Supertetrahedral Framework

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Description: Background: The removal of certain ions from spent fuel sources can be beneficial in the reprocessing or long-term storage of these fuels. Previous compounds used in these types of ion exchange applications were based on anionic structures since cationic structures physically broke down when larger ions were exchanged. Technology: A new compound developed by researchers will have a significant impact on the processing of spent nuclear fuels. A compound effective in removing pertechnetate (TcO4-) and chromate (CrO4(2-)) ions has been developed. Both ions are problems during the vitrification of nuclear waste; the former leaches from the waste into the environment and the latter leads to the formation of spinels weakening the glass structure. These ions are common in waste from nuclear weapons processing and advanced nuclear fuel cycles. Advantages: Channel structure as well as geometry lead to target ion uptake Simple and scalable preparation techniques Cationic structure remains intact during anion exchange Low temperature (200°C) manufacture process Rapid uptake of pertechnetate ions