Vehicular Emissions and Air Quality Standards in Nigeria

European Journal of Scientific Research ISSN 1450-216X Vol.34 No.4 (2009), pp.550-560 © EuroJournals Publishing, Inc. 2009 http://www.eurojournals.com/ejsr.htm

Vehicular Emissions and Air Quality Standards in Nigeria
F. I. Abam Department of Mechanical Engineering, Cross River University of Technology P.M.B 1123. Calabar, Nigeria E-mail: [e-mail] Tel: [phone] G. O. Unachukwu National Centre for Energy Research and Development University of Nigeria Nsukka, Nigeria E-mail: [e-mail] Tel: [phone] Abstract This paper reports the results of the investigation of vehicular emissions in selected areas in Calabar Nigeria. Three areas MP1, MP2 , and MP3 were considered with nine sampling points (SP1 – SP9) in each area placed 8.0m away from the edge of the road in downwind direction. Priority parameters: CO, NO2, SO2, PM10 and noise level were monitored. Other relevant parameters monitored includes ambient temperature, wind direction, wind velocity and traffic count. The results of CO, NO2, SO2, PM10 and noise level were in the range of 3.3-8.7ppm, 0.02 – 0.09ppm, 0.04 – 0.15ppm, 170 - 260 μ g/m3 and 58.5 -72.4dB respectively. The highest level obtained for the air pollution indicators for CO was: 8.7ppm, 7.6ppm and 7.4ppm at SP1 for day 1, 2 and 3. The concentration of SO2 was highest at SP2 with values 0.10ppm and 0.12ppm. Emission concentration for NO2, PM10 and noise level was found to be highest at SP2 where traffic intersections and traffic count is high. All the five monitored air pollutants when compared with AQI level (Air quality index) were in the range of: CO – poor to moderate and moderate to poor in different locations. SO2 – was from very poor to poor, NO2- from very poor to poor, PM10 and noise level was poor at all locations. The overall comparison of data for different sections show that concentration of pollutants is highest at (SP1 – 3) and (SP8 – 9) in the three areas MP1, MP2 , and MP3 due to volume of traffic

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