《Polycyclic aromatic hydrocarbons in urban soils of different land uses in Beijing》.pdfVIP

Journal of Hazardous Materials 177 (2010) 1085–1092 Contents lists available at ScienceDirect Journal of Hazardous Materials j o u rn al h omepage: w w w. elsev /locate/jha z mat Polycyclic aromatic hydrocarbons in urban soils of different land uses in Beijing, China: Distribution, sources and their correlation with the city’s urbanization history Shaoda Liu, Xinghui Xia ∗ , Lingyan Yang, Mohai Shen, Ruimin Liu State Key Laboratory of Water Environment Simulation/School of Environment, Beijing Normal University, Beijing 100875, China a r t i c l e i n f o a b s t r a c t Article history: A total of 127 surface soil samples (0–20 cm) were collected from Beijing’s urban district and determined Received 3 November 2009 for 16 polycyclic aromatic hydrocarbons (PAHs). The mean concentration of PAHs was 1802.6 ng g−1 Accepted 6 January 2010 with a standard deviation of 1824.2 ng g−1. Average PAHs concentration and the percentage of high- Available online 11 January 2010 molecular weight PAHs (4–6-rings) decreased from inner city to exterior areas. This correlated with the urbanization history of Beijing’s urban district and inferred an increasing trend of soil PAHs with Keywords: accumulation time and age of the urban area. PAHs in different land uses decreased in an order Polycyclic aromatic hydrocarbons (PAHs) Urban soil as: culture and education area (CEA) classical garden (CG), busin