2021~2022년 서울 도심의 PM2.5 조성과 전구 기체 분포 특성

• Published in: 한국대기환경학회지(국문) Vol. 39; no. 4; pp. 525 - 534
• Main Authors: 이현민(Hyunmin Lee), 길준수(Junsu Gil), 이미혜(Meehye Lee)
• Format: Journal Article
• Language: Korean
• Published: 한국대기환경학회 01.08.2023
• Subjects: 대기과학; MARGA; composition; 2.5< Particulate nitrate; Nitrate oxidation ratio; PM< Neutralization factor; SUB&gt
• ISSN: 1598-7132; 2383-5346
• DOI: 10.5572/KOSAE.2023.39.4.525

In this study, the secondary inorganic ions including NO3 -, SO4 2-, and NH4 +, and the precursor gases including NH3 were measured every hour using the Monitor for AeRosols and Gases in ambient Air (MARGA) in urban Seoul from May 2021 to November 2022, and examined their monthly distributions and characteristic relationship between PM2.5 composition and precursor gases. PM2.5 and particulate nitrate concentrations were highest in the late fall and lowest in the summer. While NO2 and SO2 were higher in the cold months than in the warm months, NH3 showed the opposite tendency, except for November 2022. Nitrate oxidation ratio (NOR) was lower than 0.1, which is even lower than those of Chinese cities, which is indicative of the nonlinear nature of the nitrate formation processes. The monthly analysis of neutralization factor (fN), reveals that NH4 + was sufficient to neutralize SO4 2- and NO3 -. KCI Citation Count: 0