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자료유형
학술저널
저자정보
주서령 (전남대학교) 유근혜 (전남대학교) 박승식 (전남대학교) 이지이 (이화여자대학교) 이상일 (한국표준과학연구원) 지준범 (한국외국어대학교) 이광열 (국립환경과학원) 이민도 (국립환경과학원)
저널정보
한국대기환경학회 한국대기환경학회지(국문) 한국대기환경학회지 제36권 제3호
발행연도
2020.6
수록면
329 - 345 (17page)
DOI
10.5572/KOSAE.2020.36.3.329

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In this study, chemical characteristics of PM<SUB>2.5</SUB> collected between October 1 and November 4, 2019 at Chungcheong region air quality research center in Seosan, were studied to understand reasons leading to PM<SUB>2.5</SUB> increases. 24-hr integrated PM<SUB>2.5</SUB> samples were analysed for organic and elemental carbon (OC and EC), water-soluble OC (WSOC), and eight water-soluble inorganic ions. Over the study period, increase in PM<SUB>2.5</SUB> concentration was attributed to enhancement of organic mass (OM=1.8×OC) and NO₃<SUP>-</SUP> concentrations. Relationships of OC and WSOC with EC, K<SUP>+</SUP>, Cl<SUP>-</SUP>, and secondary NO₃<SUP>-</SUP> showed good-to-strong correlations, suggesting primary emissions (e.g., traffic and biomass burning sources) and secondary organic aerosol (OA) formation contributed to WSOC and OC concentrations. Moreover, high WSOC/OC (mean: 0.54) and OC/EC (mean: 9.0) ratios support the existence of various OA sources at the site. Four PM<sub>2.5</sub> pollution episodes (October, 10 (event I), 17 (event II), 20~22 (event III), and November 02 (event IV)), which exceeded 24-hr PM<SUB>2.5</SUB> Korean standard of 35 μg/m³, occurred and were related to concentration increases in OM and secondary ionic species. Based on synoptic weather patterns, PM<sub>2.5</sub> forecast results, and air mass transport pathways, it was concluded that events I, II, and IV were significantly influenced by locally produced pollutions, while event III was impacted by both long-range transport of air pollutants and local emissions, with the highest concentration of SO₄<SUP>2-</SUP> (7.3 μg/m³). Among the four events, highest OM and NO₃<SUP>-</SUP> concentrations were found in the events IV and III, respectively. Results from this study suggest that strategies to reduce nitrogen oxides and organic aerosols in the study region are formulated to control PM<SUB>2.5</SUB> levels.

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