Decontamination of a radioactive waste liquid by electrodialysis
An apparatus is described for the removal and recovery of acidic and radioactive components of a liquid waste stream comprising in combination a series of at least two electrodialysis units or stacks. Each stack is comprised of a cathode chamber at one terminal end, and an anode chamber at the opposite terminal end. The chambers contain respectively a cathode and anode electrode. A deacidification stack is the first stack in the series having all of its chambers being separated one from the other by separate anion selective membranes defining between the electrode chambers at least one neutral liquid chamber positioned adjacent to the cathode chamber. A primary desalting stack is the second stack in the series comprising a multi-chamber unit having alternating salt diluting and salt concentrating chambers defined by alternating cation and anion selective membranes, means for introducing a liquid to be treated into the cathode chamber of the deacidification stack with exit means for withdrawal of the liquid, and means for passing the withdrawn liquid into and out of the salt diluting chambers of the primary desalting stack. A means is included for introducing a liquid into and out of the concentrating and electrode chambers of the primary desalting stack and for passing a direct electric current transversely across the membranes and chambers of each stack in the series.
- Assignee:
- Ionics, Inc., Watertown, MA
- Patent Number(s):
- US 4645625
- OSTI ID:
- 6745841
- Resource Relation:
- Patent File Date: Filed date 26 Nov 1984
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
HIGH-LEVEL RADIOACTIVE WASTES
ELECTRODIALYSIS
ANIONS
ANODES
CATHODES
CATIONS
DESALINATION
DILUTION
DIRECT CURRENT
LIQUID WASTES
MEMBRANES
RADIOACTIVE WASTE PROCESSING
STACKS
CHARGED PARTICLES
CURRENTS
DEMINERALIZATION
DIALYSIS
ELECTRIC CURRENTS
ELECTRODES
IONS
MANAGEMENT
MATERIALS
PROCESSING
RADIOACTIVE MATERIALS
RADIOACTIVE WASTES
SEPARATION PROCESSES
WASTE MANAGEMENT
WASTE PROCESSING
WASTES
052001* - Nuclear Fuels- Waste Processing