Assessment of environmental impact of open burning of scrap tyres on ambient air quality |
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| Authors: | L A Jimoda I D Sulaymon A O Alade G A Adebayo |
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| Institution: | 1.Environmental Engineering Research Laboratory, Department of Chemical Engineering,Ladoke Akintola University of Technology,Ogbomoso,Nigeria;2.Bioenvironmental, Water and Engineering Research Unit (BWERU), Department of Chemical Engineering,Ladoke Akintola University of Technology,Ogbomoso,Nigeria;3.Science and Engineering Research Group (SAERG),Ladoke Akintola University of Technology,Ogbomoso,Nigeria |
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| Abstract: | Open burning of scrap (bicycle, motorcycle, car and truck) tyres (OBST) was simulated in the laboratory to investigate their impact on the ambient air quality. The tyre samples were burnt in combustion chamber, and gaseous pollutants (CO, NO2 and SO2) emitted were quantified, while concentrations and elemental compositions of emitted total suspended particulates (TSP) were determined. Emission level of SO2 from all the tyre samples exceeded USEPA allowable (156.74 µg/m3) limit. CO due to car and truck tyres exceeded USEPA allowable (10,285.71 µg/m3) limit, while NO2 concentration was below the allowable limit (56.33 µg/m3) only in bicycle tyre. 25% of all the gaseous pollutants emitted are within the Air Quality Index range of 101–150. TSP concentrations from all the tyre samples were higher than the Federal Ministry of Environment standard (250 µg/m3) for ambient TSP. There is strong correlation (R) of 0.885, 0.949 and 0.802 among all the gaseous (CO/NO2, CO/SO2 and NO2/SO2) pollutants, respectively, while the highest (0.999) and lowest (0.079) positive correlations were observed between Mg and Mn as well as Cd and Zn, respectively. The results of this study show that OBST emits hazardous pollutants, which pose serious threat to human health and environment. |
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