Retention of Cs on zeolite, bentonite and their mixtures

被引:34
作者
Atun, G [1 ]
Bodur, N
机构
[1] Univ Istanbul, Fac Engn, Dept Chem, TR-34850 Istanbul, Turkey
[2] Cekmece Nucl Res & Training Ctr, TR-34481 Istanbul, Turkey
关键词
D O I
10.1023/A:1019658011221
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
The sorption behavior of cesium on zeolite and bentonite minerals and their mixtures was studied by means of a batch method and a tracer technique. All experiments were carried out in the presence of CsCl spiked with Cs-137 and NaCl as a supporting electrolyte in varying concentrations. The distribution coefficients (K) did not show significant differences at low Cs+ loadings while they decreased in the high loading region. Freundlich and D-R isotherms were applied to the adsorption data of zeolite and bentonite. Adsorption capacities and mean energies calculated from D-R isotherm parameters decreased by increasing ionic strength on both minerals. The identification of the specific uptake sites was attempted on the basis of the Freundlich isotherm. Experimentally observed distribution coefficients of Cs on two mineral mixtures were smaller than theoretically calculated values, except at the highest NaCl concentration.
引用
收藏
页码:275 / 279
页数:5
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