CHED 860 |
| Melissa M Galloway, Aaron J. Celestian, John B. Parise, Abraham Clearfield, and Houston P. Perry. |
| Safe long term nuclear waste storage is an important environmental concern since the contents of waste tanks produce high gamma, beta and heat radiation which need to be immobilized or reduced. An ion selective absorptive material is required to reduce the radiation in the solution. The crystalline silicotitanate (CST) materials used for this study selectively sequester the Sr2+ and Cs+ cations even in the presence of high concentrations of competing ions such as Na+ and H+. This research focused on the phase stability of H+ and Na+ forms of CST as a function of temperature. The effect of dehydration and recrystallization was studied over the temperature range 35°C-900°C over 90 minutes. The Na+ form of the CST was found to undergo several structure changes after the transition of an amorphous phase, while the H+ form of the CST lost crystallinity under intense heating and did not recrystallize. |
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Undergraduate Research Poster Session: Environmental Chemistry
2:00 PM-4:00 PM, Monday, 27 March 2006 Georgia World Congress Center -- Ex. Hall B4, Poster
Division of Chemical Education |