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http://dx.doi.org/10.14249/eia.2019.28.2.113

The Characteristics of Black Carbon of Seoul  

Park, Jongsung (Climate & Air Quality Research Department, National Institute of Environmental Research)
Song, Inho (Climate & Air Quality Research Department, National Institute of Environmental Research)
Kim, Hyunwoong (Climate & Air Quality Research Department, National Institute of Environmental Research)
Lim, Hyungbae (Climate & Air Quality Research Department, National Institute of Environmental Research)
Park, Seungmyung (Climate & Air Quality Research Department, National Institute of Environmental Research)
Shin, Suna (Climate & Air Quality Research Department, National Institute of Environmental Research)
Shin, Hyejoung (Climate & Air Quality Research Department, National Institute of Environmental Research)
Lee, Sangbo (Climate & Air Quality Research Department, National Institute of Environmental Research)
Kim, Jeongho (Research Center, APM Engineering Co. Ltd.)
Publication Information
Journal of Environmental Impact Assessment / v.28, no.2, 2019 , pp. 113-128 More about this Journal
Abstract
The concentration and coating thickness of black carbon (BC) were measured along with fine dust in the fall of 2018, at the Seoul Metropolitan Area Intensive Monitoring Station (SIMS). In fall, the concentration of $PM_{10}$ and $PM_{2.5}$ was $23{\pm}12.6{\mu}g/m^3$ and $12{\pm}5.8{\mu}g/m^3$, respectively, lower than that in other seasons. The BC level, measured using an Aethalometer, was $0.73{\pm}0.43{\mu}g/m^3$, while the levels of elemental carbon (EC) and refractory-BC (rBC), measured by semi-continuous carbon analyzer (SOCEC) and single particle soot photometer (SP2), were $0.34{\pm}0.18{\mu}g/m^3$ and $0.32{\pm}0.18{\mu}g/m^3$, respectively. As such, the concentration level differed according to the measurement method, but its time-series distribution and diurnal variation showed the same trends. The BC concentration at SIMS was primarily affected by automobiles with higher levels of BC during morning and evening commuting times due to increased traffic congestion. rBC, measured by SP2, had a peak concentration and coating thickness of 84 nm and 43 nm, respectively. Notably, the coating thickness had an inverse relationship with particle size.
Keywords
$PM_{2.5}$; Black carbon; Coating thickness; SP2 (Single Particle Soot Photometer);
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