We have developed a new, simple, and efficient supported liquid membrane technique for solvent extraction of Lu(III)
from the aqueous feed solution and simultaneous re-extraction in the acidic stripping solution, based on closed-loop
recirculation of aqueous phases through a U-shaped hollow fiber contactor. The removal and extraction efficiencies of
Lu(III) increased as the donor flow rate increased, while the memory effect was independent of the donor flow rate. The
accumulation of Lu-DEHPA complex within the organic phase immobilized in the membrane pores was