Абстрактный

Kinetics of extraction process of uranium from El-Missikat mineralized shear zone, Eastern Desert, Egypt

E.A.Gawad

The extraction process of uraniumfromEl-Missikat by anion exchange resin (LewatitMonoPlusM500) was investigated. The extraction condition contact time, temperature, pregnant feed pH, resin/ leach liquor ratio and agitation rate were studied. The optimum process operating parameters were pH of 1.8; contact time 30min.; Resin-leach liquor ratio (R/L) 1:50 and agitation rate 200 rpmat temperature 25°C. The extraction efficiency of uranium was about 95%. The experimental data were well interpreted with a shrinking core model with surface diffusion control. The extraction, process follows the kineticmodel: 1-(1-Xf) 2/3 = kap with an apparent activation energy of 20.1 kJ/mole.