Size-dependent characteristics of diurnal particle concentration variation in an underground subway tunnel
- Authors
- Woo, Sang-Hee; Kim, Jong Bum; Bae, Gwi-Nam; Hwang, Moon Se; Tahk, Gil Hun; Yoon, Hwa Hyun; Kwon, Soon-Bark; Park, Duckshin; Yook, Se-Jin
- Issue Date
- Dec-2018
- Publisher
- SPRINGER
- Keywords
- Aerosol; PM; Subway tunnel; Train frequency
- Citation
- ENVIRONMENTAL MONITORING AND ASSESSMENT, v.190, no.12
- Indexed
- SCIE
SCOPUS
- Journal Title
- ENVIRONMENTAL MONITORING AND ASSESSMENT
- Volume
- 190
- Number
- 12
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/15240
- DOI
- 10.1007/s10661-018-7110-8
- ISSN
- 0167-6369
- Abstract
- Understanding characteristics of diurnal particle concentration variation in an underground subway tunnel is important to reduce subway passengers' exposure to high levels of toxic particle pollution. In this study, real-time particle monitoring for eight consecutive days was done at a shelter located in the middle of a one-way underground subway tunnel in Seoul, Republic of Korea, during the summer of 2015. Particle mass concentration was measured using a dust monitor and particle number concentration using an optical particle counter. From the diurnal variations in PM10, PM2.5, and PM1, concentrations of particles larger than 0.54 mu m optical particle diameter were affected by train frequency whereas those of particles smaller than 0.54 mu m optical particle diameter were not changed by train frequency. Number concentration of particles smaller than 1.15 mu m optical particle diameter was dependent on outdoor ambient air particle concentration level, whereas that of particles larger than 1.15 mu m optical particle diameter was independent of outdoor ambient air due to low ventilation system transmission efficiency of micrometer-sized particles. In addition, an equation was suggested to predict the diurnal particle concentration in an underground tunnel by considering emission, ventilation, and deposition effects.
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