Fixation of radioactive waste by hydrothermal reactions with clays
Description
A means of converting high-level radioactive waste containing sodium salts to solid, relatively insoluble aluminosilicate minerals, is described. Powdered aluminum silicate clays such as kaolin or bentonite are allowed to react with caustic, aqueous solutions of the waste at temperatures in the range of 300 to 1000C. The reaction product from nitrate-containing wastes is a salt-filled, sodium aluminosilicate with the framework structure of cancrinite. Radioactive cesium and strontium are trapped in cancrinite along with sodium salts. The cancrinite crystals are spheres approximately 0.5 μm in diameter and are clustered. Leaching of the powdered product with distilled water at 300C gives bulk leach rates in the range of 10-7 to 10-9 g of sample/cm2-day based on BET surface areas
Additional details
Publishing Information
- Publisher
- American Chemical Society.
- Imprint Place
- Washington, DC
- Imprint Title
- High-level radioactive waste management
- Imprint Pagination
- p. 108-125.
Conference
- Title
- 167. national meeting of the American Chemical Society.
- Dates
- 31 Mar 1974.
- Place
- Los Angeles, California, USA.
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 8328578
- Subject category
- S12: MANAGEMENT OF RADIOACTIVE WASTES, AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES;
- Resource subtype / Literary indicator
- Conference
- Descriptors DEI
- ALUMINIUM SILICATES; BENTONITE; CLAYS; KAOLIN; LEACHING; RADIOACTIVE WASTE PROCESSING; RADIOACTIVE WASTES; SOLIDIFICATION
- Descriptors DEC
- ALUMINIUM COMPOUNDS; DISSOLUTION; INORGANIC ION EXCHANGERS; ION EXCHANGE MATERIALS; MANAGEMENT; MINERALS; OXYGEN COMPOUNDS; RADIOACTIVE MATERIALS; SEPARATION PROCESSES; SILICATES; SILICON COMPOUNDS; WASTE MANAGEMENT; WASTE PROCESSING; WASTES
Optional Information
- Notes
- Imprint:See CONF-740349--P3.