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.
| Original language | English |
|---|---|
| Pages (from-to) | 12116-12126 |
| Number of pages | 11 |
| Journal | Dalton Transactions |
| Volume | 48 |
| Issue number | 32 |
| Early online date | 22 Jul 2019 |
| DOIs | |
| Publication status | Published - 28 Aug 2019 |
ASJC Scopus subject areas
- Inorganic Chemistry
Cite this
Alkali aluminosilicate geopolymers as binders to encapsulate strontium-selective titanate ion-exchangers. / Ke, Xinyuan; Bernal, Susan A.; Sato, Tsutomu; Provis, John L.
In: Dalton Transactions, Vol. 48, No. 32, 28.08.2019, p. 12116-12126.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Alkali aluminosilicate geopolymers as binders to encapsulate strontium-selective titanate ion-exchangers
AU - Ke, Xinyuan
AU - Bernal, Susan A.
AU - Sato, Tsutomu
AU - Provis, John L.
PY - 2019/8/28
Y1 - 2019/8/28
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=85070748705&partnerID=8YFLogxK
U2 - 10.1039/c9dt02108f
DO - 10.1039/c9dt02108f
M3 - Article
VL - 48
SP - 12116
EP - 12126
JO - Dalton Transactions
JF - Dalton Transactions
SN - 1477-9226
IS - 32
ER -