基于单颗粒气溶胶质谱技术研究重污染过程PM_(2.5)化学组成及来源

Chemical Compositions and Sources of PM_(2.5) During Heavy Air Pollution Process Based on Single Particle Aerosol Mass Spectrometry

为了分析重污染天气PM_(2.5)化学组成及来源,利用单颗粒气溶胶质谱技术,在凤台县主城区开展了连续21d在线监测。结果表明:监测期间环境空气中PM_(2.5)主要成分为元素碳颗粒(29.2%),其次是富钾颗粒(26.2%),第三为有机碳颗粒(20.8%);监测期间共发生了三次PM_(2.5)为首要污染物的重污染天气,机动车尾气和燃煤为主要污染源。

In order to analyze the chemical compositions and sources of PM（2.5） during heavy air pollution process,single particle aerosol mass spectrometry was used to conduct online monitoring the chemical compositions of PM（2.5） on Fengtai urban area for 21 days.The results showed that the most main chemical components of PM（2.5） in environmental air during monitoringperiod was Element Carbon（29.2%）;the second was K-rich（26.2%）;the third was Organic Carbon（20.8%）.Three PM（2.5） as the primary pollutantoccurred during the monitoring period.The motor vehicle exhaust and coal combustion resulted in the three heavy air pollution,where PM（2.5） isas the primary pollutant.