Abstract
Abstract This study analyzes the chemical composition of metallic elements and water-soluble ions in PM 10 and PM 2.5. PM 10 and PM 2.5 concentrations in Busan during 2010-2012 were 97.2±67.5 and 67.5±32.8 ㎍ / ㎥ , respectively, and the mean PM 2.5 /PM 10 concentration ratio was 0.73. The contribution rate of water-soluble ions to PM 10 ranged from 29.0% to 58.6%(a mean of 38.6%) and that to PM 2.5 ranged from 33.9% to 58.4%(a mean of 43.1%). The contribution rate of sea salt to PM 10 was 13.9% for 2011 and 9.7% for 2012, while that to PM 2.5 was 17.4% for 2011 and 10.1% for 2012. PM 10 concentration during Asian dust events was 334.3 ㎍ / ㎥ and 113.3 ㎍ / ㎥ during non-Asian dust events, and the PM 10 concentration ratio of Asian Dust/Non Asian dust was 2.95. On the other hand, the PM 2.5 concentration in Asian dust was 157.4 ㎍ / ㎥ and 83.2 ㎍ / ㎥ in Non Asian dust, and the PM 2.5 concentration ratio of Asian Dust/Non Asian dust was 1.89, which was lower than that of PM 10 . Key words :PM
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