A new model was proposed for mass transport through liquid surfactant membrane in the recovery of uranium from the wet process phosphoric acid. The synergistic combined extractant of di（2-ethylhexyl） phosphoric acid (D₂EHPA) plus trioctylphosphine oxide (TOPO) was used as a carrier in the W/O/W system. The stripping of uranium, described by using an effective mass transfer coefficient, was considered as a rate controlling step together with the diffusion of uranium complex across the membrane. The breakage of emulsion in the W/O/W system has also been considered in this model.
Consequently, the predicted result by the present model was found to be in fairly good agreement with the experimental result.