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논문 기본 정보

자료유형
학술저널
저자정보
손세창 (전남대학교) 박승식 (전남대학교)
저널정보
한국대기환경학회 한국대기환경학회지(국문) 한국대기환경학회지 제35권 제4호
발행연도
2019.8
수록면
423 - 437 (15page)
DOI
10.5572/KOSAE.2019.35.4.423

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초록· 키워드

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In this study, mass size distributions of ambient aerosol particles and their water-soluble organic and inorganic species were investigated under high pollution episode. To achieve the aim of this study, 24-hr integrated size-segregated aerosol samples were collected at an ubran site of Gwangju between November 02 and 16, 2018, and analyzed for mass, water-soluble organic carbon (WSOC), and ionic species. During study period, a high pollution episode of fine particulate matter (PM) occurred between November 02 and 07, possibly due to high pressure developed around Korean peninsula, extremely stable air conditions, and long-range transportation of aerosol particles from North Korea and northeastern China region. On November 02~03 when influence of local pollution dominated, ambient aerosol particles, WSOC, NO<SUB>3-</SUB>, SO₄<SUP>2-</SUP>, and NH<SUB>4+</SUB> exhibited bi-modal size distributions with a condensation mode at a particle size of 0.32 μm and a droplet mode at a particle size of 1.0 μm in PM<SUB>1.8</SUB>. While, between November 05 and 07 when long-range transportation of PM was mixed with locally-produced pollution, they showed very pronounced droplet mode size distributions at 1.0 μm, without a condensation mode. NO<SUB>3-</SUB> concentration in PM<SUB>1.8</SUB> during pollution episode increased significantly from 5.9 μg/m³ on November 02 to 21.5μg/m³ on November 06, while SO₄<SUP>2-</SUP> in PM<SUB>1.8</SUB> increased from 1.6 to 5.8 μg/m³, indicating the dominance of local pollution during pollution episode. Furthermore, for WSOC, NO<SUB>3-</SUB>, SO₄<SUP>2-</SUP>, and NH<SUB>4+</SUB>, fraction of droplet mode size (PM<SUB>0.55-1.8</SUB>) to PM<SUB>1.8</SUB> increased gradually as PM pollution got increased, while the condensation mode (PM<SUB>0.17-0.32</SUB>) contribution decreased. In addition, it was demonstrated that relative humidity could be an important factor promoting formation of droplet mode WSOC, NO<SUB>3-</SUB>, and SO₄<SUP>2-</SUP>.

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Abstract
1. 서론
2. 실험 방법
3. 결과 및 고찰
4. 요약 및 결론
References

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