风险 评价 

分 类 号：X53[环境科学与工程—环境工程]