Facilitated transport of lead ion across a bulk liquid membrane by three calix[4]arene derivatives, as ion carriers, dissolved in CHCl3 has been investigated. Transport kinetics of lead ion using calix[4]arene derivatives carriers in liquid membrane have been briefly discussed. The influences of fundamental parameters affecting the transport of lead ion including ion carrier concentration in the membrane phase, stirring speed of membrane, time of transport have been studied. Transport of lead ion occured almost quantitatively while using bromo-calix[4]arene or thioether-calix[4]arene as ion carriers. The kinetic model used in this article can describe the transport kinetic mechanism of lead ion.

Key words: calix[4]arene derivative, liquid membrane transport, lead ion, kinetics of transport