| Distribution and Source Apportionment of Polycyclic Aromatic Hydrocarbons from Atmospheric Particulate Matter PM2.5 in Beijing |
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| 作者姓名： | 刘大锰 高少鹏 安祥华 |
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| 作者单位： | School of Energy Resources China University of Geosciences，School of Energy Resources China University of Geosciences，School of Energy Resources China University of Geosciences，Beijing 100083，Beijing 100083 Institute of Tibetan Plateau Research Chinese Academy of Sciences Beijing 100085，Beijing 100083 Center for Environment Impact Assessment of China Beijing 100012 |
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| 基金项目： | 国家自然科学基金，北京市自然科学基金 |
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| 摘 要： | A total of 11 PM2.5 samples were collected from October 2003 to October 2004 at 8 sampling sites in Beijing city. The PM2.5 concentrations are all above the PM2.5 pollution standard （65 μg m^-3） established by Environmental Protection Agency, USA （USEPA） in 1997 except for the Ming Tombs site. PM2.5 concentrations in winter are much higher than in summer. The 16 Polycyclic aromatic hydrocarbons （PAHs） listed as priority pollutants by USEPA in PM2.5 were completely identified and quantified by high performance liquid chromatography （HPLC） with variable wavelength detector （VWD） and fluorescence detector （FLD） employed. The PM2.5 concentrations indicate that the pollution situation is still serious in Beijing. The sum of 16 PAHs concentrations ranged from 22.17 to 5366 ng m^-3. The concentrations of the heavier molecular weight PAHs have a different pollution trend from the lower PAHs. Seasonal variations were mainly attributed to the difference in coal combustion emission and meteorological conditions. The source apportionment analysis suggests that PAHs from PM2.5 in Beijing city mainly come from coal combustion and vehicle exhaust emission. New measures about restricting coal combustion and vehicle exhaust must be established as soon as possible to improve the air pollution situation in Beijing city.
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| 关 键 词： | 碳氢化合物 大气 分布模式 中国 |
| 收稿时间： | 11 December 2006 |
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