gamma. -zirconium phosphate as a Cs-waste form for partitioned wastes
Conference
·
· Mater. Res. Soc. Symp. Proc.; (United States)
OSTI ID:5962602
..gamma..-zirconium phosphate (..gamma..-ZrP), ..gamma..-Zr(HPO/sub 4/)/sub 2/ . 2H/sub 2/O is an extremely selective cesium ion sieve for nuclear waste solutions. Because of its layer structure, the adsorbed Cs can be directly fixed in ..gamma..-ZrP by collapsing the layers upon heat treatment. Fixation of 96 and 98% of the adsorbed Cs was achieved by simple heat treatment at 350/sup 0/C and 600/sup 0/C respectively. Thus, heat treatment of this ..gamma..-ZrP leads to a good radiophase with good leach resistance. Cs sorbed ..gamma..-ZrP can also be converted to CsZr/sub 2/(PO/sub 4/)/sub 3/ (sodium zirconium phosphate (NZP) radiophase) by sintering with ammonium monobasic phosphate and zirconyl nitrate at about 850/sup 0/C. Thus, ..gamma..-ZrP serves as a precursor to CsZr/sub 2/(PO/sub 4/)/sub 3/ radiophase which has comparable leach resistance to other phases under consideration for radio-Cs immobilization.
- Research Organization:
- Pennsylvania State Univ., University Park
- OSTI ID:
- 5962602
- Report Number(s):
- CONF-821107-Pt.1
- Conference Information:
- Journal Name: Mater. Res. Soc. Symp. Proc.; (United States) Journal Volume: 15
- 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
36 MATERIALS SCIENCE
360603 -- Materials-- Properties
360604 -- Materials-- Corrosion
Erosion
& Degradation
ADSORPTION
ALKALI METALS
CESIUM
DATA
DISSOLUTION
ELEMENTS
EXPERIMENTAL DATA
HEAT TREATMENTS
INFORMATION
ION EXCHANGE
LEACHING
MANAGEMENT
MATERIALS
MATRIX MATERIALS
METALS
NUMERICAL DATA
OXYGEN COMPOUNDS
PHOSPHATES
PHOSPHORUS COMPOUNDS
PROCESSING
RADIOACTIVE WASTE PROCESSING
SEPARATION PROCESSES
SORPTION
TRANSITION ELEMENT COMPOUNDS
WASTE MANAGEMENT
WASTE PROCESSING
ZIRCONIUM COMPOUNDS
ZIRCONIUM PHOSPHATES
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
36 MATERIALS SCIENCE
360603 -- Materials-- Properties
360604 -- Materials-- Corrosion
Erosion
& Degradation
ADSORPTION
ALKALI METALS
CESIUM
DATA
DISSOLUTION
ELEMENTS
EXPERIMENTAL DATA
HEAT TREATMENTS
INFORMATION
ION EXCHANGE
LEACHING
MANAGEMENT
MATERIALS
MATRIX MATERIALS
METALS
NUMERICAL DATA
OXYGEN COMPOUNDS
PHOSPHATES
PHOSPHORUS COMPOUNDS
PROCESSING
RADIOACTIVE WASTE PROCESSING
SEPARATION PROCESSES
SORPTION
TRANSITION ELEMENT COMPOUNDS
WASTE MANAGEMENT
WASTE PROCESSING
ZIRCONIUM COMPOUNDS
ZIRCONIUM PHOSPHATES