Utilization of AAS and GIS Tools in Assessment of Distribution of Pb, Cd, Cr and Mn Concentrations Within Top-Soil of An Automobile Workshop Within University College Hospital, Ibadan, Nigeria

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International Journal of Research and Innovation in Social Science (IJRISS) | Volume V, Issue III, March 2020 | ISSN 2454–6186

Utilization of AAS and GIS Tools in Assessment of Distribution of Pb, Cd, Cr and Mn Concentrations Within Top-Soil of An Automobile Workshop Within University College Hospital, Ibadan, Nigeria

 AFOLAYAN Adedotun Onoyinka*1, 2, POPOOLA Shola Caleb1
1National Open University of Nigeria (Ibadan Study Centre)
2Tissue Culture Unit, Biotechnology Department, National Centre for Genetic Resources and Biotechnology, P.M.B. 5382, Moor Plantation, Apata, Ibadan, Nigeria
*Correspondence Author

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Abstract: – Increased frequency of acquisition and use of automobiles have required the establishment of repair workshop in different parts of most cityin developing countries. Apart from the vehicular emission, which is a major route of environmental pollution; the different waste materials generated in most of these auto-fixer workshops has contributed widely to environmental contamination and pollution with heavy metals. This study was designed and carried out to ascertain distribution and degree of pollution of selected heavy metals: Pb, Cd, Cr and Mn within an automobile workshop located at University college Hospital, Ibadan. The concentrations of Pb, Cd, Cr and Mn in top soil samples from this workshop were determined using Atomic Absorption Spectrophotometry (AAS). The mean concentrations of each of these heavy metals within the topsoil samples were 235.13mgPbkg-1, 5.28mgCdkg-1, 45.96mgCrkg-1 and 411.23mgMnkg-1 respectively and the abundance of the metals within the workshop’stop soil follows the order: Mn>>Pb>>Cr>Cd. Overall, the mean concentrations of Pb and Cd measured within the workshop’stop soil samples exceeded Standard Regulatory limits. ArcGIS software was employed in producing the geochemical maps. The Quantification of Contamination (QoC) analysis showed that Pb, Cd, Cr and Mn have anthropogenic source of contamination and the contamination factor values for Cd, Pb and Mnindicated values greater than 6. This study shows that the concentration and distribution of Pb, Cd, Cr and Mn within the study area soils correlates directly to activities originating from the automobile repair workshops. Consequently, these top soils overloaded with noxious metals will pose a health risk to the inhabiting populace of the area surrounding the workshop.
Keywords: Automobile workshop, Contamination, Top Soil, Heavy metals, AAS, ArcGIS