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Title: Effect of crown ethers on the ion-exchange behavior of alkaline earth metals. Toward improved ion-exchange methods for the separation and preconcentration of radium.

Abstract

The effect of selected crown ethers on the uptake of alkaline earth cations by sulfonic acid and diphosphonic acid-based cation-exchange resins from hydrochloric acid media is examined. The effect observed is shown to vary with the hydrophobicity of the crown ether. Water-soluble crown ethers enhance the sorption of certain cations, thereby improving the selectivity of the resin for other alkaline earths over calcium ion, an apparent result of a synergistic interaction between crown ether present in the resin phase and the ionic functional groups of the resin. In the presence of more hydrophobic crown ethers, a decrease in cation sorption is often observed, a result of the exclusion of the crown ether from the resin phase and the formation of cation-crown complexes in the solution phase. The result can be a reversal of the selectivity sequence ordinarily exhibited by the resin.

Authors:
; ; ; ; ; ;
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
ER
OSTI Identifier:
937959
Report Number(s):
ANL/CHM/JA-24761
TRN: US200905%%719
DOE Contract Number:  
DE-AC02-06CH11357
Resource Type:
Journal Article
Resource Relation:
Journal Name: Anal. Chem.; Journal Volume: 69; Journal Issue: 1997
Country of Publication:
United States
Language:
ENGLISH
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; ALKALINE EARTH METALS; CALCIUM IONS; CATIONS; CROWN ETHERS; FUNCTIONALS; HYDROCHLORIC ACID; ION EXCHANGE; RADIUM; RESINS; SORPTION; SULFONIC ACIDS

Citation Formats

Dietz, M. L., Chiarizia, R., Horwitz, E. P., Bartsch, R. A., Talanov, V., Chemistry, and Texas Tech Univ. Effect of crown ethers on the ion-exchange behavior of alkaline earth metals. Toward improved ion-exchange methods for the separation and preconcentration of radium.. United States: N. p., 1997. Web. doi:10.1021/ac9700437.
Dietz, M. L., Chiarizia, R., Horwitz, E. P., Bartsch, R. A., Talanov, V., Chemistry, & Texas Tech Univ. Effect of crown ethers on the ion-exchange behavior of alkaline earth metals. Toward improved ion-exchange methods for the separation and preconcentration of radium.. United States. doi:10.1021/ac9700437.
Dietz, M. L., Chiarizia, R., Horwitz, E. P., Bartsch, R. A., Talanov, V., Chemistry, and Texas Tech Univ. Wed . "Effect of crown ethers on the ion-exchange behavior of alkaline earth metals. Toward improved ion-exchange methods for the separation and preconcentration of radium.". United States. doi:10.1021/ac9700437.
@article{osti_937959,
title = {Effect of crown ethers on the ion-exchange behavior of alkaline earth metals. Toward improved ion-exchange methods for the separation and preconcentration of radium.},
author = {Dietz, M. L. and Chiarizia, R. and Horwitz, E. P. and Bartsch, R. A. and Talanov, V. and Chemistry and Texas Tech Univ.},
abstractNote = {The effect of selected crown ethers on the uptake of alkaline earth cations by sulfonic acid and diphosphonic acid-based cation-exchange resins from hydrochloric acid media is examined. The effect observed is shown to vary with the hydrophobicity of the crown ether. Water-soluble crown ethers enhance the sorption of certain cations, thereby improving the selectivity of the resin for other alkaline earths over calcium ion, an apparent result of a synergistic interaction between crown ether present in the resin phase and the ionic functional groups of the resin. In the presence of more hydrophobic crown ethers, a decrease in cation sorption is often observed, a result of the exclusion of the crown ether from the resin phase and the formation of cation-crown complexes in the solution phase. The result can be a reversal of the selectivity sequence ordinarily exhibited by the resin.},
doi = {10.1021/ac9700437},
journal = {Anal. Chem.},
number = 1997,
volume = 69,
place = {United States},
year = {Wed Jan 01 00:00:00 EST 1997},
month = {Wed Jan 01 00:00:00 EST 1997}
}