期刊
POLYMERS
卷 11, 期 2, 页码 -出版社
MDPI
DOI: 10.3390/polym11020242
关键词
polymer inclusion membrane; 1-alkylimidazole; zinc(II); manganese(II); AFM; SEM
资金
- Ministry of Science and Higher Education Republic of Poland [BS 13/2013]
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/dm(3)). 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 mu mol/m(2).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.
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