EXPOSURE LEVEL OF PARTICLE MATTER MATERIALS AND CO2 IN SUBWAY CARRIAGES IN SEOUL

The objective of this study is to provide research results of the actual conditions concerning theconcentrations of PM10, PM2.5, PM1 and CO2 among particle and gaseous pollutants in a subwaycarriage. Mean concentrations of PM10, PM2.5 and PM1, and CO2 in a subway carriage wereinvestigated as 215.1101.4 ? m-3, 86.938.6 ? m-3, 27.011.4 ? m-3, and 1,588714 ppm,respectively. These mean concentrations in a subway carriage were higher when it ran on anunderground track than on a ground track. For different hours, particle matter materials' concentrationswere the highest in the morning, followed by noon and evening, and for the CO2 concentration was highin order of morning, evening and noon. In the result of the correlation test among pollutants, thecorrelation degree between PM10 and PM2.5 was 0.92, and that between PM2.5 and PM1 was 0.94. Itshowed high positive correlation and the inclusion rate of PM2.5 to PM10 was 417% and that of PM1 toPM2.5 was 324%. And in the relation of the number of people in a subway carriage to PM10 and CO2,whereas the concentration of PM10 had negative relation to the number of people, that of CO2 hadpositive relation to it. With these pollutants, to calculate the result of adequate numbers of passengersin a passenger carriage by using a regression equation showed 61 persons (34.06 + 0.04 CO2 (ppm) -0.09 PM10(? m-3) (R2=0.30, p