Investigation of Emission and Dispersion of PM2.5 Pollutant Emitted from BRT Buses in Tabriz City

Air pollution and its adverse effects on the health, economic, and social issues of societies are so high that many countries in the world put it at the head of their economic and social development programs. Particulate matters, PM2.5, which mostly are emitted from gas oil fueled buses in urban environments, is one of the most important pollutants, which has significant effects on the health of individuals and the environment. About 72% of air pollution in Tabriz is due to mobile sources (Kahforooshan and Fatehifar, 2013). PM2.5 concentration in Tabriz was 18 μg/m3 in 2015, while the standard concentration for this pollutant is 12 μg/m3. In this paper, the IVE emission model was used to determine the amount of PM2.5 pollutants emitted from BRT buses in Tabriz, 4 km distance from Shariati intersection to the university intersection as a case study and AERMOD dispersion model was used to determine the contribution of this fleet to the concentration of PM2.5 pollutant which is measured at three air quality monitoring stations.