SORPTION BEHAVIOR OF URANIUM AND THORIUM ON CRYPTOMELANE-TYPE HYDROUS MANGANESE-DIOXIDE FROM AQUEOUS-SOLUTION

被引：14
|
作者：
ELNAGGAR, IM
ELABSY, MA
ABDELHAMID, MM
ALY, HF
机构：
[1] Hot laboratory Centre, Atomic Energy Authority, Post code 13759, Cairo
来源：
SOLVENT EXTRACTION AND ION EXCHANGE | 1993年 / 11卷 / 03期
关键词：
D O I：
10.1080/07366299308918171
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
The kinetics of sorption of uranium and thorium from aqueous nitrate solutions on cryptomelane-type hydrous manganese dioxide (CRYMO) vas studied. The exchange of uranium is particle diffusion controlled while that of thorium is chemical reaction at the exchange sites. Sorption of uranium and thorium by CRYMO has been also studied as a function of metal concentrations and temperature. The sorption of both cations is found to be an endothermic process and increases markedly with temperature between 30 and 60-degrees-C. The sorption results have been analysed by the langmuir adsorption isotherm over the entire range of uranium and thorium concentrations investigated.
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页码：521 / 540
页数：20
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