锑污染土壤环境风险评价研究

综合《场地环境评价导则》与美国超级基金法案的风险评价导则中环境风险评价的方法和要求,以武汉某化工厂污染场地为例,探讨土壤中锑的环境风险评价方法;并从人体健康评价与生态风险评价出发,就经口摄入、皮肤接触、呼吸吸入锑污染物对成人和儿童进行健康风险定量计算,并评价锑污染物的生态风险。结果表明:该废弃场地内污染土壤虽然不属于危险废物,土壤中有机物和大部分重金属含量均处于相应标准限制以下,但部分区域锑含量偏高,最高质量分数达到1262.7×10^-6,66%的土壤样品锑质量分数大于推荐修复值26×10^-6;污染土壤的非致癌风险非常大;污染土壤对生物具有一定的生态毒理学影响,场地土壤须进行修复后才能使用。

Environmental Risk Assessment of Antimony Contaminated Soil

Based on the method and requirement of environmental risk assessment in Guidelines for Site Environmental Assessment and the guidelines for risk assessment of USA superfund act, contaminated site of certain chemical plant in Wuhan was taken as an example, the method of environmental risk assessment of antimony in soil was discussed; ecological risks of antimony contamination and health risks for children and adults with the exposure pathways of oral ingestion, dermal contact and breath inhalation, were calculated by the means of human health and ecological risk assessments. The results showed that the contaminated soil was not hazardous waste, and contents of organic contaminant and most heavy metals were lower than the corresponding criterion, but content of antimony in part was higher, the most mass fraction was 1 262.7×10^-6, and the mass fractions of antimony for 66% of soil samples were higher than the recommended fixed value(26×10^-6); non-carcinogenic risk of contaminated soil was very high; there were some ecological and toxicological effects on organism for contaminated soil, and the land could be re-used after soil mediation.