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Sci-Afric Journal of Scientific Issues, Research and Essays (SJSIRS)

Sci-Afric Journal of Scientific Issues, Research and Essays Vol.5(4) Pp. 034-051 April 2017 Copyright 2017 Sci-Afric Publishers.


Effects of Vehicular Emission on Environmental Pollution in Lagos


*Adeyanju A. A., and Manohar K.

*Mechanical and Manufacturing Engineering Department, University of the West Indies, St Augustine, Trinidad.

*Corresponding Author email: anthonyademolaadeyanju@yahoo.co.uk


Accepted April 24th, 2017


The air we breathe is a mixture of gases and particulate solid and liquid matter. Some of these substances come from natural sources while others are caused by human activities such as our use of motor vehicles, domestic activities, industries and businesses. Air pollution occurs when the air contains substances in quantities that could harm the comfort or health of humans and animals, damage plants and materials. The study investigates the concentrations of CO, NO2, SO2, CO2 and HC arising mainly from the activities of motor vehicles on the ambient air quality of selected sites in Lagos metropolis and the locations are Oshodi, Ojota, Yaba and Lekki while a fourth location (Lekki) was used as a control due to its low level pollution. The sampling was carried out over both the dry and wet season. Results from dry season vehicular emission experimentation indicate that the average CO concentrations at the Oshodi peaked at 29.04ppm. The site also recorded highest concentrations for NO2, SO2, CO2 and HC at 0.042ppm, 0.040ppm, 370.92ppm and 0.030ppm respectively. In the wet season, Oshodi also recorded highest CO concentrations at 18.72ppm. NO2 was highest at 0.03ppm in Yaba and Ojota. Both Oshodi and Ojota area recorded highest SO2 concentration at0.032ppm. Oshodi recorded highest concentrations for both CO2 and HC at 370.92ppm and 0.028ppm respectively. Results from comparison of the average CO concentration with the National Ambient Air Quality Standard (NAAQS), showed that CO concentrations in virtually all sites exceeded the 10ppm for an averaging time of 1 hour in both seasons. The same was true for SO2, which exceeded the 0.01ppm limit for an averaging time of 1 hour. NO2 limit of 0.04ppm for a 1 hour averaging time was exceeded at Oshodi in the morning hour, Ojota in the afternoon, and in the evening hours at Ojota, Oshodi and Yaba all in the dry season. All sites were within limit in the wet season. Results from comparison of the pollutants concentration at the three classified locations indicates that all pollutants concentration decreased with increased distance away from the traffic sites. The model developed is therefore useful for planning of residential and other facilities in Lagos metropolis and beyond. In addition, the results obtained from questionnaire on the effect of vehicular emission on human health show that on the average, 28.3%, 16.6%, 23.3%, 18.3%, 13.3% were respectively affected by sleeplessness, running nose, heavy eyes, asthmatic attack, and headache respectively. The location (distance from the coast type of fuel, availability of industries, and concentration of traffic) determine the impacts of these emissions on the ecosystem.


Keywords: Vehicular Emissions, Environmental, Pollution, illness, Survey, Lagos.



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