백령도 미세먼지 고농도 사례 시 PM2.5 산성도 분석: 2013~2014년

• Published in: 한국대기환경학회지, 34(6) pp. 780 - 791
• Main Authors: 반지희(한국외국어대학교, 박태현(한국외국어대학교, 박승명, 신혜정, 임용재, 최진수, 이민도, 이상보, 김정수, 이태형
• Format: Journal Article
• Language: Korean
• Published: 한국대기환경학회 01.12.2018
• Subjects: 대기과학
• ISSN: 1598-7132; 2383-5346
• DOI: 10.5572/KOSAE.2018.34.6.780

In order to better understand the chemical properties and acidity of PM2.5 at Baengnyeong Island, the relationship among Ionic compounds (NO3 -, SO4 2-, Cl-, NH4 +, Na+, Ca2+, K+, Mg2+) and the acidity of PM2.5 were examined for the selected six periods of the highest PM2.5 concentration from 2013 to 2014. The sulfate was dominant among inorganic compounds in the selected PM2.5 episodes. The acidity in PM2.5 was varied depending on the air masses and season. The PM2.5 for air masses by transport from east Asia including South Korea was relatively close to be acidic compared to the air masses travel mostly through eastern China from China into Baengnyeong Island. The sulfate could not be fully neutralized on ammonia-poor conditions when the air masses were introduced from ammonia-poor region through eastern China. When the airmass came from the Korea peninsula which is more likely ammonia-rich condition, sulfate and nitrate observed to be neutralized by reacting with ammonia, resulting in relatively high PM2.5 concentration. To investigate the potential changes of the PM2.5 concentration in Korea, it is necessary to determine the local ammonia concentration and the acidity of PM2.5, which increase the local PM2.5 concentration by further neutralization of acidic particle by ammonia and the potential new particle formation by the excess ammonia and other gaseous species. KCI Citation Count: 1