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초록

Secondary air pollutants originate from urban air pollutants through the physical
and chemical reactions. The generated secondary air pollutants, which could cause
damages such as respiratory disorders, building corrosion, and the reduction of visibility,
consists of mainly consists of secondary aerosols with 2.5 m the particulate matter 2.5
μm(PM2.5) or smaller. The PM2.5 of the secondary air pollutants are known to contain
numerous components such as inorganic compounds, organic compounds, moisture, and
heavy metals. Further, the amounts of SO4
2-, NO3
- and NH4
+ in the secondary air
pollutants are in ratio from 40 to 50%. Therefore, it is important to identify the
components of SO4
2-, NO3
- and NH4
+ and to evaluate the contribution of each
component to the human body. In this study, the compositions of SO4
2-, NO3
- and NH4
+
in PM2.5 were investigated from January 2016 to December 2016 in Seoul, Korea. Then,
the effects of weather conditions, including tempe