Analytical Science and Technology (분석과학)

The Korean Society of Analytical Sciences (한국분석과학회)
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Composition and pollution characteristics of PM10 and PM2.5 particles at Gosan site of Jeju Island in 2008

PM10, PM2.5 미세먼지의 조성 및 오염 특성: 2008년 제주도 고산지역 측정 결과

  • Received : 2011.08.04
  • Accepted : 2011.08.09
  • Published : 2011.08.25
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Abstract

The collection of atmospheric $PM_{10}$ and $PM_{2.5}$ particle samples was made at Gosan site of Jeju Island, which is one of the most representative background sites in Korea. Their chemical compositions have been analyzed to explore the pollution characteristics and emission sources. The mass concentrations of $PM_{10}$ and $PM_{2.5}$ particles were $37.6{\pm}20.1$ and $22.9{\pm}14.3{\mu}g/m^3$, respectively, with the content of $PM_{2.5}$ to $PM_{10}$ as 61%. The $PM_{2.5}/PM_{10}$ ratios of nss-$SO_4^{2-}$, $NO_3^-$, and $NH_4^+$ were 0.94, 0.56, 1.02, respectively, indicating that these components were distributed mostly in the fine fractions. Based on the factor analysis, it was found that the compositions of fine particles were mainly influenced by anthropogenic sources, followed by soil or marine sources. The results of the backward trajectory analysis indicate that the concentrations of nss-$SO_4^{2-}$, $NO_3^-$, $NH_4^+$, nss-$Ca^{2+}$, and Pb were high when the air parcels moved from the China continent, while relatively low with the air parcels coming from North Pacific Ocean and/or East Sea.

제주도 고산지역에서 $PM_{10}$과 $PM_{2.5}$ 미세먼지 시료를 채취하여 주요 성분의 화학 조성, 오염 정도, 배출원 특성 등을 조사하였다. 연구기간의 $PM_{10}$과 $PM_{2.5}$ 미세먼지의 질량농도는 각각 $37.6{\pm}20.1{\mu}g/m^3$, $22.9{\pm}14.3{\mu}g/m^3$로 $PM_{2.5}$ 질량농도는 $PM_{10}$의 약 61%를 차지하였다. $PM_{2.5}/PM_{10}$ 농도비를 조사해 본 결과, 인위적 기원의 nss-$SO_4^{2-}$, $NO_3$, $NH_4^+$은 주로 미세입자에, 그리고 nss-$Ca^{2+}$과 $Na^+$, $Cl^-$, $Mg^{2+}$ 성분들은 대부분 조대입자에 많이 분포하였다. 또 미세먼지 조성은 대체적으로 인위적 오염원의 영향이 가장 크고, 다음으로 토양 또는 해양의 영향을 많이 받는 것으로 나타났다. 역궤적 분석법으로 미세먼지 성분들의 유입경로를 조사해 본 결과, nss-$SO_4^{2-}$, $NO_3^-$, $NH_4^+$, nss-$Ca^{2+}$, Pb 성분들은 대체적으로 기류가 중국대륙과 한반도로부터 유입되었을 때 농도가 높게 나타났다. 반면에 북태평양이나 동해를 통해 유입되었을 때는 상대적으로 낮은 경향을 보였다.

Keywords

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