质谱直接测量法解析盐城市大气细颗粒物来源

为全面了解盐城市大气颗粒物的组成,摸清以PM2.5为首要污染物的来源,说清其化学组分和源贡献率,于2014年12月16日00:00—2014年12月21日09:00,利用在线单颗粒气溶胶质谱仪,对盐城市细颗粒物进行实时在线源解析。结果表明,盐城首要污染物为燃煤,占比为23.7%,其次是机动车尾气,占比为18.3%,第三位是扬尘,占总颗粒数的15.7%,生物质燃烧占比为14.8%位列第四,工业工艺源、二次无机源和其他源贡献率相对较小。

Analysis of Particulate matter (PM2.5) Sources for Ambient Air in Yancheng by Direct Measurement Using Mass Spectrometry

To get a comprehensive understanding of atmospheric particulates in Yancheng,PM2.5 as the primary pollutant was investigated in respects of its sources,chemical composition and source apportionment. The online single particle aerosol mass spectrometer was used for the real time analysis of the sources of particulate matter in Yancheng from 12 am,December 16th to 9 am,December 21st,2014. The results showed that the main source of particulate matter (PM2.5) for ambient air in Yancheng was coal combustion (23.7%),followed by motor vehicle exhaust (18.3%),dust (15.7%) and biomass burning (14.8%). Industrial pollution sources,secondary inorganic sources and other sources provided relatively small contributions.