Heavy metal pollution around Itakpe mine, Kogi State, Nigeria

International Journal of Physical Sciences

Kakulu Samuel¹ 

关键词: Mine;    heavy metals;    tailings;    pollution;    agricultural soil.;   

DOI  :  10.5897/IJPS12.282

学科分类：物理（综合）

来源: Academic Journals

【 摘 要 】

The removal of largequantities of overburden through mining has resulted in the pollution of various ecosystems.Soil pollution around the Itakpe mine in Kogi State, Nigeria was studied through the determination of heavy metal concentration and chemical speciation of the metals cadmium (Cd), copper (Cu), magnesium (Mg), nickel (Ni), lead (Pb) and zinc (Zn) in soilusingFlame Atomic Absorption Spectroscopy. Soil digestion was done with hydrofluoric-perchloric (HF-HClO4) acid mixture (5:1) and sequential extraction was carried out with different reagents in the extraction steps; Exchangeable, bound to carbonates, bound to Fe-Mn oxides, bound to organic matter and residual. Mean metal content of mining site soil is 0.16±0.02, 0.15±0.03, 0.04±0.02, 0.11±0.02, 0.07±0.01 and 0.04±0.03mg/g forCd, Cu, Mg, Ni, Pb and Zn, respectively. Results of sequential extraction of the mining site soil show that the highest metallic levels were observed in the Fe-Mn, organic and residual fractions.

【 授权许可】

CC BY