Journal of Membrane Science, Vol.177, No.1-2, 41-47, 2000
Carrier-mediated transport of toxic elements through liquid membranes - Transport of Cd(II) from high salinity chloride medium through supported liquid membrane containing TBP/cyclohexane
The transport of divalent cadmium ions from high salinity chloride medium through SLM containing TBP in cyclohexane supported on cellulose acetate membrane into a strip solution with EDTA has been studied. Permeability coefficients of metal ions increased with increasing the pH of feed from 1-4. It also increases with increasing membrane and strip concentrations. At higher concentrations of TBP in the membrane, metal transport was faster, further increase in TBP concentrations up to 80-100% (v/v), the metal transport slowed down. The effect of temperature has been studied and the activation energy of the reactions has been evaluated to be 48 kcal/mol, which suggested that this process is chemical reaction controlled under the hydrodynamic conditions.