Abstract
Uranium extraction from sulfate leach liquor acid by D(2)EHPA and TOPO mixture in kerosene was investigated. The effect of different factors affecting the extraction mechanism such as sulfate leach liquor acid, D(2)EHPA and TOPO concentrations and temperature have been studied. The mathematical treatment for the obtained date suggested that the composition of synergistic extraction species is (UO2(D)(2)T). The logarithm of the apparent equilibrium constant, log Kex, of synergistic extraction reaction has been evaluated, to be 3.35 +/- A 0.1. The effect of temperature on extraction process was investigated and the apparent values of the thermodynamics parameters (a dagger H, a dagger G and a dagger S) were 38.2 kJ/mol, -19.1 kJ/mol and 192.5 J/mol respectively.