大气细颗粒物在线源解析方法研究进展

摘要

Based on the reviews at home and abroad on the characteristic chemical composition of PM2.5 ,the mechanism of secondary aerosol formation and source apportionment model,two possible methods of on-line source apportionment of PM2.5 were presented,which are aerosol mass spectrometry coupled with analytical algo-rithm and combined observation of 3 kinds of chemical components coupled with receptor model.The remarks were focused on the latest researches and applications of aerosol mass spectrometry,on-line water-soluble ionic composition,ratio of element carbon (EC)to organic carbon (OC)and metallic element monitoring instruments. An analysis was conducted on the reliabilities,advantages and disadvantages of the results of different instru-ments,from which some suggestions were made that the studies should be strengthened on the atmospheric sec-ondary reaction mechanism and key technical parameters in urban scope,the application of continuous observation of particle′s chemical components in on-line source apportionment research and integrated on-line source appor-tionment method based on multiple information sources and techniques.%基于对国内外关于 PM2．5化学组分特征、二次气溶胶生成机理、源解析模型的研究综述，引入实现 PM2．5在线源解析的2种可能方法，即气溶胶质谱＋解析算法与3类化学组分组合观测＋受体模型。重点阐述了气溶胶质谱及在线水溶性离子、EC ／OC 和金属元素仪器的应用研究现状，并分析了不同仪器测定结果的可靠性、优势及缺陷，在此基础上提出加强城市尺度的大气化学二次反应机理及关键技术参数研究、大气颗粒物化学组分连续观测应用于在线源解析的研究、基于多种信息来源和技术手段的在线源解析方法集成研究等建议。