Removal of 137Cs from aqueous solutions using different cationic forms of a natural zeolite:: clinoptilolite

被引:151
作者
Abusafa, A [1 ]
Yücel, H [1 ]
机构
[1] Middle E Tech Univ, Dept Chem Engn, TR-06531 Ankara, Turkey
关键词
clinoptilolite; cesium; sorption isotherm; Dubinin-Radushkevich isotherm;
D O I
10.1016/S1383-5866(02)00042-4
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
Distribution coefficients of cesium on natural and cation-enriched (Na(+), K(+), NH(4)(+) and Ca(+2)) forms of clinoptilolite were measured by batch, radioactive tracer technique. The measurements were carried out for an initial cesium concentration range of 10(-6)-10(-1) mol/dm(3) and at temperatures of 25, 40, 60 and 80 degreesC. Experimental isotherms evaluated from distribution coefficients were fit to Langmuir, Freundlich and Dubinin-Radushkevich (D-R)models. Of the models tested, D-R model was found to represent the isotherms better in a wider range of concentrations than either Langmuir or Freundlich model. Breakthrough behavior of cesium on natural and cation-enriched forms of clinoptilolite for a particular set of conditions were also determined in a small size column. Column parameters were evaluated using mass transfer zone concept. (C) 2002 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:103 / 116
页数:14
相关论文
共 47 条
[1]   DIFFUSION IN ION-EXCHANGED CLINOPTILOLITES [J].
ACKLEY, MW ;
YANG, RT .
AICHE JOURNAL, 1991, 37 (11) :1645-1656
[2]   SORPTION OF U(VI) ON GRANITE [J].
AKSOYOGLU, S .
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY-ARTICLES, 1989, 134 (02) :393-403
[3]   Use of general purpose adsorption isotherms for heavy metal clay mineral interactions [J].
Altin, O ;
Ozbelge, HO ;
Dogu, T .
JOURNAL OF COLLOID AND INTERFACE SCIENCE, 1998, 198 (01) :130-140
[4]  
Ambruster T., 1993, AM MINERAL, V78, P260
[5]  
AMES LL, 1961, AM MINERAL, V46, P1120
[6]   SORPTION OF URANIUM AND CESIUM BY HANFORD BASALTS AND ASSOCIATED SECONDARY SMECTITE [J].
AMES, LL ;
MCGARRAH, JE ;
WALKER, BA ;
SALTER, PF .
CHEMICAL GEOLOGY, 1982, 35 (3-4) :205-225
[7]  
AMES LL, 1964, AM MINERAL, V49, P127
[8]  
AMES LL, 1960, AM MINERAL, V45, P689
[9]   STUDIES ON NATURAL CLINOPTILOLITES .1. HOMOIONIC CLINOPTILOLITES [J].
ARAYA, A ;
DYER, A .
JOURNAL OF INORGANIC & NUCLEAR CHEMISTRY, 1981, 43 (03) :589-594
[10]  
ARAYA A, 1981, J INORG NUCL CHEM, V43, P59