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Sorption, Desorption, and Isotope Exchange of Cesium (10−9-10−3 M) On Chlorite

Published online by Cambridge University Press:  02 April 2024

A. Grütter ,
H. R. von Gunten  and
E. Rössler
A. Grütter
Affiliation:
Eidgenössisches Institut für Reaktorforschung, CH-5303 Würenlingen, Switzerland
H. R. von Gunten*
Affiliation:
Eidgenössisches Institut für Reaktorforschung, CH-5303 Würenlingen, Switzerland
E. Rössler
Affiliation:
Eidgenössisches Institut für Reaktorforschung, CH-5303 Würenlingen, Switzerland
*
1Laboratorium für Radiochemie, Universität Bern, CH-3000 Bern 9, Switzerland.
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Abstract

Batch cation-exchange experiments were performed on chlorite, using synthetic ground water containing cesium in the concentration range 10−9–10−3 M. The sorption behavior was complex; with increasing Cs concentration, the distribution ratio of Cs decreased at first, but passed through a pronounced maximum at high Cs loadings. The desorption data differed from the sorption data only by a shift towards larger distribution ratios in the region of the maximum. The distribution ratios for isotope exchange were even larger, but varied less with Cs loadings. Similar results were obtained for KCl-treated chlorite; however, grinding or acid-treatment of the chlorite considerably altered its behavior, the absence of the maximum being the most striking change. Most of the effects at higher Cs loadings can be explained by postulating structural changes induced by the sorption of Cs.

Keywords

Acid treatmentCation exchangeCesiumChloriteIsotope exchangeSorption
Type
Research Article
Information
Clays and Clay Minerals , Volume 34 , Issue 6 , December 1986 , pp. 677 - 680
Copyright
Copyright © 1986, The Clay Minerals Society

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