Adsorption behavior of IO-3 by CO23-- and NO-3-hydrotalcite

被引：68

作者：

Toraishi, T

Nagasaki, S

Tanaka, S

机构：

[1] Univ Tokyo, Grad Sch Engn, Dept Quantum Engn & Syst Sci, Bunkyo Ku, Tokyo 1138656, Japan

[2] Univ Tokyo, Grad Sch Frontier Sci, Inst Environm Studies, Bunkyo Ku, Tokyo 1138656, Japan

来源：

APPLIED CLAY SCIENCE | 2002年 / 22卷 / 1-2期

基金：

日本学术振兴会;

关键词：

hydrotalcite-type material; layered double hydroxide; adsorption; iodate;

D O I：

10.1016/S0169-1317(02)00108-4

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：

For the improvement of radioactive waste disposal, the materials with high adsorption capacity for IO3- should be used. Hydrotalcite-type (HT) compounds are considered potential materials. The adsorption behavior of IO3- by hydrotalcite-type compounds with CO3- (HTCO3) or NO3- (HTNO3) interlayer anions was studied. Adsorption equilibrium was reached more quickly for HTCO3 than for HTNO3. The adsorption isotherm for HTCO3 consisted of two Langmuir type adsorption processes. The desorption behavior was quite different for HTCO3-HTNO3. The results suggested that IO3- is adsorbed on the external surface of HTCO3 whereas IO3- is exchanged for interlayer NO3-. (C) 2002 Elsevier Science B.V All rights. reserved.

引用

页码：17 / 23

页数：7

共 21 条

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