| Through examining water soluble ions, heavy metal, OC/EC, polycyclic aromatic hydrocarbons concentration and particle size distribution of PM2.5 in Guanghzou, sampled in the autumn and winter from 2009 to 2010, this paper presents the chemical composition and characteristics of PM2.5 in the autumn and winter in Guangzhou. Followed by SO2-4、NO-3 and NH+4,organic matter(OM) was the main compoenent of PM2.5.OC and EC showed familar spatial distribution characters and both were affected by primary discharge.Aluminum,zinc and lead were the top 3 heavy metals in PM2.5 and urban showed higher comcentration than suburbw,while Bap exhibited the opposite. |
