Particle and Aerosol Research
Vol. 13, No. 2, June 2017, Pages 87-95
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ISSN : 1738-8716 (Print)
ISSN : 2287-8130 (Online)
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The Correlation between Radon (Rn222) and Particulate Matters
(PM10, PM2.5, PM1.0) in Subway Tunnel in Seoul.
Michael Versoza1)2), Duckshin Park1)2)*
1)Transportation Environmental Research Team, Korea Railroad Research Institute, Uiwang City, South Korea
2)Railway System Engineering, University of Science and Technology, Daejeon City, South Korea
*Corresponding author.
Tel.: +82-31-460-5367, E-mail: dspark@krri.re.kr
Received 27 March 2017, Revised 02 June 2017, Accepted 13 June 2017, Available online 30 June 2017
http://dx.doi.org/10.11629/jpaar.2017.6.30.065
Abstracts
Radon (Rn222) is a radioactive gas and is found at high concentrations underground. Investigations were done in
many years specifically on public transportations such as in the subway stations, concourses and platforms for these
are located underground areas. This study correlates the Rn222 concentrations with the Particulate Matter (PM)
concentration for the gas could be attached or trapped inside these particles. It was done on the opening subway
tunnel of Miasageori Station going to Mia Station (Line 4) last August 2016. Based on the result, the Rn222 were more
influenced on the mass ratio (%) of PM present in the air instead of its mass concentration (긏g/m3). As the PM10
mass ratio increases (42.32 ¡Ó 1.03%) during morning rush-hours, radon starts to increase up to 0.97 ¡Ó 0.03pCi/L. But
during the afternoon Rn222 concentrations decreased while the composition were stable at 22.96 ¡Ó 3.0%, 39.04 ¡Ó 0.6%
and 38.01 ¡Ó 0.3% in PM1, PM2.5 and PM10 respectively. It was then assumed that it could be the composition of the
morning hours of the station were influencing the concentration of the radon.
Keywords
Radon, Subway, Indoor Air Quality, Health
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