作　　者： ; ; ; ; ; ; ; ; ; ; ;

机构地区： 北京大学城市与环境学院地表过程分析与模拟教育部重点实验室

出　　处： 《环境科学学报》 2004年第4期655-660,共6页

摘　　要： 同步采集并分析了非取暖期北京大学住宅小区和教学楼室内和室外大气样品中气态PAHs含量.结果表明,室内空气中气态PAHs含量高于室外.室内外样品相似的化合物分布谱说明室内污染主要来自室外空气.距交通干线近的样点室内外浓度均高于对照样点,说明非取暖期机动车排放是城市室内外空气中气态PAHs的主要来源.挥发性弱的高环化合物含量表现出比低环易挥发化合物更明显的随距交通干线距离变化的趋势.此外,所有室内空气中气态PAHs含量均高于对应的室外样品. Indoor and ambient air samples were collected in both residential and office buildings on Peking University campus during nonheating season for the measurement of gas phase PAHs. The results revealed that the concentrations of gas phase PAHs in the indoor air were higher than those in the ambient air sampled simultaneously, especially for the less volatile multiring compounds. The similar patterns of PAH profiles were found for the indoor and the ambient samples indicating a common origin. The elevated PAH concentrations in the samples from the location close to main traffic suggested that vehicle emission might be the primary PAH source during nonheating season in the area.

关 键 词： 多环芳烃 空气 污染物 温度

领　　域： [环境科学与工程]