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KMID : 1156220170430010071
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Journal of Environmental Health Sciences
2017 Volume.43 No. 1 p.71 ~ p.76
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Evaluation of Exposure Characteristics of Fine Dusts by Subway Lines
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Hwang Sung-Ho
Kim Jong-Oh
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Abstract
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Objectives: This study aimed to assess the environmental factors that affect particulate matters (PM10) and to compare with outdoor PM10 concentrations in an underground subway stations.
Methods: The PM10 level was determined from May 2013 to September 2013 in the Seoul subway stations in four lines. PM mini-vol portable sampler sampler was used to collect PM10 for 6 hrs. Arithmetic means of PM10 concentrations with standard deviation (SD) were calculated. Paired t-test was used to compare the differences between indoor PM10 and outdoor PM10 concentrations with correlation analysis which was used to identify the association between indoor PM10 concentrations and environmental factors.
Results: There were no different PM10 concentrations significantly between line 1, 2, 3 and 4 in an underground subway stations. Passenger number was positively associated with PM10 concentration while construction year was negatively associated with PM10 concentrations. Indoor PM10 concentrations were significantly higher than those in outdoor PM10 concentrations. PM10 concentrations were higher in the stations which were constructed before 1990s rather than the stations constructed after 1990s.
Conclusion: PM10 levels in the underground subway stations varied greatly depending on the construction year. Therefore, it might need to be more careful management to the stations which constructed in before 1990s.
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KEYWORD
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IAQ (Indoor air quality in subway platform) , IAP (Indoor Air Pollution) , I/O ratio , PM10 , Construction year , Outdoor PM10
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