TAILIEUCHUNG - Báo cáo " Estimation of emission factors of air pollutants from the road traffic in Ho Chi Minh City "

The estimation of emissions largely depends on the quality of emission factors used for calculation. The study on the estimation of emission factors is important for calculating the emission of air pollutants from road traffic in Ho Chi Minh City (HCMC). The result of this study is the selection of a suitable method and tracer for estimating emission factors of 15 volatile organic compounds (VOCs) from C2-C6 and NOx from road traffic in HCMC. The survey has been carried out in 3/2 Street, District 10, HCMC from January to March 2007. Three VOCs compounds with high average emission. | VNU Journal of Science Earth Sciences 24 2008 184-192 Estimation of emission factors of air pollutants from the road traffic in Ho Chi Minh City Ho Minh Dzung Dinh Xuan Thang Institute for Environment and Resources Vietnam National University Ho Chi Minh City Received 24 December 2008 received in revised form 27 January 2009. Abstract. The estimation of emissions largely depends on the quality of emission factors used for calculation. The study on the estimation of emission factors is important for calculating the emission of air pollutants from road traffic in Ho Chi Minh City HCMC . The result of this study is the selection of a suitable method and tracer for estimating emission factors of 15 volatile organic compounds VOCs from C2-C6 and NOx from road traffic in HCMC. The survey has been carried out in 3 2 Street District 10 HCMC from January to March 2007. Three VOCs compounds with high average emission factors are hexane 59 7 9 2 mg . iso-pentane 52 7 7 4 mg . and 3-methylpentane 36 1 3 6 mg . and the average emission factor of NOx is 0 20 0 03 g . Besides the emission factors of air pollutants for motorcycles light-duty vehicles and heavy-duty vehicles are calculated by using the linear regression method. Keywords Emission factors Tracer VOCs NOx. 1. Introduction The increasing number of vehicles in HCMC leads to the increase of harmful emissions as well as the concentration of air pollutants. The calculation of air pollution emission by road traffic for simulating the distribution process of air pollutants is of very importance for environmental management. Therefore the study on determining the emission factors to calculate emission of air pollutants from the road traffic in HCMC is necessary so far. Corresponding author. Tel. 84-8-38651132. E-mail minhdung@ There are two approaches to determine the emission factors by road traffic the traditional approach bottom up - directly measurement of exhaust gas from each type of

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