COUPLED TRANSPORT OF COPPER THROUGH DIFFERENT COMMERCIAL SUPPORTS CONTAINING LIX-984 AS CARRIER

The coupled transport of copper(II) ions through a supported liquid me mbrane containing LIX 984 as the mobile carrier dissolved in kerosene has been studied. Many commercial membrane supports were investigated at different stirrer speeds in a permeation cell. An equation describi ng the permeation rate has been derived, taking into account stagnant layer aqueous diffusion and liquid membrane diffusion. By means of thi s treatment the copper overall transfer resistance and the experimenta l determination of the effective porosity factor (epsilon/tau), for ea ch support have been performed. The Accurel(R) 2E-PP membrane showed a relatively high value of epsilon/tau (0.91), which makes this membran e an adequate support when the transport properties of the supported l iquid membrane are concerned. (C) 1998 SCI.