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Polymer cellulose triacetate membranes doped with 1-alkylimidazole as fixed carriers were applied for the investigation of the facilitated transport of Zn(II) and Mn(II) ions from an aqueous sulphate feed phase (c M = 0.001 mol/dm³). For the polymer inclusion membranes (PIMs) doped with 1-alkylimidazole (alkyl ⁻ from hexyl up to decyl), the following patterns of transport selectivity were found: Zn(II) &gt; Mn(II). The highest initial flux of Zn(II) ions (2.65 µmol/m²·s) was found for PIMs doped with 1-decyl-imidazole, whereas the best Zn(II)/Mn(II) selectivity coefficients equal to 19.7 were found for 1-hexyl-imidazole. Permeability coefficients for Zn(II) and Mn(II) ions transported across PIMs increase with an increase in the p K  a values of 1-alkylimidazole. The polymer membranes of cellulose triacetate- o -NPPE with 1-alkylimidazole were characterised by scanning electron microscopy, non-contact atomic force microscopy and thermal analysis techniques. The influence of membrane morphology on the Zn(II) and Mn(II) transport process was discussed.

polymers

The Application of Polymer Inclusion Membranes Based on CTA with 1-alkylimidazole for the Separation of Zinc(II) and Manganese(II) Ions from Aqueous Solutions