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Alkali aluminosilicate geopolymers as binders to encapsulate strontium-selective titanate ion-exchangers
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Title: | Alkali aluminosilicate geopolymers as binders to encapsulate strontium-selective titanate ion-exchangers |
Authors: | Ke, Xinyuan Browse this author | Bernal, Susan A. Browse this author | Sato, Tsutomu Browse this author →KAKEN DB | Provis, John L. Browse this author |
Issue Date: | 22-Jul-2019 |
Publisher: | Royal Society of Chemistry |
Journal Title: | Dalton Transactions |
Volume: | 48 |
Issue: | 32 |
Start Page: | 12116 |
End Page: | 12126 |
Publisher DOI: | 10.1039/C9DT02108F |
PMID: | 31328757 |
Abstract: | Alkali-activated metakaolin geopolymers are attracting interest in the conditioning of nuclear wastes, especially for their ability to immobilise cationic species. However, there is limited understanding of the chemical interactions between the encapsulated spent ion-exchangers, used for decontaminating waste water, and the host aluminosilicate matrix. The lack of such understanding makes it difficult to predict the long-term stability of the waste form. In this study, the suitability of using metakaolin based geopolymer as a matrix for encapsulation of titanate-type ion-exchangers loaded with non-radioactive Sr was investigated for the first time, via spectroscopic and microstructural inspection of the encapsulated ion-exchangers and the aluminosilicate gel matrix. The microstructural and chemical properties of metakaolin geopolymers remained stable after encapsulating titanate type spent ion-exchangers, performed desirably as host materials for conditioning of Sr-loaded titanate ion-exchangers. |
Rights: | https://creativecommons.org/licenses/by/3.0/ |
Type: | article |
URI: | http://hdl.handle.net/2115/81926 |
Appears in Collections: | 工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 佐藤 努
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