Title: Dispersion modelling of emissions from vehicles along the urban section of a major highway

Authors: Gabriel Ayodele Adebayo; Jacob Ademola Sonibare; Lukuman Adekilekun Jimoda; Ishaq Dimeji Sulaymon

Addresses: Environmental Engineering Research Laboratory, Department of Chemical Engineering, Ladoke Akintola University of Technology, P.M.B. 4000, Ogbomoso, Nigeria ' Environmental Engineering Research Laboratory, Department of Chemical Engineering, Obafemi Awolowo University, Ile-Ife, Nigeria ' Environmental Engineering Research Laboratory, Department of Chemical Engineering, Ladoke Akintola University of Technology, P.M.B. 4000, Ogbomoso, Nigeria ' Environmental Engineering Research Laboratory, Department of Chemical Engineering, Ladoke Akintola University of Technology, P.M.B. 4000, Ogbomoso, Nigeria

Abstract: Vehicular emissions portend high risk to human health especially to inhabitants of highway environment. However, there is paucity of information on the inventory of air pollutants on Nigerian highways. Therefore, this study aimed at estimating the ground level concentrations of emissions associated with road traffic in the Ogbomoso-section of Ibadan-Ilorin highway. Three sampling locations (Idi-oro, General and Aroje) were selected within the Ogbomoso section of Ibadan-Ilorin highway for this study. Data collections on criteria air pollutants [carbon monoxide (CO), nitrogen monoxide (NO) and sulphur dioxide (SO2)] and total suspended particle (TSP) were made within dry and wet seasons. The results of predicted concentrations of CO, NO, SO2 and TSP ranged between 0.59-352.60, 0.28-213.40, 0.04-33.40 and 0.02-14.20 µg/m3, respectively. All the predicted concentration values of selected pollutants meet-up with the regulatory standards. This study has provided baseline inventory for criteria air pollutants in the Ogbomoso-section of Ibadan-Ilorin highway.

Keywords: dispersion modelling; AERMOD; road traffic; carbon monoxide; nitrogen monoxide; sulphur dioxide; total suspended particulates.

DOI: 10.1504/IJEE.2016.085511

International Journal of Environmental Engineering, 2016 Vol.8 No.4, pp.298 - 308

Received: 15 Dec 2016
Accepted: 21 Apr 2017

Published online: 28 Jul 2017 *

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