Jiang Yu-Feng, Wang Xue-Tong, Wang Fei, Jia Ying, Wu Ming-Hong, Sheng Guo-Ying, Fu Jia-Mo
Institute of Environmental Pollution and Health, School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, China.
Chemosphere. 2009 May;75(8):1112-8. doi: 10.1016/j.chemosphere.2009.01.027. Epub 2009 Feb 7.
Levels, composition profiles and sources of polycyclic aromatic hydrocarbons (PAHs) were analyzed in 55 surface soil samples collected from Shanghai urban districts. The total concentrations of 22 PAHs (SigmaPAHs) ranged from 442 to 19,700 microgkg(-1), with a mean of 3780 microgkg(-1), and the sum of 16 priority PAHs (Sigma16PAHs) varied from 347 to 17,900 microgkg(-1), with a mean of 3290 microgkg(-1), and the seven possible carcinogenic PAHs (Sigma7CarPAHs) accounted for 36-58% of Sigma16PAHs. Among different functional areas, the higher level of PAHs was found in the roadside, followed by greenbelt, commercial district, park, and residential district. The composition of PAHs was characterized by the high molecular weight PAHs, among which fluoranthene, pyrene, benzo[b]fluoranthene and chrysene were most dominant components. A correlation analysis showed that there was relatively good correlation among the individual PAHs, but the contents of PAHs were poorly correlated with soil total organic carbon (TOC). A principal component analysis and PAHs isomeric ratios indicate that PAHs in Shanghai urban soil mainly originated from combustion. The toxic assessment suggested that soil PAHs exposure is medium carcinogenic at present level.
对采自上海市区的55个表层土壤样品中的多环芳烃（PAHs）含量、组成特征及来源进行了分析。22种PAHs的总浓度（ΣPAHs）范围为442至19700μgkg⁻¹，平均值为3780μgkg⁻¹；16种优先控制PAHs的总和（Σ16PAHs）在347至17900μgkg⁻¹之间，平均值为3290μgkg⁻¹；7种可能致癌的PAHs（Σ7CarPAHs）占Σ16PAHs的36 - 58%。在不同功能区中，路边的PAHs含量较高，其次是绿化带、商业区、公园和居民区。PAHs的组成以高分子量PAHs为特征，其中荧蒽、芘、苯并[b]荧蒽和 Chrysene是最主要的成分。相关性分析表明，各PAHs之间相关性较好，但PAHs含量与土壤总有机碳（TOC）相关性较差。主成分分析和PAHs异构体比值表明，上海城市土壤中的PAHs主要来源于燃烧。毒性评估表明，目前土壤PAHs暴露具有中等致癌性。
