| 저자(한글) |
임봉빈,이규성,김주인,홍현수,김장원,조경호,정을규,김인규,안연순 |
| 초록 |
The objective of this study was to explore the characteristics of concentration of indoor air pollutants, such as $PM_{10}$ , $CO_2$ , and $NO_2$ , measured by tele-monitoring system in a Seoul Metropolitan underground railway station from January 1, 2008 to December 31, 2012. The annual average concentration of indoor air pollutants actually varied over a wide range and was found to exhibit marked variation with time and measurement sites (tunnel inlet, platform, and concourse). After installing platform screen doors, the average $PM_{10}$ concentration on platform and concourse was decreased by 43.8% and 31.2%, respectively during the study periods. The relationship between the concentration of $PM_{10}$ and meteorological parameters (relative humidity and rainfall) or the Asian dust events was regarded as statistically significant. The correlations between the number of boarding/alighting passengers and $PM_{10}$ , $CO_2$ , and $NO_2$ were calculated. A p-value of less than 0.01 was regarded as significant except $NO_2$ . The I/O ratio of $PM_{10}$ concentration was elevated after a congested time (about 08:00 am). The average I/O ratios of $NO_2$ were observed in concourse and platform on 03:00 am with $1.76{ pm}0.91$ and $1.50{ pm}0.51$ , respectively. The average daily variation of standard excess rate of $PM_{10}$ and $NO_2$ concentration in concourse and platform was investigated. The highest standard excess rate was observed on 21:00 (09:00 pm). |
