@article{Lasita Jinawa_Sarawut Thepanondh_2017, title={SUCCESS OF FUEL QUALITY IMPROVING POLICY IN REDUCING BENZENE AIR CONCENTRATIONS IN BANGKOK}, volume={11}, url={https://geomatejournal.com/geomate/article/view/2074}, abstractNote={<p>The Thai’s policy in improving of fuel quality to the changing of emissions and<br>concentrations of air pollutants in Bangkok is evaluated in this study. Benzene content in gasoline had been<br>decreased from 3.5% (EURO II standard) to less than 1.0% (EURO IV standard) since the year 2012. The<br>IVE (International Vehicle Emission) model was applied to develop emission factor of benzene taking into<br>consideration actual fleets and characteristics of vehicles in Bangkok. These vehicles consisted of passenger<br>car, motorcycle, van and pick up, taxi, bus and truck. Then, emission inventory of benzene emitted from<br>mobile sources was calculated. It was found that about 83% of total emissions of benzene were contributed<br>from motorcycle (43%) and passenger car (40%). Emission amounts were reduced from 1.32 x 103<br>ton/year<br>to 0.57 x 103<br>ton/year as resulted from changing of fuel quality from EURO II to EURO IV standard.<br>AERMOD dispersion model was used to simulate ambient ground level concentration of benzene prior and<br>after implementing this policy. Results revealed significantly reduction of benzene concentrations in<br>Bangkok’s environment. Spatial distribution of benzene pollution map illustrated that areas having annual<br>concentration higher than 1.7 g/m3<br>(the Thai’s air quality standard for benzene) were still only found in<br>traffic-congested zone of the central business district in the metropolitan area.<br><br></p>}, number={24}, journal={GEOMATE Journal}, author={Lasita Jinawa and Sarawut Thepanondh}, year={2017}, month={Apr.}, pages={2341–2347} }