中文摘要：

分别于2008年11月及2009年4～5月及10月采集了杭州大气颗粒物样本,测定了杭州市大气颗粒物及其化学组分[元素碳（EC）/有机碳（OC）、11种水溶性离子、20种元素]的浓度,并研究了其粒径分布特征.结果表明,杭州市大气颗粒物质量浓度、EC和OC的质量浓度、9种离子（SO42-、NO3-、K＋、Na＋、Cl-、Ca2＋、Mg2＋、NO2-、F-）浓度的粒径分布均显双峰结构,峰值分别出现在〈0.49μm的细粒径段与3.00～7.20μm的粗粒径段;OC、EC、SO42-、NO3-、NH4＋以及主要来自人为源的元素（Cu、Zn、As、Se、Sb、Cd）主要集中在〈3.0μm的细颗粒物中;杭州市大气细颗粒物中二次污染严重,细颗粒物主要受工业、交通等人为源影响.

英文摘要：

Size distributions of mass concentrations and chemical components in Hangzhou atmospheric particles were determined.The chemical components consisted of organic carbon（OC） and elemental carbon（EC）,11kinds of water-soluble ions,and 20kinds of trace elements.The size distributions of mass concentrations appeared significantly a bi-modal with peaks in the particles with size of 0.49μm and 3.00~7.20μm,respectively,as well as those of chemical components of OC,EC,SO42-,NO3-,K＋,Na＋,Cl-,Ca2＋,Mg2＋,NO2-and F-.The OC,EC,SO42-,NO3-,NH4＋ and trace elements of Cu,Zn,As,Se,Sb,Cd derived from anthropogenic sources mainly focused in fine particulate matters（3.0μm）,so this suggested that a serious secondary pollution existed in the fine particles,and the fine particles were mainly affected by the anthropogenic sources derived from industrial and traffic pollutions.