Components and source analysis of PM2.5 in Taixing City
In order to identify the main sources of fine particulate matter(PM2.5)in Taixing,a total of 112 ambient samples were collected around two provincial control sites of Taixing.The results showed that nitrate,organic matter,sulfate and ammonium were the most important components of PM2.5 in Taixing City,and SO42-,NO3-,NH4+,Cl-and K+accounted for a relatively high proportion of water-soluble ions.The contributions of Fe,K,Mg,Zn,Ca and Al were high among the inorganic elements,indicating that dust,biomass combustion,motor vehicle and industrial emissions had a certain impact on PM2.5 concentration in Taixing City.The sources of OC and EC at different points are different,and OC at the site of Government Affairs Center is mainly primary discharge,which is greatly affected by the sur-rounding short-distance combustion sources,while OC at the site of Qiangxi River is mainly a secondary source.The source analysis of PM2.5 using PMF showed that the main sources of PM2.5 in Taixing City in summer were secondary sources(25.9%),biomass combustion sources(20%),mobile sources(18.4%),dust sources(11.9%)and coal combus-tion sources(8.4%).The main sources of PM2.5 in winter were secondary sources(34%),mobile sources(17.7%),coal sources(15.1%),dust sources(14.1%)and industrial sources(8.9%).
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万方数据
