Source and deposition of polycyclic aromatic hydrocarbons to Shanghai,China  

作　　者：Lili Yan Xiang Li Jianmin Chen Xinjun Wang Jianfei Du Lin Ma 

机构地区：[1]Center for Atmospheric Chemistry,Department of Environmental Science Engineering,Fudan University,Shanghai 200433,China

出　　处：《Journal of Environmental Sciences》2012年第1期116-123,共8页环境科学学报（英文版）

基　　金：supported by the National Natural Science Foundation of China (No. 21177025, 40705045, 40875073, 40728006);the New-teacher Fund for Ph.D Studies of Ministry of Education of China (No. 20070246029);the Science & Technology Commission of Shanghai Municipality (No.09160707700);the Key Project from Ministry of Education of China (No. 108050);the State Key Laboratory of Pollution Control and Resource Reuse Foundation (No. PCRRF1011)

摘　　要：Despite recent efforts to investigate the distribution and fate of polycyclic aromatic hydrocarbons （PAHs） in air, water, and soil, very little is known about their temporal change in wet deposition. As a result of increased attention to public health, a large-scale survey on the deposition flux and distribution of PAH contamination in rainwater was urgently conducted in Shanghai, China. In this study, 163 rainwater samples were collected from six sites, and 15 PAH compounds were detected by the use of a simple solid phase microextraction （SPME） technique coupled with gas chromatography-mass spectrometry. The dominant PAH species monitored were naphthalene, phenanthrene, anthracene, and fluoranthene. The concentration of total PAHs per event was between 74 and 980 ng/L, with an average value of 481 ng/L, which is at the high end of worldwide figures. The annual deposition flux of PAHs in rainwater was estimated to be 4148 kg/yr in the Shanghai area, suggesting rainfall as a major possible pathway for removing PAHs from the atmosphere. Diagnostic analysis by the ratios of An/178 and Fl/Fl＋Py suggested that combustion of grass, wood, and coal was the major contributor to PAHs in the Shanghai region. Back trajectory analysis also indicated that the pollutant sources could be from the southern part of China.Despite recent efforts to investigate the distribution and fate of polycyclic aromatic hydrocarbons （PAHs） in air, water, and soil, very little is known about their temporal change in wet deposition. As a result of increased attention to public health, a large-scale survey on the deposition flux and distribution of PAH contamination in rainwater was urgently conducted in Shanghai, China. In this study, 163 rainwater samples were collected from six sites, and 15 PAH compounds were detected by the use of a simple solid phase microextraction （SPME） technique coupled with gas chromatography-mass spectrometry. The dominant PAH species monitored were naphthalene, phenanthrene, anthracene, and fluoranthene. The concentration of total PAHs per event was between 74 and 980 ng/L, with an average value of 481 ng/L, which is at the high end of worldwide figures. The annual deposition flux of PAHs in rainwater was estimated to be 4148 kg/yr in the Shanghai area, suggesting rainfall as a major possible pathway for removing PAHs from the atmosphere. Diagnostic analysis by the ratios of An/178 and Fl/Fl＋Py suggested that combustion of grass, wood, and coal was the major contributor to PAHs in the Shanghai region. Back trajectory analysis also indicated that the pollutant sources could be from the southern part of China.

关 键 词：polycyclic aromatic hydrocarbons RAINWATER deposition flux SOURCE SHANGHAI 

分 类 号：X132[环境科学与工程—环境科学] S941.523[农业科学—水产养殖]