非正规垃圾填埋场土壤重金属分布特征与污染评价  

Distribution Characteristics and Pollution Assessment of Soil Heavy Metals in Informal Landfill

作　　者：郑吉 王丽晓 陈胤再 傅瑜 ZHENG Ji;WANG Li-xiao;CHEN Yin-zai;FU Yu(Ningbo Research Institute of Ecological&Environmental Sciences,Ningbo,Zhejiang 315012,China)

机构地区：[1]宁波市生态环境科学研究院,浙江宁波315012

出　　处：《四川环境》2023年第4期239-243,共5页Sichuan Environment

摘　　要：非正规垃圾填埋场由于缺乏有效的污染防治措施,更容易受到重金属污染。以某非正规垃圾填埋场为例,对停运后第1年和第4年土壤9项重金属含量进行检测,并通过单因子污染指数、综合污染指数、内梅罗污染指数和地积累指数等指标对其进行污染评价。结果表明,场地内底部土壤受到渗滤液下渗影响,重金属含量高于场地周边土壤样品,且与垃圾直接接触的表层土壤锑、镍含量最高。停运第4年场地内底部原状土锑、镍两种重金属含量是停运第1年的3.59和2.55倍。仅场地中央点位在停运后第4年存在污染,早期填埋及填埋量较大区域随着填埋时间的变化,土壤污染程度加剧最为明显。该研究结论可为非正规垃圾填埋场环境管理和后期整治工作提供技术参考。Due to the lack of effective pollution control measures,soil in informal landfill sites is threaten by heavy metal pollution.Taking an informal landfill site as an example,this paper detected the contents of 9 heavy metals in soil of an informal landfill site in the 1st and 4th year after the closure of operation,and evaluated by single factor pollution index,comprehensive pollution index,Nemero pollution index and geo-accumulation index.The results showed that the bottom soil of the site was affected by the infiltration of leachate,the heavy metal content was higher than that of the soil samples around the site,and the surface soil in direct contact with the garbage had the highest content of antimony and nickel.In the 4th year after the closure of operation,the concentrations of antimony and nickel in the undisturbed soil at the bottom of the site was 3.59 and 2.55 times of that in the first year of closure,respectively.Only the central site was polluted in the 4th year after the closure of operation.and the soil pollution in the early landfill and the area with a large amount of landfill increased most obviously with the change of landfill time.Overall,the results can provide technical reference for environmental management and later remediation of informal landfill sites.

关 键 词：非正规填埋场 重金属 土壤 分布特征 污染评价 

分 类 号：X53[环境科学与工程—环境工程]