江苏省典型生态示范区土壤中多环芳烃的含量与风险评价  

PAHs Content in Soils of Typical Ecological Demonstration Areas and Its Risk Assessment in Jiangsu Province

作　　者：张祥志[1] 赵永刚[1] 胡冠九[1] 章勇[1] 范迪富[2] 廖启林[2] 

机构地区：[1]江苏省环境监测中心,南京210036 [2]江苏省地质调查研究院,南京210018

出　　处：《土壤》2006年第6期790-793,共4页Soils

基　　金：国土资源部中国地质调查局与江苏省人民政府合作项目"江苏省国土生态地球化学调查"(20031230008和200312300009-03)资助

摘　　要：采集了江苏省某典型生态示范区内58个监测单元的土壤样品,并对样品中的多环芳烃(PAHs)进行了定量分析。结果表明,生态示范区土壤中的PAHs平均含量较低,但不同土壤样品之间PAHs的变异系数较大,以二苯[a,h]并蒽、苯并[a]蒽、苯并[b]荧蒽、苯并[k]荧蒽为主要组成成分。从8个生态类型区分析,工矿企业搬迁区PAHs含量最高,达49.196μg/kg,其次是化工区周边,农业科技园土壤中的PAHs含量最低。工业区的PAHs多来源于石油输入,而以农业为主的生产基地、科技园等,PAHs主要来源于化石燃料的不完全燃烧。生态风险评价结果显示生态示范区内的PAHs处于较低毒性水平,尚未对生物造成不利的影响。The contents of polycyclic aromatic hydrocarbons （PAHs） of 58 soil samples collected from 8 typical ecological demonstration areas in Jiangsu province were analyzed quantitatively. The results showed that the mean content of PAHs in the soils was relatively lower, but with a high variance coefficient. Dibenzo[a,h]anthrace, benz[a]anthracene, benzo[b]fluoranthene and benzo[b]fluoranthene were found to be the dominant components of PAHs. In the 8 typical ecological demonstration areas, the highest content of PAHs （49.196 μg/kg） was found in soils from the industry and mining removal areas, while the lowest content of PAHs in soils from the agricultural technological gardens. In industry areas the PAHs mainly come from petroleum input, while in agricultural product bases and science and technology gardens the PAHs mainly from inefficient combustion of fossil fuel. The ecological risk assessment indicated that the low toxicological level of PAHs in soils of the typical ecological demonstration areas, which did not produced the negative influence on organism.

关 键 词：生态示范区 土壤 多环芳烃 生态风险评价 

分 类 号：X131[环境科学与工程—环境科学]