徐州某老旧生活垃圾填埋场有机污染物研究

On Organic Pollutants in an Old Garbage Landfill in Xuzhou

为探究垃圾填埋场中有机污染物对周边地下水和土壤的影响,以徐州市某老旧生活垃圾填埋场为研究对象,对其特征有机污染物的分布和风险进行研究.结果显示地下水中主要有机污染物为三氯甲烷、四氯化碳、甲苯.在MJ10、MJ11、MJ12点,四氯化碳处于中等污染和重污染,单项污染指数和内梅罗综合指数评价显示其三氯甲烷和四氯化碳可能会对居民造成致癌风险.周边土壤中共检出9项有机污染物,其浓度都较低,垂直方向分布无显著差异,风险评价也表明其特征有机污染物远远低于标准值,对人体健康影响较小.垃圾填埋场对周边地下水和土壤中有机污染影响较小,仅个别地下水中有机污染物存在潜在污染风险,未来需要加强对地下水监测.

Leachate produced from landfills contaminates the surrounding environment.This paper monitored distribution of organic pollutants in soil and groundwater and assessed its environmental risk in an old garbage landfill in Xuzhou.The results show that the main organic pollutants are chloroform,carbon tetrachloride and toluene in the groundwater around the landfill site.CCl 4 were moderate and severe pollution at MJ10,MJ11 and MJ12 sites,and evaluation results of single pollution index and Nemello comprehensive index showed that CCl 4 and CHCl 3 may pose a risk of exposure to nearby residents.A total of 9 organic pollutants were detected in the surrounding soil,and their concentrations were all low,with no significant difference in vertical distribution.Risk assessment also showed that their characteristic organic pollutants were far below the standard value and had little impact on human health.To sum up,landfill has little impact on organic pollution in surrounding groundwater and soil,and only some organic pollutants in groundwater have potential pollution risks,which should be monitored seriously in future.