It is pointed out in this paper that the kinetic model of metal ions transporting through a Bulk Liquid Membrane is : A→Ai==B==Ci→C. where A, B, C represents the metal ion in feed, organic membrane and strip respectively; the subscript i represents the interface. The controlling process is the diffusion in boundary surface. Three parameters (k1, kx, kp) are obtained from the correlation between the experimental data and the kinetic equation. The value of kp is the partition ratio. The larger the kp value is, the samller the amount of metal ions remains in the organic phase.

Key words: METAL ION