Chemical Characters and Sources Identification of PM_10 in Guangzhou Area
- CUI Mingming,WANG Xuesong,SU Hang,ZHANG Yuanhang
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PM10 samples were collected from seven sites in Gua ngzhou area and associated chemical species including seventeen elements(Na, Mg,Al, K, Ca, Ti, V, Mn, Fe, Ni, Cu, Zn, As, Se, Cd, Ba, and Pb), five water solub le ions(SO４2-, NO３-, F-，Cl- and NH4+) ,and organic an d elemental carbons were a nalyzed. This paper discusses chemical characters, the changes of PM10 and maincomponents under different meteorological conditions, and also sources identification of PM10 by principal factor analysis. The results indicated that the averagePM10 concentration was 125.8μg/m3 and organic matter, sulfate and crustal dustwere maj or components with proportions of 24%-32% ,17%-21% and 10%-12%, respective ly in the seven sites. Principal factor analysis indicated that soil dust, oil burning, industry source(including metallurgy, chemistry and electric industry), coalburning, secondary source (by photochemical reaction) and biomass burning were t he main sources of PM10, accounting for 20.7%, 17.8%, 16.3%, 14.3%, 10.4%, and 6.3%, respectively of the total variance in the data set.