title: Occurrence, sources and health risk assessment of polycyclic aromatic hydrocarbons in urban (Pudong) and suburban soils from Shanghai in China.
abstract: A comprehensive investigation was conducted to the urban (Pudong) and suburban soils in Shanghai. A total of 154 soil samples were analyzed for 26 PAHs including highly carcinogenic dibenzopyrenes (DBPs). The total concentrations ranged from 25.8 to 7380 μg kg(-1) for Σ26PAHs and 18.8 to 6320 μg kg(-1) for 16 USEPA priority PAHs (Σ16PAHs), respectively. The BaP toxic equivalent (BaPeq) concentrations were between 6.41 and 2880 μg kg(-1) for Σ24PAHs, 1.11 and 620 μg kg(-1) for Σ16PAHs and 2.72 and 2250 μg kg(-1) for Σ4DBPs. The high PAH contamination in green land soils might originate mainly from local road traffic and industrial activities, and sewage sludge application or waste water irrigation for soil. Seven sources of soil PAHs in Shanghai were identified by positive matrix factorization (PMF) model. The mean risk quotient (m-RQ) values indicated that there were medium to high ecological risks in 9.10% of soil samples, pyrene (Pyr), benzo[b]fluoranthene (BbF) and benz[a]anthracene (BaA) were the major ecological risk drivers under agricultural use. The cancer risk (CR) values were within the acceptable range at 35.7%, 35.1% and 31.2% of sampling sites for children, youths and adults, respectively. The total lifetime carcinogenic risk (TLCR) values at 57.8% of sampling sites were within the acceptable range. Overall, cancer risks of soil PAHs in all sampling sites in the studied area were below the highest acceptable risk, suggesting that soil PAHs are unlikely to pose a significant cancer risk for population based on ingestion, dermal contact and inhalation exposure pathways.
authors.affiliation: Institute of Environmental Pollution and Health, School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, China. Electronic address: wangxt0323@126.com.
authors.forename: Xue-Tong
authors.initials: XT
authors.lastname: Wang
authors.affiliation: Institute of Environmental Pollution and Health, School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, China.
authors.forename: Lei
authors.initials: L
authors.lastname: Chen
authors.affiliation: School of Light Chemistry and Environmental Engineering, Qilu University of Technology, Jinan 250353, China.
authors.forename: Xi-Kui
authors.initials: XK
authors.lastname: Wang
authors.affiliation: Institute of Environmental Pollution and Health, School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, China.
authors.forename: Bing-Li
authors.initials: BL
authors.lastname: Lei
authors.affiliation: Institute of Environmental Pollution and Health, School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, China.
authors.forename: Yan-Feng
authors.initials: YF
authors.lastname: Sun
authors.affiliation: Institute of Environmental Pollution and Health, School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, China.
authors.forename: Jun
authors.initials: J
authors.lastname: Zhou
authors.affiliation: Institute of Environmental Pollution and Health, School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, China.
authors.forename: Ming-Hong
authors.initials: MH
authors.lastname: Wu
mesh_terms: D000293:Adolescent; D000328:Adult; D002273:Carcinogens / Q000032:analysis* / Q000633:toxicity; D002648:Child; D002681:China; D004781:Environmental Exposure / Q000009:adverse effects / Q000032:analysis*; D006801:Humans; D011084:Polycyclic Aromatic Hydrocarbons / Q000032:analysis* / Q000633:toxicity; D018570:Risk Assessment; D012989:Soil Pollutants / Q000032:analysis* / Q000633:toxicity; D018881:Suburban Health; D014504:Urban Health
chemical_list: D002273:Carcinogens; D011084:Polycyclic Aromatic Hydrocarbons; D012989:Soil Pollutants
keywords: PAHs; PMF model; Risk assessment; Source; Surface soils; m-RQ