2004年北京秋季大气颗粒物的化学组分和来源特征  

Researches on Chemical Composition and Sources of Atmospheric Particles in Autumn of Beijing in 2004

作　　者：浦一芬[1] 吴瑞霞[1] 

机构地区：[1]中国科学院大气物理研究所,北京100029

出　　处：《气候与环境研究》2006年第6期739-744,共6页Climatic and Environmental Research

基　　金：国家高科技研究发展计划项目2005AA641010

摘　　要：2004年9月在北京城区进行了大气颗粒物采样,样品用PIXE方法进行了分析,得到了20种元素的浓度及其谱分布。并对北京颗粒物的谱分布、富集因子和来源进行了分析研究。发现K元素浓度分布呈细粒态单峰谱分布,细粒态K富集因子较高,表明了生物质燃烧的主要贡献。因子分析结果还表明,土壤尘、生物质燃烧、煤烟尘、工业源和汽车尾气排放源对秋季北京局地排放源有明显贡献。In September 2004, atmospheric particle samples were collected by cascade at meteorological tower at the height of 8 m in Beijing city. The particle samples were analyzed using PIXE method, which resulted in 20 elemental concentrations and elemental distribution. From the observation, the element size distribution, enrichment factors and sources apportionment of particles are analyzed. The fine-mode distribution and high enrichment factors of fine aerosols of K indicated its main source of biomass burning. Factor analysis on the chemical composition of particles shows that sources of soil matters, biomass burning, coal combustion, industry dust and vehicle emission contributed to aerosols in autumn in Beijing.

关 键 词：气溶胶 化学成分 因子分析 PIXE分析 

分 类 号：P402[天文地球—大气物理学与大气环境]