Diffusion mechanism of Cs+, Zn2+ and E3+ ions in the particles of zirconium titanate ion exchanger using radioactive tracers

被引：20

作者：

Abou-Mesalam, MM ^{[1
]}

El-Naggar, IM ^{[1
]}

机构：

[1] Atom Energy Author, Hot Labs Ctr, Cairo, Egypt

来源：

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS | 2003年 / 215卷 / 1-3期

关键词：

particle diffusion; ion exchange; zirconium titanate; activation energy; entropy;

D O I：

10.1016/S0927-7757(02)00443-0

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Diffusion behaviour of Cs+, Zn2+ and Eu3+ ion exchange on zirconium titanate (ZrTi) were studied under particle diffusion conditions and the limited batch technique. The values of the diffusion coefficients, activation energy and the entropy of activation were calculated and compared with those obtained for other inorganic and organic resins. The values of the obtained effective diffusion coefficient were found to increase in the order Cs+ > Zn2+ > Eu3+. The activation energy was found to decrease with decreases in the entropy of the activation of the system. From all the data obtained it is anticipated that the above mentioned cations are exchanged with H- of ZrTi in the unhydrated form. (C) 2002 Published by Elsevier Science B.V.

引用

页码：205 / 211

页数：7

共 29 条

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