Inhalable particles (particulates matter with aerodynamic diameter less than 10μm, PM10) have been found to be associated with environment problems and health problems, so more and more attention concentrates on them. Many achievements of researches on PM10 have been attained overseas. In China, such researches are limited and they usually focus on several urban areas. Researches on PM10 in rural and remote areas are even less than in urban. In order to make up the lack of researches on PM10 in our country, we choose Nanjing University Campus, Xueyan Town and Taihu Area in south of Jiangsu Province as research sites, that represent culture and education area in urban, agricultural area and natural clean area respectively. Inhalable particles(PM10) especially fine particulates(particulates matter with aerodynamic diameter less than 3.3μm, PM3.3) are taken as research emphases. The seasonal variation and spatial variation of PM10 and PM3.3 mass concentration and the characterization of inorganic component in fine particulates are determined by collecting and systematic analysis of paniculate samples in over half a year. The methods of enrichment factor and factor analysis are used to PM3.3 source apportionment of three sites. The results indicate the pollution degrees of PM10 and PM3.3 are different in three areas. The mass concentration in Nanjing University Campus and Xueyan Town is higher than in Taihu Area and the mass cocentration in whiter is higher than in autumn. Moreover, PM3.3 contributes significantly to PM10. S, Si,K, Ca, Al,Na, Fe are the main inorganic elements and SO42-,NO3,NH4+,K+ are the dominant water-soluble ions species in fine particulates. Influenced by local environment condition and long-distance transport of fine particulates, the seasonal and spatial variation of inorganic elements and water-soluble ions show significant difference. The result of enrichment factor indicates the element K, S, Pb, As are enriched relative to their natural abundance in crustal soil, which suggests these elements are related to anthropogenic behavior. Three main sourses of fine particuletes at three sites are identified by factor analysis, namely soil, vehicularemissions and coal burning. The complexity of source in Taihu Area suggusts there exists other sources outsides of local environment The conclusions of research are important supplements of research on inhalable particles in our country. They not only offer references for later research in same areas, but also play an important role in revising Ambient Air Quality Standard of our country.
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