Contrasting immobilization behavior of Cs+ and Sr2+ cations in a titanosilicate matrix
ETS-10 titanosilicate was tested as an adsorbent for the removal of Cs+ and Sr2+ cations from radioactive waters, considering both the ion exchange and the behaviour of the loaded adsorbent during thermal conditioning. The studies indicate that ETS-10 has a high and similar affinity for both Cs+ and...
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| Veröffentlicht in: | Journal of materials chemistry 2011, Vol.21 (11), p.3831-3837 |
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| container_title | Journal of materials chemistry |
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| creator | Pavel, Claudiu C. Walter, Marcus Pöml, Philipp Bouëxière, Daniel Popa, Karin |
| description | ETS-10 titanosilicate was tested as an adsorbent for the removal of Cs+ and Sr2+ cations from radioactive waters, considering both the ion exchange and the behaviour of the loaded adsorbent during thermal conditioning. The studies indicate that ETS-10 has a high and similar affinity for both Cs+ and Sr2+ cations reaching the ion exchange capacity of ETS-10 at a concentration of about 50 milliequivalents gram per liter. Thermal treatment of Cs+- and Sr2+-exchanged ETS-10 materials results in melting at approximately 700 [degree]C. The melting temperature increases with the initial Cs+ and Sr2+ concentration and is higher for Sr2+ than for Cs+ exchanged ETS-10. Recrystallisation occurs only in the presence of Sr2+ as evidenced by the exothermic effects between 800 and 900 [degree]C. After calcination of Cs+- and Sr2+-exchanged ETS-10 in air at 800 [degree]C, two types of materials were obtained: an amorphous glass material with homogeneous Cs+ distribution and a strontium fresnoites glass-ceramic material. |
| doi_str_mv | 10.1039/c0jm03135f |
| format | Article |
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The studies indicate that ETS-10 has a high and similar affinity for both Cs+ and Sr2+ cations reaching the ion exchange capacity of ETS-10 at a concentration of about 50 milliequivalents gram per liter. Thermal treatment of Cs+- and Sr2+-exchanged ETS-10 materials results in melting at approximately 700 [degree]C. The melting temperature increases with the initial Cs+ and Sr2+ concentration and is higher for Sr2+ than for Cs+ exchanged ETS-10. Recrystallisation occurs only in the presence of Sr2+ as evidenced by the exothermic effects between 800 and 900 [degree]C. 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| ispartof | Journal of materials chemistry, 2011, Vol.21 (11), p.3831-3837 |
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| language | eng |
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| source | Royal Society Of Chemistry Journals 2008-; Alma/SFX Local Collection |
| subjects | Adsorbents Affinity Cation exchanging Exchanging Glass ceramics Ion exchangers Melting Recrystallization |
| title | Contrasting immobilization behavior of Cs+ and Sr2+ cations in a titanosilicate matrix |
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