Abstract
ABSTRACT Recovery of uranium from the raffinate stream of uranium extraction plant (UNRS) has been investigated with TBP/dodecane–NaHCO3 system using hollow fiber dispersion liquid membrane with the objective of polishing of streams and recycle/safe disposal of effluent water. A mathematical model has been developed to predict the transport of uranium through Dispersed Liquid Membrane (DLM) configuration in hollow fiber contactor. The model predicts the rate of change of concentration in the aqueous feed phase fl owing through the lumens in recirculating mode. It takes into account concentration change during flow along the lumen, complexation reaction at the aqueous–organic interface at the pore-entrance of lumen and diffusive transport through aqueous and organic films. The equilibrium distribution data for U(VI) for various extractant concentrations and various strippants have been generated, with independent experiments using real raffinate stream. Also, the mass-transfer resistances at the aqueous an...
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