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초록

Secondary air pollutants in urban air are generated by physical and chemical reactions. Respiratory disorders in humans, building corrosion, and reduction invisibility are mostly caused by secondary aerosols comprising fine particles with a diameter of 2.5 μm or less(PM2.5). Secondary air pollutants contain numerous components, such as inorganic and organic compounds, water, and heavy metals. The percentage of SO4
2-, NO3-, and NH4+ ions in the secondary air pollutants is 40∼50%. Therefore, it is important to identify the components of SO42- NO3-, and NH4+ and to evaluate the effect of each component on the human body. In this study, the composition of air in terms of the percentage of SO4 2-, NO3-, NH4+ present was investigated from January 2017 to December 2018 in Seoul. These were then evaluated on the basis of the effects of weather conditions, including temperature and wind direction. As a result, the concentration of NO3- and NH4+ decreased in July, August, and September(summer