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

Polymers

Elzbieta Radzyminska-Lenarcik¹  Malgorzata Ulewicz² 

[1] Faculty of Chemical Technology and Engineering, UTP University of Science and Technology, PL85326 Bydgoszcz, Poland;Faculty of Civil Engineering, Czestochowa University of Technology, PL42201 Czestochowa, Poland;

关键词: polymer inclusion membrane;    1-alkylimidazole;    zinc(II);    manganese(II);    AFM;    SEM;   

DOI  :  10.3390/polym11020242

来源: DOAJ

【 摘 要 】

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) > 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 pK_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.

【 授权许可】

Unknown