Search results for: A. Gimba

Authors: R. A. Saleh, A. Gimba, A. Adeleke, A. Usman

Abstract:

One fossil fuel used to generate electricity is coal, a nonrenewable energy source. Despite its utility, many individuals steer avoid coal, often overlooking its significance. Notably, coal is considered to contain notable amounts of rare metals, which serve as basic materials in the production of renewable energy. The occurrence of rare metals in Garin Maiganga Coal Deposit was analyzed using ICP-OES (Inductively Coupled Plasma Optical Emission Spectrometry), 16 rare metals were determined in the coal: cesium (Cs), gold, platinum, osmium, iridium, palladium, ruthenium, rhodium, tellurium, rhenium, indium, tantalum, tungsten, gallium, lithium, and cobalt. The results indicated the occurrence of Cs in all three decarbonized coal ash samples. The objective of this study is to expand the data necessary for initiating metal recovery experiments. The focus is on using ICP-OES to measure the concentration of these metals in Garin Maiganga coal resource in Gombe, Nigeria. In order to do this, the contents of rare metals were detected, and the economic values of the elements were explored.

Keywords: Coal, Maiganga, rare metals, ICP-OES.

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Authors: E. D. Paul, H. Otanwa, O. F. Paul, A. J. Salifu, J. E. Toryila, C. E. Gimba

Abstract:

The concentration levels of six heavy metals (Cd, Cr, Fe, Ni, Pb and Zn) and two mineral elements (Ca and Mg) were determined in soil samples collected from the vicinity of two auto mechanic workshops in Sabon-Gari, Kaduna state, Nigeria, using Atomic Absorption Spectrometry (AAS), in order to compare the gradation of their concentrations with distance and depth of soil from the workshop sites. At site 1, concentrations of Lead, Chromium, Iron and Zinc were generally found to be above the World Health Organization limits, while those of Nickel and Cadmium fell within the limits. Iron had the highest concentration with a range of 176.274 ppm to 489.127 ppm at depths of 5 cm to 15 cm and a distance range of 5 m to 15 m, while the concentration of cadmium was least with a range of 0.001 ppm to 0.008 ppm at similar depth and distance ranges. In addition, there was more of calcium (11.521 ppm to 121.709 ppm), in all the samples, than magnesium (11.293 ppm to 21.635 ppm). Similar results were obtained for site II. The concentrations of all the metals analyzed showed a downward gradient with increase in depth and distance from both workshop sites except for iron and zinc at site 2. The immediate and remote implications of these findings on the biota are discussed.

Keywords: AAS, Heavy Metals, Mechanic Workshops, Soils.

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