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KMID : 1024520170260050591
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Journal of the Environmental Sciences
2017 Volume.26 No. 5 p.591 ~ p.600
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Ionic Compositions of Fine Particulate Matter during Summer and Winter in the Downtown Area of Jejusi City in Jeju Island
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Lee Ki-Ho
Kim Su-Mi
Huh Chul-Gu
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Abstract
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This study was carried out to elucidate the chemical compositions of water-soluble inorganic ions in PM10 and PM2.5 aerosols collected during summer and winter in downtown Jejusi city. The ratios of NO3- to the total mass of ionic species in PM10 and PM2.5 aerosols largely increase in winter compared to summer, while SO4 2- ratios in both aerosols appear to follow the opposite trend. Moreover, concentrations of Na+, Mg2+, Ca2+ and Cl- in PM10 and PM2.5-10 aerosols are higher in winter than in summer. The nitrate concentrations in PM10 and PM2.5 aerosols increase with an identical increase in excess ammonium during winter, however, nitrate formation during summer is not important owing to ammonium-poor conditions.
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KEYWORD
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PM10, PM2.5, Jeju Island, Water-soluble inorganic ions, Excess ammonium
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