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KMID : 1024520030120060665
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Journal of the Environmental Sciences
2003 Volume.12 No. 6 p.665 ~ p.676
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A Study on Chemical Composition of Fine Particles in the Sungdong Area, Seoul, Korea
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Cho Yong-Sung
Lee Hong-Suk
Kim Yoon-Shin
Lee Jong-Tae
Park Jin-Soo
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Abstract
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To investigate the chemical characteristics of PM2.5/ in Seoul, Korea, atmospheric particulate matters were collected using a PM10/ dichotomous sampler including PM10/ and PM2.5/ inlet during the period of October 2000 to September 2001. The Inductively Coupled Plasma-Mass Spectromety (ICP-MS), ion Chromatography (IC) methods were used to determine the concentration of both metal and ionic species. A statistical analysis was performed for the heavy metals data set using a principal component analysis (PCA) to derived important factors inherent in the interactions among the variables. The mean concentrations of ambient PM2.5/ and PM/sub10/ were 24.47 and 45.27 /㎥, respectively. PM2.5/ masses also showed temporal variations both yearly and seasonally. The ratios of PM2.5/PM10/ was 0.54, which similar to the value of 0.60 in North America. Soil-related chemical components (such as Al, Ca, Fe, Si, and Mn) were abundant in PM10/, while anthropogenic components (such as As, Cd, Cr, V, Zn and Pb) were abundant in PM2s. Total water soluble ions constituted 30∼50 % of PM2.5/ mass, and sulfate, nitrate and ammonium were main components in water soluble ions. Reactive farms of NH+/were considered as NHNO and (NH)SO during the sampling periods. In the results of PCA for PM2.5/, we identified three principal components. Major contribution to PM2.5/ seemed to be soil, oil combustion, unidentified source. Further study, the detailed interpretation of these data will need efforts in order to identify emission sources.
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KEYWORD
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PCA(principal component analysis)
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