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Fungal Leaching of Uranium from Low Grade Ore and its Waste Using Asp.Lentulus at Allouga Locality, Southwestern Sinai, Egypt |
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PP: 41-50 |
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doi:10.18576/jrna/070307
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Author(s) |
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Harpy N.M,
El Dabour, S.E,
Nada, A.A,
Sallam, A.M,
El Feky M.G,
El Aassy A.E,
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Abstract |
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| The capacity of the micro-organisms in ore transformations makes bioleaching technique a very interesting alternative to conventional processes. The ore sample is a prepared sample, typically like the sample in the original processing site for determining the behavior of uranium during processing by biotechnology (Asp.Lentulus) instead of conventional techniques in the ore sample and its resulting waste after processing. The bioleaching efficiency of Asp.Lentulus in the ore sample is lesser than its resulting residual due to its enrichment in organic matter and deficiency in sulphur content relative to waste. The investigated samples proved that the optimum conditions of uranium leaching are: 7 days incubation time for ore and 8 for waste, 3% pulp density, 30oC incubation temperature and pH 4. By applying the studied optimum conditions for uranium bioleaching from the investigated waste sample using Aspergillus Lentulus species on other waste samples rather than the studied one (samples W1, W2, W3 and W.4). The high bioleaching efficiency (reach up to 80.2%) in all waste samples, could be attributed to the presence of high sulphate contents in these samples that converted by the assistance of microorganisms into sulphuric acids, which increase the bioleaching efficiency. The fungal leaching technique demonstrated an adequate recovery of uranium with an efficient and cost-effective means from waste samples. This may help in reuse (reprocessing) of waste for environmental and economic purposes. |
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