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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 33, Number 11
BKCSDE 33(11)
November 20, 2012 

Comparison of Chemical Compositions of Size-segregated Atmospheric Aerosols between Asian Dust and Non-Asian Dust Periods at Background Area of Korea
Won-Hyung Kim, Jung-Min Song, Hee-Jung Ko, Jin Seog Kim, Joung Hae Lee, Chang-Hee Kang*
Size-segregated atmospheric aerosol, Chemical composition, Asian dust, Background area, Jeju Island
The size-segregated atmospheric aerosols have been collected at 1100 m site of Mt. Halla in Jeju, a background area in Korea, using 8-stage cascade impact air sampler during Asian dust and non-Asian dust storm periods. Their ionic and elemental species were analyzed, in order to examine the pollution characteristics and composition change between Asian dust and non-Asian dust periods. The major ionic species such as nss-SO4 2−, NH4 +, and K+ were predominantly distributed in the fine particles (below 2.1 μm diameter), and besides the NO3 − was distributed more in coarse particle fraction than fine particle. On the other hand, the typical soil and marine species i.e., nss-Ca2+, Na+, Cl−, and Mg2+, were mostly existed in the coarse particles (over 2.1 μm diameter). As well in the elemental analysis of aerosols, the major soil-originated Al, Fe, Ca, and others showed prominently high concentrations in the coarse particle fraction, whereas the anthropogenic S and Pb were relatively high in the fine particle fraction. From the comparison of aerosol compositions between Asian dust and non-Asian dust periods, the concentrations of the soil-originated species such as nss-Ca2+, Al, Ca, Fe, Ti, Mn, Ba, Sr have increased as 2.7-4.2 times during the Asian dust periods. Meanwhile the concentrations of nss- SO4 2− and NO3 − have increased as 1.4 and 2.0 times, and on the contrary NH4 + concentrations have a little bit decreased during the Asian dust periods. Especially the concentrations of both soil-originated ionic and elemental species increased noticeably in the coarse particle mode during the dust storm periods.
3651 - 3656
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