백령도 미세먼지 고농도 사례 시 PM<SUB>2.5</SUB><SUB></SUB> 산성도 분석 = 2013~2014년

다국어 초록 (Multilingual Abstract)

In order to better understand the chemical properties and acidity of PM2.5 at Baengnyeong Island, the relationship among Ionic compounds (NO₃ <SUP>-</SUP>, SO₄ <SUP>2-</SUP>, Cl<SUP>-</SUP>, NH₄ <SUP>+</SUP>, Na<SUP>+</SUP>, Ca<SUP>2+</SUP>, K<SUP>+</SUP>, Mg<SUP>2+</SUP>) and the acidity of PM<SUB>2.5</SUB> were examined for the selected six periods of the highest PM<SUB>2.5</SUB> concentration from 2013 to 2014. The sulfate was dominant among inorganic compounds in the selected PM<SUB>2.5</SUB> episodes. The acidity in PM<SUB>2.5</SUB> was varied depending on the air masses and season. The PM<SUB>2.5</SUB> 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 PM<SUB>2.5</SUB> concentration in Korea, it is necessary to determine the local ammonia concentration and the acidity of PM<SUB>2.5</SUB>, which increase the local PM<SUB>2.5</SUB> concentration by further neutralization of acidic particle by ammonia and the potential new particle formation by the excess ammonia and other gaseous species.