Seasonal Variations of Particle-Associated Polycyclic Aromatic Hydrocarbons from Different Functional Zones of Beijing
16 Polycyclic aromatic hydrocarbons (PAHs) associated with PM10 were investigated in samples collected during summer (July-August, 2005) and winter (December 2005-January 2006) in four functional zones (including residential, commercial, industrial and traffic zones) of Beijing. PAHs were analyzed by GC-MS (gas chromatography-mass spectrometry). In the studied areas, the PAH levels followed the trend industrial zone＞residential and commercial zones ＞traffic zone in both seasons, which was mainly related to different anthropogenic activities. The highest concentrations of PAHs in industrial zones (5.1 ng·m-3 in summer, and 107.2 ng·m-3 in winter, respectively) were about 1-25 times higher than the measured values found in other three zones. Relatively higher concentrations of PAHs were observed in samples during winter compared with summer. The composition profiles of PAHs associated with PM10 partly changed during the studied period, indicating that seasonal sources such as residential heating have some effect. The diagnostic ratio evaluations suggested that the major sources for PM10-associated PAHs in Beijng urban areas were the mixed combustion sources such as coal, vehicle exhausts (diesel, gasoline) and nature gas, and the incomplete combustion of coal emission was the most important source of PAHs for industrial ambient samples, although other sources had also an impact on the PAH levels.
DONG Xueling LIU Dameng GAO Shaopeng
School of Materials Science and Engineering, China University of Geosciences, Beijing 100083, China School of Energy Resources, China University of Geosciences, Beijing 100083, China
国际会议
2011 International Symposium on Environmental Science and Technology(2011 环境科学与技术国际会议 2011 ISEST)
广东东莞
英文
467-474
2011-06-01（万方平台首次上网日期，不代表论文的发表时间）