Kinetics of leaching process of Uranium from EL-Missikat shear zone Eastern Desert, EGYPT
Moussa, M., Daher, A., Omar, S., Khawassek, Y., Haggag, E., Gawad, E. (2014). Kinetics of leaching process of Uranium from EL-Missikat shear zone Eastern Desert, EGYPT. EKB Journal Management System, 1(2), 65-75. doi: 10.21608/jbes.2014.369573
M. A. Moussa; A. M. Daher; S. A. Omar; Y. M. Khawassek; E. A. Haggag; E.A. Gawad. "Kinetics of leaching process of Uranium from EL-Missikat shear zone Eastern Desert, EGYPT". EKB Journal Management System, 1, 2, 2014, 65-75. doi: 10.21608/jbes.2014.369573
Moussa, M., Daher, A., Omar, S., Khawassek, Y., Haggag, E., Gawad, E. (2014). 'Kinetics of leaching process of Uranium from EL-Missikat shear zone Eastern Desert, EGYPT', EKB Journal Management System, 1(2), pp. 65-75. doi: 10.21608/jbes.2014.369573
Moussa, M., Daher, A., Omar, S., Khawassek, Y., Haggag, E., Gawad, E. Kinetics of leaching process of Uranium from EL-Missikat shear zone Eastern Desert, EGYPT. EKB Journal Management System, 2014; 1(2): 65-75. doi: 10.21608/jbes.2014.369573

Kinetics of leaching process of Uranium from EL-Missikat shear zone Eastern Desert, EGYPT

Journal of Basic and Environmental Sciences
Volume 1, Issue 2, April 2014, Pages 65-75    PDF (667.51 K)
Document Type: Original Article
DOI: 10.21608/jbes.2014.369573
Authors
M. A. Moussa1; A. M. Daher2; S. A. Omar2; Y. M. Khawassek2; E. A. Haggag2; E.A. Gawad2
1Chemistry Department, Faculty of Science, Benha University, Egypt
2Nuclear Materials Authority, P.O. Box 530, El Maadi, Cairo, Egypt
Abstract
The leaching process of uranium- REE ore from El-Missikat in a sulfuric 
acid solution using hydrogen peroxide as an oxidant was investigated. 
The leaching condition temperature, hydrogen peroxide concentration, 
sulfuric acid concentration, contact time, particle size, solid-liquid ratio 
and agitation rate were studied. The optimum process operating 
parameters were: ore particle size 74 µm; sulfuric acid concentration 2.5 
M; contact time 240 min; solid-liquid ratio 1:2; H2O2 concentration 0.5 
M and agitation rate 600 rpm at temperature 25°C. The leaching
efficiency of REE was about 70%, while the uranium leaching efficiency 
was about 95%. The experimental data were well interpreted with a 
shrinking core model with diffusion control through a porous product 
layer. The leaching process follows the kinetic model: 
1-3 (1-X) 2/3 + 2 (1-X) = k1t with an apparent activation energy of 13.16 
kJ/mole.
Keywords
Leaching; Uranium; REE; Shrinking core model; Kinetics; Diffusion
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