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Composition and pollution characteristics of TSP, PM2.5 atmospheric aerosols at Gosan site, Jeju Island

제주도 고산지역 TSP, PM2.5 대기에어로졸의 조성 및 오염 특성

  • Lee, Soon-Bong (Department of Chemistry, Jeju National University) ;
  • Kang, Chang-Hee (Department of Chemistry, Jeju National University) ;
  • Jung, Duk-Sang (Department of Chemistry, Jeju National University) ;
  • Ko, Hee-Jung (Department of Chemistry, Jeju National University) ;
  • Kim, Haeng-Bum (Department of Chemistry, Jeju National University) ;
  • Oh, Yong-Soo (Department of Chemistry, Jeju National University) ;
  • Kang, Hae-Lim (Department of Chemistry, Jeju National University)
  • Received : 2010.07.06
  • Accepted : 2010.07.21
  • Published : 2010.08.25

Abstract

TSP and PM2.5 atmospheric aerosols have been collected at Gosan site of Jeju Island, and their compositions were analyzed to understand the pollution characteristics. The composition ratios of nss (non-sea salt)-$SO_4^{2-}$ and $NH_4^+$ were higher in Gosan site than those in other Korean background and urban sites. However the composition ratio of $NO_3^-$ was conversely lower in Gosan site. From the study of aerosol components according to particle sizes, the anthropogenic nss-$SO_4^{2-}$, $NO_3^-$ and $NH_4^+$ components were mostly existed in the fine particles. But the nss-$Ca^{2+}$, $Na^+$, $Cl^-$ and $Mg^{2+}$ originated from soil and marine sources were distributed relatively in the coarse particles. In the seasonal comparison, the concentrations of nss-$Ca^{2+}$, Al, Fe, Ca and $NO_3^-$ increased in spring season, and nss-$SO_4^{2-}$ showed higher concentration in summer and spring seasons. Based on the factor analysis, the atmospheric aerosols in Gosan site have been found to be influenced largely by anthropogenic sources, and next by marine and soil sources. The backward trajectory analyses showed that the concentrations of nss-$SO_4^{2-}$, $NO_3^-$, Pb and nss-$Ca^{2+}$ increased when the air mass moved from Chinese continent to Jeju area. On the other hand, their concentrations decreased when the air mass moved in from the North Pacific Ocean.

Keywords

atmospheric aerosols;TSP;PM2.5;aerosol composition;particle size;Gosan site

Acknowledgement

Supported by : 한국학술진흥재단

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