DEVELOPMENT OF SOURCE PROFILES AND ESTIMATION OF SOURCE CONTRIBUTION FOR HAZARDOUS AIR POLLUTANTS BY THE CHEMICAL MASS BALANCE MODEL IN INDOOR AIR

摘要

The purpose of this study is to characterize the indoor-outdoor relationship of airborne pollutants and recognize probable sources in inside and outside individual apartments in Seoul metropolitan. Simultaneous air monitoring in inside and outside of the 16 Korean Apartments classified into 2 groups: less than 1 year old and more than 4 years old from October, 2004 to February, 2005 were sampled for airborne pollutants(volatile organic compounds, formaldehyde, respiratory particles, carbon dioxide and bacteria) using the Korean Indoor Air Quality Official Method. The concentrations of CO2, TVOCs, HCHO, bacteria and PM 10 in the less than 1 year old apartments were determined to be 773.6±422.3 ppm, 4,393.8±2,758.2 μg/m3, 98.0±56.4 μg/m3, 254.0±186.3 CFU/m3 and 31.7±14.8 μg/m3, respectively. Also, the concentrations of those in the more than 4 years old apartments were determined to be 798.9± 266.5 ppm, 792.7±398.3μg/m3, 70.0±30.7μg/m3, 245.6±122.0 CFU/m3,49.7±28.7 μg/m3, respectively. The average ratios of the indoor and outdoor concentrations of CO2, TVOCs,HCHO, bacteria and PM10 were 2.2, 3.6, 3.1, 3.9 and 1.4, respectively. These results of this analysis is suggested that CO2, TVOCs, HCHO, bacteria and PM10 in indoor air are both emitted from source within the apartment environment and partly come from outdoor air. With the above considerations in mind, it is suggested that the research for source contribution of indoor air pollutants should be expanded and the detailed interpretation of the results on these needed further study(using principal component analysis(PCA), chemical mass balance(CMB) model and so on) in order to identify emission sources.