Distribution coefficient of cesium and cation exchange capacity of minerals and rocks.
- 1 January 1989
- journal article
- Published by Taylor & Francis in Journal of Nuclear Science and Technology
- Vol. 26 (12) , 1130-1135
- https://doi.org/10.3327/jnst.26.1130
Abstract
The sorption behavior of cesium on a variety of minerals and rocks has been investigated by batch equilibration using 137Cs. The distribution coefficient (Kd) of cesium increased with decreasing concentration of cesium and approached a constant value in dilute regions. The distribution coefficients determined at a trace level (Kdt,tr) differed more than four orders of magnitude strongly depending on the kinds of samples, for example, about 30 on quartz and 105 on tuffs. The values of Kd,tr are related to the cation exchange capacity (CEC; meq/g) determined from the saturated sorption of cesium for individual samples as : log Kd, tr =log CEC + constant. Most Kd, tr values were found to approximately follow this linear relationship.Keywords
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