【作者】 赵淑莉； 代天有； 段小丽； 魏复盛；

【Author】 Zhao Shuli, Dai Tianyou, Duan Xiaoli, Wei Fusheng (China National Environmental Monitoring Center, Beijing 100029; Chinese Research Academy of Environmental Sciences, Beijing 100012)

【机构】 中国环境监测总站； 中国环境科学研究院；

【摘要】 本文对北京市不同功能区十三陵、石景山、车公庄和芍药居环境空气进行了采集和测量,采集的样品包括气相和颗粒相中的多环芳烃,采样流速为450L-500L/每分钟,采集时间不小于10小时,将采集后的样品进行预处理,然后用液相色谱进行分析。实验结果表明北京城市空气中多环芳烃污染比较严重,大于四环的多环芳烃在颗粒相占主导,小于四环的多环芳烃主要分布在气相中。采暖期的PAHs 污染比非采暖期较为严重,取暖所带来的污染占主要成分;研究结果同时显示夜间柴油车所产生的污染不容忽视。更多还原

【Abstract】 Results from measurements of polycyclic aromatic hydrocarbons in ambient air in Beijing were presented. The samples were collected from September 1998 to July 2002 at four sites and one of four sites was a reference site. The sampling equipment was high-volume sampler capable of pulling ambient air through the filter/sorbent cartridge at 0.45-0.50 standard cubic feet per minute and a total sample volume of greater than 300 standard cubic feet over a 10-hour period, and analysis was by HPLC/UV. PAHs with less than four rings were higher in the gas-phase than in the particle-phase, and PAHs with more than four rings were predominant in the particle-phase. Serious PAHs pollution in the night may be produced by the diesel vehicle fuels and exhaust emissions.更多还原