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Evaluation on Air Quality inside Subway Driver Cabin by Monitoring PM, $CO_2$, and CO Levels  

Kwag, Hyun-Suk (Wonjin Institute for Occupational and Environmental Health)
Jin, Ku-Won (Department of Environmental Health, Korea National Open University)
Kim, Won (Wonjin Institute for Occupational and Environmental Health)
Yang, Won-Su (Wonjin Institute for Occupational and Environmental Health)
Choi, Sang-Jun (Wonjin Institute for Occupational and Environmental Health)
Park, Dong-Uk (Department of Environmental Health, Korea National Open University)
Publication Information
Journal of Environmental Health Sciences / v.31, no.5, 2005 , pp. 379-386 More about this Journal
Abstract
[ $PM_{10},\;PM_{2.5},\;CO_2\;and\;CO$ ] in driver cabins of subway line from 5 to 8 were monitored from 07:00 through 21:00 (or 19:30 or 20:00) on May. Driver cabin of subway line 7 showed the highest $PM_{10},\;PM_{2.5},\;CO_2\;and\;CO$ concentrations. General Linear Model indicated that subway line, subway location (ground and underground track) and running time (morning and afternoon) significantly influenced the concentrations of $PM_{10},\;PM_{2.5},\;CO_2\;and\;CO$ (p=0.000). Daily profile of $PM_{10},\;PM_{2.5},\;CO_2\;and\;CO$, expressed as an 30 minutes average, showed similar variation pattern over day period. These concentrations showed the highest concentrations between 07:00 and 09:00 of rush hour, slightly dropped and again rose slightly after 18:00. In correlation analysis, significant relations among $PM_{10},\;PM_{2.5},\;CO_2\;and\;CO$ were detected (p<0.01). In particular, correlation coefficient between $PM_{10}\;and\;PM_{2.5}$ was highly significant (r=0.884). Regression analysis also concluded that $PM_{10}$ concentration significantly explained 71.4% of variation of $PM_{2.5}$ concentration (p=0.000, $R^2=0.714$). Correlations by CO with $PM_{10}\;and\;PM_{2.5}$ were 0.451 and 0.520, which were higher than those by $CO_2$. Further study is needed to examine the sources of $PM_{2.5}$ and CO in subway and to compare pollutants concentration among subway lines.
Keywords
$PM_{10}$; $PM_{2.5}$; subway; $CO_2$; CO;
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  • Reference
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