Kinetics of uranium leaching process using sulfuric acid for Wadi Nasib ore, South western Sinai, Egypt | ||||
Aswan University Journal of Environmental Studies | ||||
Article 5, Volume 1, Issue 2, December 2020, Page 171-182 PDF (506.57 K) | ||||
Document Type: Original Research | ||||
DOI: 10.21608/aujes.2020.127584 | ||||
View on SCiNiTO | ||||
Authors | ||||
S.A. Zakia 1; M.M. Rashad1; S.A. Mohamed2; E.M. EL sheikh1; H.E. Mira1; G.M. Abd el Wahab1 | ||||
1Nuclear Materials Authority, P.O. Box 530 El Maadi, Cairo, Egypt | ||||
2Chemistry Department, Faculty of Science, Menofiya University | ||||
Abstract | ||||
The leaching of uranium from Wadi Nasib ore using sulfuric acid solution has been studied. The effect of different parameters such as leaching time, sulfuric acid concentration, solid/liquid ratio, leaching temperature and mechanical stirring speed were investigated in order to optimize various process parameters for maximizing the recovery of uranium. Uranium dissolution efficiency of 98.5% was obtained for Wadi Nasib ore after 4 hours contact time leaching using 200 g L-1 H2SO4 and solid/liquid ratio 1/4 at leaching temperature 80°C and 400 rpm mechanical stirring speed without any oxidant addition. The kinetic data showed that the leaching process can be described by a shrinking-core model with apparent activation energy equals to 16.2 kJ/mol. The low activation energy supported the findings that the Wadi Nasib leaching rate is controlled by diffusion-controlled process. | ||||
Keywords | ||||
Kinetic; Leaching; Uranium Ore; Sulfuric Acid; Diffusion Control | ||||
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