TY - JOUR
T1 - Anion transport through polymer inclusion membranes facilitated by transition metal containing carriers
AU - Gardner, Joseph S.
AU - Peterson, Quinn P.
AU - Walker, Jedediah O.
AU - Jensen, Bryce D.
AU - Adhikary, Bibhutosh
AU - Harrison, Roger G.
AU - Lamb, John D.
N1 - Funding Information:
We thank Brigham Young University for financial support.
Copyright:
Copyright 2008 Elsevier B.V., All rights reserved.
PY - 2006/6/1
Y1 - 2006/6/1
N2 - New polymer inclusion membrane (PIM) carriers to facilitate membrane transport of anions have been prepared consisting of bis(pyridylmethyl)amine compounds coordinated to transition metal ions (Fe3+, Cu2+, Zn2+). One of the carriers is based on a resorcinarene bonded to four bis(pyridylmethyl)amines. These carriers have been included in cellulose triacetate (CTA) based PIMs to study competitive transport among halides (F-, Cl-, Br-, I-) and oxoanions (SO42-, SeO42-, NO3- and ReO4-). Several compounds, tris(2-butoxyethyl) phosphate, dibutyl phthalate and ethylbenzoate, ethyl phthalyl ethyl glycolate and benzoic acid 2-ethoxyethyl ester, were used as plasticizers in the membranes to provide solubility of the metal carrier complexes. Separations were performed with and without antiport anions. Permeabilities of oxoanions increased with the use of 0.05 M KCl as an antiport solution. In some cases, Cl- was selectively transported over F-, Br- and I- in contradiction to the usual Hoffmeister-based selectivities. Excellent ReO4- transport over NO3-, SO42- and SeO42- was observed for certain systems. Permselectivity for ReO4-/NO3- was 312 for a PIM using ethyl phthalyl ethyl glycolate as plasticizer, zinc complex as carrier and an antiport solution of 0.05 M KCl.
AB - New polymer inclusion membrane (PIM) carriers to facilitate membrane transport of anions have been prepared consisting of bis(pyridylmethyl)amine compounds coordinated to transition metal ions (Fe3+, Cu2+, Zn2+). One of the carriers is based on a resorcinarene bonded to four bis(pyridylmethyl)amines. These carriers have been included in cellulose triacetate (CTA) based PIMs to study competitive transport among halides (F-, Cl-, Br-, I-) and oxoanions (SO42-, SeO42-, NO3- and ReO4-). Several compounds, tris(2-butoxyethyl) phosphate, dibutyl phthalate and ethylbenzoate, ethyl phthalyl ethyl glycolate and benzoic acid 2-ethoxyethyl ester, were used as plasticizers in the membranes to provide solubility of the metal carrier complexes. Separations were performed with and without antiport anions. Permeabilities of oxoanions increased with the use of 0.05 M KCl as an antiport solution. In some cases, Cl- was selectively transported over F-, Br- and I- in contradiction to the usual Hoffmeister-based selectivities. Excellent ReO4- transport over NO3-, SO42- and SeO42- was observed for certain systems. Permselectivity for ReO4-/NO3- was 312 for a PIM using ethyl phthalyl ethyl glycolate as plasticizer, zinc complex as carrier and an antiport solution of 0.05 M KCl.
KW - Anion transport
KW - Facilitated transport
KW - Plasticizer
KW - Polymer inclusion membranes
KW - Resorcinarene
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U2 - 10.1016/j.memsci.2005.10.026
DO - 10.1016/j.memsci.2005.10.026
M3 - Article
AN - SCOPUS:33646445478
SN - 0376-7388
VL - 277
SP - 165
EP - 176
JO - Journal of Membrane Science
JF - Journal of Membrane Science
IS - 1-2
ER -