| Autor: |
Clearfield, Abraham, Medvedev, Dmitry G., Kerlegon, Steven, Bosser, Timothy, Burns, Jonathan D., Jackson, Milton |
| Předmět: |
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| Zdroj: |
Solvent Extraction & Ion Exchange; May/Jun2012, Vol. 30 Issue 3, p229-243, 15p, 1 Black and White Photograph, 3 Diagrams, 6 Charts, 5 Graphs |
| Abstrakt: |
The compound sodium titanium silicate, popularly known as CST, is highly selective for Cs+. It was synthesized for the purpose of removing 137Cs from basic nuclear waste systems. This compound has a tunnel structure in which the Cs+ ion just fits but diffusion through the tunnels is relatively slow. CST loses its ability to sequester Cs+ in the strongly basic nuclear waste solutions. However, replacement of titanium with 25 mol% of niobium increases the selectivity to a satisfactory level. It has been found that producing a less crystalline form of Nb-CST greatly improves the rate of Cs+ removal. Additionally, the non-niobium CST is selective for strontium both as Sr2+ and Sr(OH)+. It is suggested that both radioisotopes of cesium and strontium may be efficiently extracted by a combination of a mixture of poorly crystalline CST and Nb-CST. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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