沈抚新城不同土地利用类型多环芳烃含量、来源及人体健康风险评价  

Concentration,Sources and Ecological Risks of PAHs of Different Land Use Types in Shenfu New City

作　　者：王静[1,2] 刘明丽 张士超[1,2] 鲁垠涛[1,2] 姚宏[1,2] 

机构地区：[1]北京交通大学土木建筑工程学院,北京100044 [2]水中典型污染物控制与水质保障北京重点实验室,北京100044

出　　处：《环境科学》2017年第2期703-710,共8页Environmental Science

基　　金：国家水体污染控制与治理科技重大专项(2014ZX07202)

摘　　要：研究了处于城镇化进程中沈抚新城表层土壤多环芳烃的污染水平.从沈抚新城采集了54个土壤表层样品,包括4种不同土地利用类型(城镇用地、农村用地、林地、耕地),分析了不同土地利用类型中多环芳烃的含量,利用特征比值法与主成分分析对其进行来源分析,利用Ba P毒性当量含量及终生癌症风险增量模型(ILCR)对不同土地利用类型表层土壤内PAHs进行风险评价.城镇用地、耕地、农村用地、林地这4种土地利用类型ΣPAHs的含量分别为184~18 276、230~14 102、151~3 205、303~2 980μg·kg-1.不同土地利用类型土壤中PAHs来源相似,主要以煤燃烧源与交通源为主;风险评价表明沈抚地区存在潜在的健康风险,尤其是城镇用地风险水平最高,且最易通过皮肤接触途径暴露于土壤PAHs中.The concentration level of polycyclic aromatic hydrocarbon （PAHs） in topsoil from Shenfu New City in urbanization was studied. 54 topsoil samples were collected from Shenfu New City and 4 different land uses （ urban land, rural land, forest land, cultivated land） were included. The concentration of PAHs in different land uses was analyzed, the sources of soil PAHs were analyzed by using diagnostic ratios and principal component analysis, and the ecological risks were calculated using toxic equivalency concentrations of BaP and the incremental lifetime cancer risk（ILCR）model. Results indicated that the concentrations of ∑PAHs in urban land, cultivated land, rural land and forest land were in the range of 184-18 276, 230-14 102, 151-3 205, 303-2 980 μg·kg ^- 1 , respectively. Four land uses had similar sources, the main sources were coal combustion and traffic emission. According to the calculation of ecological risks, there were potential health risks for residents in Shenfu New City, especially urban land, meanwhile, residents were easily exposed to soil PAHs through dermal contact.

关 键 词：多环芳烃 土地利用类型 土壤 来源 风险评价 

分 类 号：X53[环境科学与工程—环境工程] X820.4