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Journal of Applied Sciences
Year: 2007  |  Volume: 7  |  Issue: 4  |  Page No.: 527 - 530

Determination of Pollutant Levels in Mario Jose Tannery Effluents from Kano Metropolis, Nigeria

J.C. Akan, E.A. Moses and V.O. Ogugbuaja    

Abstract: The uncontrolled releases of waste effluents to large water bodies have deleterious effects both on water quality and aquatic life. Kano, an industrial city in Nigeria has the largest number of tanneries in the country is facing the problems of impairment of water quality. Levels of heavy metals (Cu, Co, Zn, Mn, Pb, Fe and Cr) were determined using Atomic Absorption spectrophotometric methods. pH, Redox potential (Eh), Temperature, Dissolve Oxygen (DO), Total Dissolve Solid, sulphate, nitrate and phosphate were also determined. Results showed high levels of Cr (2.70±0.57 to 3.12±0.69 mg L-1), Fe (1.21±0.13 to 1.61±0.41 mg L-1) and these values were found to be significantly higher than the maximum permissible limits of FEPA (p<0.05). Levels of Mn, Cu, Zn, Pb and Co were within the minimum permissible limits for effluent discharged into rivers. Increases, in concentrations of heavy metals with distance from point source up to a distance of 400 metres were observed. While anion concentration decreased with distance from point source up to a distance of 400 m. Adherence to pollution control measures and effluent pre-treatment should be enforced in the industries.

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