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논문 기본 정보

자료유형
학술저널
저자정보
손세창 (전남대학교) 유근혜 (전남대학교) 박승식 (전남대학교) 이상일 (한국표준과학연구원)
저널정보
한국대기환경학회 한국대기환경학회지(국문) 한국대기환경학회지 제36권 제2호
발행연도
2020.4
수록면
171 - 184 (14page)
DOI
10.5572/KOSAE.2020.36.2.171

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초록· 키워드

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In this study, ATR-FTIR (Attenuated Total Reflectance - Fourier Transform Infrared Spectroscopy) analysis was applied to filter samples to identify the organic functional groups and inorganic components in PM<SUB>2.5</SUB> collected during the period of March 9 through April 8, 2018 at an urban site of Gwangju. In addition, 24-hr PM<SUB>2.5</SUB> samples were used to analysis the organic and elemental carbon (OC and EC), water-soluble OC (WSOC), humic-like substances (HULIS), and 8 ionic species. The average concentrations of PM<SUB>2.5</SUB>, OC, EC, NH₄⁺, NO₃⁻, and SO₄<SUP>2-</SUP> during the study period were 28.1, 5.6, 1.1, 4.4, 6.5, and 5.8 ㎍/㎥, respectively. Concentration of PM<SUB>2.5</SUB> exceeding a 24-hr Korean PM<SUB>2.5</SUB> standard of 35 ㎍/㎥ was linked to rapid increase in concentrations of NO₃⁻ and NH₄⁺. High concentration of PM<SUB>2.5</SUB> was attributed to stable meteorological conditions, such as high surface pressures around Korean peninsula and low wind speed, resulting in accumulation of air pollutants and enhanced formation of secondary aerosol particles. Strong correlations of OC with WSOC (R²=0.91), HULIS (R²=0.96), and K⁺ (R²=0.96) were found, suggesting that OC, WSOC, and HULIS were strongly associated with biomass burning emissions. ATRFTIR analyses showed the presence of carbonyl groups (C=O), organonitrate (R-O-N-O), and inorganic secondary ionic species (NH₄⁺, NO₃⁻, and SO₄<SUP>2-</SUP>) in all PM<SUB>2.5</SUB> samples. In addition, the presence of methylene groups (C-H), which can detect the effects of biomass burning emissions, was confirmed. Peaks of methylene groups appeared on one third of 30 samples (9 days), during which the concentrations of K⁺ and HULIS increased. Finally, the ATR-FTIR analysis indicated the presence of carbonyl group in the urban study site and also methylene group possibly due to biomass burning emissions, identifying the possible emission sources of PM<SUB>2.5</SUB> in Gwangju in spring 2018.

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

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