Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Comparison of culturable airborne bacteria and related environmental factors at underground subway stations between 2006 and 2013
Abstract In this study, we evaluated concentrations of culturable airborne bacteria (CAB) from 16 underground subway stations of Seoul Metro, Korea, between 2006 and 2013 to identify influential environmental factors, including the presence of platform screen doors (PSD), temperature, relative humidity, depth of the station, and year of construction. In total, 66 air samples were collected from all stations. Results indicated that CAB concentrations and the number of gram-negative bacteria (GNB) were significantly lower in stations with PSD and in which GNB were not detected than in stations lacking PSD and in which GNB were detected. Although there was no significant difference in CAB concentrations with variations in time, CAB concentrations of stations appeared to alter with time due to variation in the number of passengers in transit; indeed, there was a significant association between CAB concentration and the number of passengers passing through a station. The source of CAB seemed to be the poor air quality in the old subway stations. Therefore, ventilation management should be inspected more regularly, and indoor air quality should be controlled in underground subway stations.
Highlights Culturable airborne bacteria (CAB) concentrations of the stations with PSD and lack of GNB species were significantly lower. CAB concentrations did changed over time due to the variation in the number of passengers. The source of CAB seemed to be the poor air quality in the old subway stations.
Comparison of culturable airborne bacteria and related environmental factors at underground subway stations between 2006 and 2013
Abstract In this study, we evaluated concentrations of culturable airborne bacteria (CAB) from 16 underground subway stations of Seoul Metro, Korea, between 2006 and 2013 to identify influential environmental factors, including the presence of platform screen doors (PSD), temperature, relative humidity, depth of the station, and year of construction. In total, 66 air samples were collected from all stations. Results indicated that CAB concentrations and the number of gram-negative bacteria (GNB) were significantly lower in stations with PSD and in which GNB were not detected than in stations lacking PSD and in which GNB were detected. Although there was no significant difference in CAB concentrations with variations in time, CAB concentrations of stations appeared to alter with time due to variation in the number of passengers in transit; indeed, there was a significant association between CAB concentration and the number of passengers passing through a station. The source of CAB seemed to be the poor air quality in the old subway stations. Therefore, ventilation management should be inspected more regularly, and indoor air quality should be controlled in underground subway stations.
Highlights Culturable airborne bacteria (CAB) concentrations of the stations with PSD and lack of GNB species were significantly lower. CAB concentrations did changed over time due to the variation in the number of passengers. The source of CAB seemed to be the poor air quality in the old subway stations.
Comparison of culturable airborne bacteria and related environmental factors at underground subway stations between 2006 and 2013
Hwang, Sung Ho (Autor:in) / Park, Jae Bum (Autor:in)
Atmospheric Environment ; 84 ; 289-293
26.11.2013
5 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
| SAGE Publications | 2017
| Engineering Index Backfile | 1907