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KMID : 0895420070170010013
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Journal of Korean Society of Occupational and Enviromental Hygiene
2007 Volume.17 No. 1 p.13 ~ p.20
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A Study of PM Levels in Subway Passenger Cabins in Seoul Metropolitan area
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Roh Young-Man
Park Wha-Me
Park Dong-Sun
Kim Yoon-Shin
Lee Cheol-Min
Kim Suck-Won
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Abstract
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This study was performed to investigate the concentrations of PM(PM10, PM2.5, PM1) and it’s affecting factors in the subway from line 1 to line 8 in Seoul metropolitan area, from Sep. 1 to 30, 2005. PM concentrations were measured at the entrances and centers in subway passenger cabins by a light scattering equipment. And the affecting factors to PM were estimated based on the number of passenger, door open and close and running area etc. The geometric means of PM10, PM2.5 and PM1 concentration in Seoul subway passenger cabins were 214㎍/m3, 86.6㎍/m3 and 27.0㎍/m3, respectively. These mean concentrations in subway carriage were higher when it ran on an underground track than on a ground track. And running time(7AM-9AM, 11AM-13PM, 6PM-8PM) significantly influenced to the concentrations of PM10, PM2.5 and PM1. Daily profile of PM10 and PM2.5, PM1 expressed as an 10 minutes average, showed similar variation pattern over day period. In correlation analysis, significant relations among PM10, PM2.5 and PM1 were detected(p〈0.01). In particular, correlation coefficient between PM10 and PM1 was highly significant(r=0.94). Further study is needed to identity the sources of PM in subway cabins and to compare pollutants concentration among subway lines.
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KEYWORD
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PM10, PM2.5, PM1, subway, passenger cabin
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