Spatial distribution and seasonal variation of atmospheric bulk deposition of polycyclic aromatic hydrocarbons in Beijing-Tianjin region, North China |
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| Authors: | Wang Wentao Massey Simonich Staci L Giri Basant Xue Miao Zhao Jingyu Chen Shejun Shen Huizhong Shen Guofeng Wang Rong Cao Jun Tao Shu |
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| Institution: | a Laboratory for Earth Surface Processes, College of Urban and Environmental Sciences, Peking University, Beijing 100871, Chinab The Administrative Center for China’s Agenda 21 (ACCA21), Ministry of Science and Technology, Beijing, 100038, Chinac Department of Environmental and Molecular Toxicology and Department of Chemistry, Oregon State University, Corvallis, OR 97331, USAd State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China |
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| Abstract: | Bulk deposition samples were collected in remote, rural village and urban areas of Beijing-Tianjin region, North China in spring, summer, fall and winter from 2007 to 2008. The annually averaged PAHs concentration and deposition flux were 11.81 ± 4.61 μg/g and 5.2 ± 3.89 μg/m2/day respectively. PHE and FLA had the highest deposition flux, accounting for 35.3% and 20.7% of total deposition flux, respectively. More exposure risk from deposition existed in the fall for the local inhabitants. In addition, the PAHs deposition flux in rural villages (3.91 μg/m2/day) and urban areas (8.28 μg/m2/day) was 3.8 and 9.1 times higher than in background area (0.82 μg/m2/day), respectively. This spatial variation of deposition fluxes of PAHs was related to the PAHs emission sources, local population density and air concentration of PAHs, and the PAHs emission sources alone can explain 36%, 49%, 21% and 30% of the spatial variation in spring, summer, fall and winter, respectively. |
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| Keywords: | PAHs Bulk deposition Flux Seasonal variation Beijing Tianjin |
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