ASSESSMENT OF THE SPATIO - TEMPORAL VARIATIONS OF VEHICULAR EMISSION AND AIR QUALITY IN MINNA, NIGER STATE, NIGERIA

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Date
2015-09
Authors
ONAOLAPO, Emmanuel Opeyemi
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Abstract
This study assessed the level of some selected air pollutants which are largely products of internal combustion in motor vehicle engines namely: nitrogen dioxide (NO2), sulphur dioxide (SO2) and carbon monoxide (CO) in Minna. Number of vehicles were counted at morning, afternoon and evening time while Crowcon (Tetra 3) model number IECEx BAS 05.0059 was used for monitoring the concentrations of the three gases at the selected motorways which were labelled X and Z. The point X represented road intersections where samples were obtained within the metropolis (urban Area namely Top Medical junction, Kpakungu Roundabout, and Obasanjo Complex Roundabout), while point Z is the control station which is situated at the Government residential area ideal for less traffic flow in the city. Traffic volume ranged between 1775±06 at the various sampling points. The concentrations of CO, SO2 and NO2 ranged between 51.05±0.04 ppm, 0.119±0.017ppm and 0.115±0.029ppm respectively, they were found to exceed the stipulated threshold by Federal Ministry of Environment. Significant relationship (p< 0.05) was established between the volume of traffic and the concentrations of the sampled gases across the periods of the day at the selected motorways. There is also a significant difference (p< 0.05) between the sampled gases in the urban centre and the control point. Hence, traffic volume accounted for 30.5ppm, 38ppm, 20ppm of CO concentrations in the Morning, Afternoon and Evening respectively. 0.029ppm, 0.082ppm and 0.076ppm of NO2 concentrations in the Morning, Afternoon and Evening respectively. While 0.119ppm, 0.093ppm and 0.084ppm of SO2 concentrations were measured in the Morning, Afternoon and Evening respectively along the selected motorways. Urgent precaution that seeks to minimize the level of emission of pollutants from automobile is required in Minna to protect the teeming population especially road users against the adverse impacts of these pollutants.
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A THESIS SUBMITTED TO THE SCHOOL OF POST GRADUATE STUDIES, AHMADU BELLO UNIVERSITY, ZARIA NIGERIA, IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE AWARD OF THE DEGREE OF MASTER OF SCIENCE IN ENVIRONMENTAL MANAGEMENT DEPARTMENT OF GEOGRAPHY FACULTY OF SCIENCE AHMADU BELLO UNIVERSITY, ZARIA
Keywords
ASSESSMENT,, SPATIO - TEMPORAL VARIATIONS,, VEHICULAR EMISSION,, AIR QUALITY,, MINNA,, NIGER STATE,, NIGERIA
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