Effect of pH on the destruction of complexants with ozone in Hanford nuclear waste
Chemical processing of nuclear waste at Hanford has generated some waste solutions with high concentration (0.1 to 0.5M) of N-(hydroxyethyl)-ethylenediaminetriacetic acid (HEDTA), ethylenediaminetetraacetic acid (EDTA), and other organic complexing agents. These complexants must be destroyed bacause they affect radionuclide migration in soils, waste concentration, radionuclide removal, and other waste storage and processing considerations. Previous studies on actual waste solutions demonstrated that preozonation of the alkaline waste significantly improved radionuclide removal. A series of bench-scale experiments using synthetic waste has been performed to determine the optimum pH for most efficient ozone destruction of EDTA. Ozonation of EDTA in synthetic waste was carried out over the pH range of 1 to 14. Potential catalytic materials were examined at different pH levels. The EDTA-ozone reaction rates and stoichiometric requirements were compared and evaluated for the varying conditions.
- Research Organization:
- Rockwell International Corp., Richland, WA (USA). Energy Systems Group
- DOE Contract Number:
- AC06-77RL01030
- OSTI ID:
- 6075895
- Report Number(s):
- RHO-SA-203; CONF-8106119-2; ON: DE81029493; TRN: 81-015885
- Resource Relation:
- Conference: Northwest regional American Chemical Society meeting, Bozeman, MT, USA, 17 Jun 1981
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
EDTA
OXIDATION
HIGH-LEVEL RADIOACTIVE WASTES
OZONE
CHEMICAL REACTION KINETICS
RADIOACTIVE WASTE PROCESSING
ION EXCHANGE
BENCH-SCALE EXPERIMENTS
CATALYSTS
EXPERIMENTAL DATA
FLOWSHEETS
HANFORD RESERVATION
HEDTA
LIQUID WASTES
PH VALUE
SIMULATION
AMINO ACIDS
CARBOXYLIC ACIDS
CHELATING AGENTS
CHEMICAL REACTIONS
DATA
DIAGRAMS
HYDROXY ACIDS
INFORMATION
KINETICS
MANAGEMENT
MATERIALS
NATIONAL ORGANIZATIONS
NUMERICAL DATA
ORGANIC ACIDS
ORGANIC COMPOUNDS
PROCESSING
RADIOACTIVE MATERIALS
RADIOACTIVE WASTES
REACTION KINETICS
US DOE
US ERDA
US ORGANIZATIONS
WASTE MANAGEMENT
WASTE PROCESSING
WASTES
052001* - Nuclear Fuels- Waste Processing