Actinide removal from waste solutions by ferrite treatment
Conference
·
OSTI ID:6494557
In laboratory tests, ferrite treatment was effective in removing actinides from Rocky Flats process waste. Plutonium concentrations were consistently lowered from over 10/sup -4/ g/l to the 10/sup -7/ to 10/sup -8/ g/l range. At the same time, 3.2 to 3.6 g/l solids were produced as compared to 15.7 g/1 observed over a recent 16-month period for waste treatment by flocculant precipitation. Whereas ferrite treatment required only one treatment step, at least two treatment steps are needed for flocculant precipitation to achieve the same results. Greater loadings of ferrite in a cement matrix were obtained so that very significant weight and volume reduction in immobilized solid TRU waste were observed. In addition to its effectiveness in actinide removal, ferrite waste treatment has shown considerable versatility, which would facilitate its application to a variety of waste media. There are two treatment to be used in different chemical environments. Whereas the in situ method is affected by the presence of other metal ions, the preformed ferrite addition technique is much less sensitive to the chemistry of the waste medium. Because of their strongly magnetic nature, ferrite solids can be separated magnetically in addition to techniques such as filtration and centrifugation.
- Research Organization:
- Rockwell International Corp., Golden, CO (USA). Rocky Flats Plant
- DOE Contract Number:
- AC04-76DP03533
- OSTI ID:
- 6494557
- Report Number(s):
- RFP-3492; CONF-830205-12; ON: DE83007536
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
052001* -- Nuclear Fuels-- Waste Processing
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
ACTINIDES
ALPHA-BEARING WASTES
AMERICIUM
ELEMENTS
FERRIMAGNETIC MATERIALS
FERRITES
IRON COMPOUNDS
LIQUID WASTES
MAGNETIC MATERIALS
MANAGEMENT
MATERIALS
METALS
OXYGEN COMPOUNDS
PLUTONIUM
PROCESSING
RADIOACTIVE MATERIALS
RADIOACTIVE WASTE PROCESSING
RADIOACTIVE WASTES
REMOVAL
SOLIDS
TRANSITION ELEMENT COMPOUNDS
TRANSPLUTONIUM ELEMENTS
TRANSURANIUM ELEMENTS
WASTE MANAGEMENT
WASTE PROCESSING
WASTES
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
ACTINIDES
ALPHA-BEARING WASTES
AMERICIUM
ELEMENTS
FERRIMAGNETIC MATERIALS
FERRITES
IRON COMPOUNDS
LIQUID WASTES
MAGNETIC MATERIALS
MANAGEMENT
MATERIALS
METALS
OXYGEN COMPOUNDS
PLUTONIUM
PROCESSING
RADIOACTIVE MATERIALS
RADIOACTIVE WASTE PROCESSING
RADIOACTIVE WASTES
REMOVAL
SOLIDS
TRANSITION ELEMENT COMPOUNDS
TRANSPLUTONIUM ELEMENTS
TRANSURANIUM ELEMENTS
WASTE MANAGEMENT
WASTE PROCESSING
WASTES