Assessment of Lead (Pb) in Soil at Various Distances and Depths at Pb and Zn Mining Site in Ishiagu, Ebonyi State, Nigeria

Atikpo E.1,* and Ihimekpen M. O.2

1 Department of Civil and Environmental Engineering, Faculty of Engineering, Delta State University, Oleh Campus, Delta State, Nigeria
2 Department of Civil Engineering, Faculty of Engineering, University of Benin, Benin City, Edo State, Nigeria

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 Vol. 4 No. 2  | October 2020 | Pages 463 – 472



Pb in soil at various distance and depths was assessed at Pb and Zn mining site in Ishiagu Ebonyi State, Nigeria to determine the furthest distance travelled so far and the concentration at the distance. Pb ion in sampled soils at depth 0-10, 10-20, 20-30, 30-40 and 40-50 cm within pollution zones in 1 km x 1 km area of 100 m grid intervals were fitted with mathematical models for prediction using MATLAB. Pb ion change with distance was fitted into power model and linear polynomial models at distinct grid points. The models predictions showed decrease in Pb ion with distance. It revealed that the ion had travelled far into the soil with a furthest distance of 4760 cm but with no soil pollution signal because 64.54 mg/kg (concentration at 4760 cm) is less than 100 mg/kg specified as the maximum for soils. It showed a signal that the metal might threaten the ground water at some future date with an objectionable concentration above 0.01 mg/l specified for drinking water. Concentration at some intermediate distances is risk signal of food pollution through absorption of the metal by crops with root morphology and depth reaching these intermediate depths of objectionable concentration.

Keywords: Soils, Lead, Pollution Threat, Prediction

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Cite this article as:

Atikpo E. and Ihimekpen M. O., 2020. Assessment of lead (Pb) in soil at various distance and depths at Pb and Zn mining site in Ishiagu, Ebonyi State, Nigeria. Nigerian Journal of Environmental Sciences and Technology, 4(2), pp. 463-472.