摘要
采用《污染场地风险评估技术导则》中的评估方法,运用HERA软件对广州某电镀搬迁场地土壤中的重金属污染物进行人体健康风险评估。结果表明:①该场地土壤中铬(Cr6+)和镍的致癌风险指数分别为1.92×10–6、2.31×10–6,均超过其评估标准值1×10–6,表明其对人类有较高的致癌风险。②该场地土壤中铬(Cr3+)、镍、铜、银的非致癌危害熵分别为16.7、20.8、4.68、1.48,均高于其基准值1,表明该场地土壤中的铬(Cr3+)和镍有较高的非致癌危害,铜和银具有一定的非致癌危害。③根据评估结果,提出了加强治理防护工作、根据目标污染物含量和位置分布确定修复重点区域、防治污染物扩散等管理、修复与治理该场地的建议。
Health risk assessments of soil polluted by heavy metals were conducted at a relocated electroplating site in Guangzhou using HERA package according to the methods from ＂Guidelines for Risk Assessment of Contaminated Sites＂. The results showed that： ① the carcinogenic risk index of chromium（Cr^6＋） and nickel in soil at this site were 1.92×10^4 and 2.31 × 10^4 respectively, both higher than the regulated critical values of 1 ×10^-6, which suggested they had higher carcinogenic risk.② the non-carcinogenic hazard quotient of four kinds of heavy metals, namely, chromium（Cr^3＋）, nickel, copper, silver were 16.7, 20.8, 4.68, and 1.48 respectively, they all exceeded the base value of 1.These indicated that chromium（Cr^3＋） and nickel had higher level of non-carcinogenic hazard in soil, and copper and silver had non-carcinogenic hazard in certain degree.③According to the assessments results, we proposed a series of suggestions for the site management and restoration, such as how to determine the kernel repaired areas based on the content and distribution of pollutants, how to prevent these pollutants from spread, how to strengthen the protection and management of this site, and so on.
出处
《湖南农业大学学报（自然科学版）》
CAS
CSCD
北大核心
2014年第3期321-324,共4页
Journal of Hunan Agricultural University(Natural Sciences)
基金
国家环境保护公益性行业科研专项(201109024
201309003)
国家"863"计划项目(SQ2009AA06XK1482462)
关键词
电镀搬迁场地
土壤重金属污染
致癌风险指数
非致癌危害熵
relocated electroplating site
soil heavy metals pollution
carcinogenic risk index
quotient of non- carcinogenic hazard
