The transition from nature to actinide extraction agents. A biomimetic approach to the development of new actinide (IV) extraction technologies
Conference
·
OSTI ID:560101
- Univ. of California, Berkeley, CA (United States)
Using siderophores (microbial iron chelating agents) as models, and the many chemical similarities between Fe(III) and Pu(IV), highly selective actinide (IV) sequestering agents have been prepared. These have included the functional groups found in siderophores (catecholate, hydroxamate, hydroxypyridonate). The selectivity of such agents is being used to develop new separation processes for metal cations. Inparticular, the treatment of nuclear waste at DOE`s Hanford, WA site presents many challenging separation problems. One of these is the separation of parts-per-million concentrations of the generally long-lived actinide isotopes from larger volumes of nonradioactive chemical waste. A series of solid-supported chelating resins and liquid/liquid extractants have been synthesized and characterized. The solid supports are based on derivatives of Merrifield`s peptide resin, and both types of extractants employ the hydroxypyridinone functionality. The background of this chemistry will be reviewed and a progress report presented.
- OSTI ID:
- 560101
- Report Number(s):
- CONF-970443--
- Country of Publication:
- United States
- Language:
- English
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