PIXE Analysis for Elemental Composition and Concentrations of Tantalite Samples from Oke-Ogun, Oyo State, Nigeria
Keywords:
PIXE analysis, Elemental composition, Tantalite, Concentration, Mining sitesAbstract
The elemental composition and concentrations of heavy metals in solid mineral may be a reflection of their economic value and their effects on the environment. Tantalite samples from Oke-Ogun were subjected to elemental analysis using Particle Induced X-ray Emission (PIXE) technique. Twelve samples of tantalite ore [(Fe, Mn) Ta2O6], were obtained from the mining sites. 500 mg of the pulverized samples were pelletized for their elemental composition and concentrations using the PIXE technique. The total number of elements found in the selected (Komu, Eluku, Gbedu and Sepenteri) falls within the range of 16 ̶ 27 elements. Na, Mg, Si, S, K, Ca, Ti, Cr, Mn, Fe, Ni, Zn, As, Sr, Zr, Nb, Ta, W, Bi, Pb. V, P, Mo, Hf, Al, and Rb were reported for the study. Harmful elements like Pb, Cr, As, Zn and Sr were found in samples from the sites with concentrations in the range of (240 ̶ 3000) ppm which is greater than the limits specified by the abundance elements in average crustal rock (2 ̶ 311) ppm. The range of tantalite concentrations in all the sites falls within the range of (111,000 ̶ 370,000) ppm and comparing the range with tantalite samples from other nations reveals that the tantalite from the selected sites are more enriched in tantalite content and by inference will be more of economic values than those from compared nations.
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