Quantification of traffic-related heavy metal pollution in soils and plants: a case of Ilorin-Ibadan road, Nigeria
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Date
2015
Journal Title
Journal ISSN
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Publisher
Journal of Ghana Science Association
Abstract
The increased use of vehicles coupled with lack of emission standards have increased the deposition of traffic-related metals in the environment. This study quantified heavy metals concentrations in soils and plants in relation to distances from Ilorin-Ibadan road, in order to determine the contributions of vehicular emissions to the environmental pollution status. Soil and plant samples were collected at 2 m and 5 m distances from the road at Eyenkorin, Ogbomosho, Iwo and Olodo. The collected soil and plant samples were analysed for Zn, Pb, Cd, Cr, Ni and Cu concentrations
using standard methods. Results showed that Pb was higher than Ni, Cr, Cu, Cd and Zn in the soil. Differences between metals concentrations at 2 m and 5 m distances from the road was inconsistent. The highest total concentrations of soil Zn (11.57 μg.g-1) and Pb (45.98 μg.g-1) were in Iwo
and Ogbomosho respectively. Eyenkorin had the highest total concentrations of Cd (17.10 μg.g-1),Cr (10. 23 μg.g-1), Ni (15.95 μg.g-1) and Cu (12.59 μg.g-1). Total Zn, Pb and Cr contents in the sampled plant at Ogbomosho were highest. Plant samples from Eyenkorin and Iwo had the highest Ni
(1.95 μg.g-1) and Cu (2.07 μg.g-1) contents respectively. The levels of Zn and Cu in the plants were within the permissible limits. The correlation of plant Ni concentrations with soil Pb, Cd, Ni and Cu concentrations could serve as tool to ascertain the levels of these metals in the soil. Ilorin-
Ibadan road thus reflect varying degree of heavy metals contamination.
Description
Oyedeji, S., Ogunkunle, C.O., Isamotu, T.T. & Fatoba, P.O. (2015). Quantification of traffic-related heavy metal pollution in soils and plants: a case of Ilorin-Ibadan road, Nigeria. Journal of Ghana Science Association, 16(1): 109-119,
Keywords
contamination, environment, heavy metal, roadside, soil
Citation
Oyedeji, S., Ogunkunle, C.O., Isamotu, T.T. & Fatoba, P.O. (2015). Quantification of traffic-related heavy metal pollution in soils and plants: a case of Ilorin-Ibadan road, Nigeria. Journal of Ghana Science Association, 16(1): 109-119