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Title: New materials for strontium removal from nuclear waste streams
Author: Savva, Savvaki N.
ISNI:       0000 0004 5923 8988
Awarding Body: University of Birmingham
Current Institution: University of Birmingham
Date of Award: 2016
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The primary aim of this project is to investigate potential new materials for application in ion exchange processes to remove \(^9\)\(^0\)Sr from nuclear waste streams. This work can be broadly split in to two sections, work on attempts to synthesise new materials and work to investigate ion exchange properties of two recently prepared materials AV-7, a synthetic analogue of tin-kostylvite and AV-3, a synthetic analogue of petarasite. Synthesis on new materials was focused on metal silicate materials, in particular titanium, zirconium and tin silicates containing exchangeable group I and II cations. These synthesis attempts initially were focus on targeted mineral phases such as noonkanbahite, BaKNaTi\(_2\)(Si\(_4\)O\(_1\)\(_2\))O\(_2\), followed by a series of brief surveys examining the effects of various changes to precursor gels such as concentration of bases such as NaOH, metal to silicon ratios and the presence of mineralizing agents such as sodium fluoride. The synthesis of two synthetic mineral phases potentially interesting for ion exchange is also reported here, titanite and fresnoite. Ion exchange studies focused mainly on AV-7 and AV-3 but also included well known ion exchange materials for comparison such as clinoptilolite and Nb-doped crystalline silicotitanate and brief investigations in to the ion exchange of fresnoite and titanite. Ion exchange was followed using X-Ray fluorescence, ion chromatography and radioactive \(^8\)\(^5\)Sr exchanges measured using scintillation counters.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available
Keywords: GE Environmental Sciences ; QD Chemistry