Assessment of the Physicochemical Characteristics and Potentially Toxic Metals in Soils at Agbara Industrial Estate, Ogun State, Nigeria

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C. Onwordi et al.

Abstract

This study investigated the impact of industrial activities on the physicochemical characteristics and potentially toxic metals (PTMs) of the soil samples around Agbara Industrial Estate, south-western Nigeria. The pH, organic matter, mechanical properties (% sand, % clay and % slit) and PTMs (Ni, Co, Cu, Fe, Pb, Cr and Cd) of the surface soil samples were determined using standard methods. Pollution was assessed by the contamination factor (CF), pollution load index (PLI), and geoaccumulation index (Igeo). The results showed that the pH and organic matter ranged from 5.98–6.24 and 2.12–4.01, respectively. The soil samples were sandy and the concentrations (mg/kg) of the PTMs were Ni (5.89 ± 0.84); Co (4.34 ± 1.00); Cu (9.86 ± 0.89); Fe (14100 ± 2500); Pb (14.4 ± 2.00); Cr (19.1 ± 1.80) and Cd (0.84 ± 0.30). The levels of Ni, Co, Cu, Fe and Cd in the samples were significantly different to those of the control soil. The CF revealed moderate contaminations for Ni, Pb and Cd while the other metals had low contaminations. PLI < 1 indicated a baseline of pollution of the metals and the Igeo suggested no pollution to moderate pollution of the metals.


The soil samples in and around the Industrial Estate were moderately contaminated as a result of the industrial activities therein and could pose a serious threat to humans and the environment.

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How to Cite
Onwordi et al., C. (2018). Assessment of the Physicochemical Characteristics and Potentially Toxic Metals in Soils at Agbara Industrial Estate, Ogun State, Nigeria. Journal of Scientific Research and Development, 17(1), 1-8. Retrieved from http://jsrd.unilag.edu.ng/article/view/30
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