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, Pages 171-182 PDF (506.57 K) | ||
| Document Type: Original Research | ||
| DOI: 10.21608/aujes.2020.127584 | ||
| 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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