Transport of metal ions across polymer inclusion membrane with 1-alkylimidazole

• Autorzy: Ulewicz M. , Radzymińska-Lenarcik E.

Warianty tytułu

PL

Transport jonów metali przez polimerową membranę inkluzyjną z 1 alkiloimidazolem

• Języki publikacji: EN

Abstrakty

EN

The facilitated transport of copper(II), zinc(II), cobalt(II), and nickel(II) ions across polymer inclusion membranes (PIMs), which consist of cellulose triacetate as polymeric support, o-nitrophenyl pentyl ether as plasticizer and 1-alkylimidazole as ion carrier was reported. PIM was characterized by using atomic force microscopy (AFM) technique. The results show that Cu2+ can be separated very effectively from others heavy and transition metal cations as Zn2+, Co2+, and Ni2+ (at concentration of 10-3 M each). Alkyl substituents in position 1 of imidazole ring have an effect on hydrophobic properties and the initial flux of the transported metal ions. Also, the influence of the chloride ions concentration on the separation process was investigated. To explain the mechanism of membrane transport the diffusion of metal ions complexes with 1-alkylimidazole was also measured.

PL

Zbadano selektywność transportu jonów Cu(II), Zn(II), Co(II) i Ni(II) (cMe=0,001M, każdy) przez polimerowe membrany inkluzyjne składające się z trójoctanu celulozy (suportu), eteru o-nitrofenylooktylu (plastyfikatora) i przenośnika jonów (1 alkiloimidazole). Polimerowa membrana została scharakteryzowana przy pomocy mikroskopii sił atomowych (AFM). Wykazano, że podstawnik alkilowy w pozycji 1 pierścienia imidazolu zmieniając własności hydrofobowe przenośnika wpływa na strumień początkowy transportu jonów metali. Wartości strumienia początkowego transportu jonów przy użyciu przenośnika 1 i 2 maleją w szeregu: Cu(II) > Zn(II) > Co(II) > Ni(II), natomiast dla 3 - 5 w szeregu: Cu(II) > Zn(II) > Ni(II), Co(II). Strumień transportu Cu(II) wzrasta w szeregu użytych przenośników: 1 < 2 < 3 < 4 ɝ, osiągając najwyższą wartość 6,36 µµmol/m2 · s (dla 5). Na selektywność transportu wpływ również stężenie jonów chlorkowych w fazie zasilającej. Czynnikiem limitującym szybkości transportu Cu2+ przez PIM jest współczynnik dyfuzji kompleksu przenoszonego kationu przez membranę.

Słowa kluczowe

EN

polymer inclusion membrane (PIM); ions separation; copper(II); zinc(II); nickel(II); cobalt(II); 1-alkylimidazole

PL

polimerowa membrana inkluzyjna; separacja jonów; miedź(II); cynk(II); nikiel(II); kobalt(II); 1-alkiloimidazol

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Physicochemical Problems of Mineral Processing
• Rocznik: 2011
• Tom: Vol. 46
• Strony: 119--130
• Opis fizyczny: Bibliogr. 26 poz.

Twórcy

autor

Ulewicz M.

autor

Radzymińska-Lenarcik E.

• Department of Metal Extraction and Recirculation, Czestochowa University of Technology, 42-200 Częstochowa, Armii Krajowej 19,

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