【摘要】 以山东省某城市近郊生活垃圾堆场为研究对象,采集堆场内和边界共21个土壤和地下水样品,通过与不同基准值(背景值)的比较,探析环境介质中13种重金属的含量分布特征,并就成人和儿童在不同暴露途径下的重金属致癌和非致癌健康风险进行评价.结果表明,堆场土壤和地下水中检出重金属的平均含量顺序分别为:Zn>Cr>Ni>Cu>Pb>As>Hg和Cr>Ni>Zn>Cu,致癌总风险和对成人的非致癌总风险均在可接受的范围内,但对儿童的非致癌总风险超过了安全阈值.产生不利健康风险的重金属主要是As、Cr,主导暴露途径为土壤摄食.更多还原

【Abstract】 This investigation focused on the characteristics and health risk assessment of heavy metals in the soil and groundwater of an open dumping site in inner suburbs in Shandong Province.Totally 17 soil samples and 4 groundwater samples were collected from the site. The concentration distribution of 13 heavy metals was studied based on the limitation of corresponding criteria and background values. Health risk assessment for children and adults was carried out using the risk models. The results showed that the concentration of the heavy metals in soil and groundwater followed the order: Zn > Cr > Ni > Cu > Pb > As > Hg,Cr > Ni > Zn > Cu,respectively. Both the carcinogenic and non-carcinogenic risk for adults are acceptable,while the non-carcinogenic risk for children exceeds the safety threshold. The adverse health risks are mainly from As and Cr,and the main exposure pathway is soil ingestion.更多还原