Abstract:
Airborne volatile organic compounds (VOCs) were measured by The Pollution Control Department on a monthly basis from January 2009 to December 2012. VOCs concentration data of monitoring station in Maptaphut area and Dindaeng (Bangkok) were analysed for VOCs/Bz ratios, BTEX ratios and principle component analysis (PCA) to identify sources and elaborate the sources profile of VOCs. The contribution of aromatics to total VOCs was greater than other chemical groups for all monitoring sites. VOCs concentrations at Dindaeng were about 1.32-1.70 times greater than those in Maptaphut area. The results of this study can be classified VOCs into three groups based on emission sources including mobile sources, industrial sources and other sources (household). Moreover, some species of VOCs had background concentration in ambient air. Overall results suggest that dominant emission source of VOCs was a mobile source. Therefore, an effort to control both mobile and industrial emission sources should be implemented for solving the VOC problem in Maptaphut area.