Analysis and Source Analysis of PM2.5 Components in Rongchang District,Chongqing
Using a medium flow sampler,PM2.5 samples were collected from the national air control stations in Rongchang District.The carbon components,water-soluble ion components,and metal element components were analyzed to identify the composition of PM2.5 components.The results show that there are a total of 14 main components(accounting for more than 1%)in PM2.5 in Rongchang District,arranged in descending order of concentration as OC,EC,SO42-,NO3-,Si,Al,Ca,V,Na,Fe,K,Cl-,As,and NH4+.The proportion of secondary components(OC,SO42-,NO3-,etc.)in PM2.5 in Rongchang District is relatively high,reaching 45%.Using the PMF model for analysis,in the PM2.5 of Rongchang District,the contributions of industrial sources,transportation sources,domestic sources,dust,and other sources are 35.7%,29.8%,17.3%,9.3%,and 7.8%,respectively.Industrial sources are the primary contributor,while transportation sources are slightly lower than industrial sources.
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万方数据
