Synthesis and sorption behaviour of some radioactive nuclides on sodium titanate as cation exchanger

被引：26

作者：

El-Naggar, IM ^{[1
]}

Mowafy, EA ^{[1
]}

Ali, IM ^{[1
]}

Aly, HF ^{[1
]}

机构：

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

来源：

ADSORPTION-JOURNAL OF THE INTERNATIONAL ADSORPTION SOCIETY | 2002年 / 8卷 / 03期

关键词：

sodium titanate; cation exchanger; sorption; radioactive nuclides;

D O I：

10.1023/A:1021212617839

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：

Crystalline (Na4TiO4.0.32H(2)O) and amorphous (Na2TiO3.1.45H(2)O) forms of sodium titanate were prepared by fusion reaction of TiO2 and Na2CO3 at 1100degreesC in molar ratios of 2:1 and 1:2, respectively. The prepared products were characterized using IR, DTA-TG, X-ray and elemental analyses. Kinetic studies of the order of reaction (n) and activation energy (Ea) for crystallization transformation step (for crystalline sodium titanate only) have been determined from DTA thermogram and their values were found to be 0.87 (univalent order) and 3.97 kJ mol(-1), respectively. Ion exchange capacities and some distribution studies were carried out at different conditions in the presence of some complexing agents (EDTA, boric and citric acids) and the results showed that the capacities of the crystalline form are always less than the amorphous one.

引用

页码：225 / 234

页数：10

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