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Immobilization of cesium in alkaline activated fly ash matrix

被引：79
作者：
Fernandez-Jimenez, A
Macphee, DE
Lachowski, EE
Palomo, A
机构：
[1] CSIC, Inst Eduardo Torroja, Madrid 28033, Spain
[2] Univ Aberdeen, Dept Chem, Old Aberdeen AB24 3UE, Scotland
来源：
JOURNAL OF NUCLEAR MATERIALS | 2005年 / 346卷 / 2-3期
关键词：
D O I：
10.1016/j.jnucmat.2005.06.006
中图分类号：
T [工业技术];
学科分类号：
08 [工学];
摘要：
The immobilization potential of alkaline activated fly ash (AAFA) matrices for cesium has been investigated. The presence of Cs in the AAFA pastes, prepared using 8M NaOH solution as activator, showed no significant adverse effects on mechanical strength or microstructure, nor were significant quantities of Cs leached following application of the Toxic Characteristic Leaching Procedure (TCLP) and American Nuclear Society (ANS) 16.1 leaching protocols. Microstructural analysis shows Cs associated with the main reaction product in the AAFA suggesting that cesium is chemically bound rather than physically encapsulated. It is proposed that cesium is incorporated into the alkaline aluminosilicate gel, a precursor for zeolite formation. (c) 2005 Elsevier B.V. All rights reserved.
引用
收藏
页码：185 / 193
页数：9
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