Process for producing zeolite adsorbent and process for treating radioactive liquid waste with the zeolite adsorbent
Zeolite is contacted with an aqueous solution containing at least one of copper, nickel, cobalt, manganese and zinc salts, preferably copper and nickel salts, particularly preferably copper salt, in such a form as sulfate, nitrate, or chloride, thereby adsorbing the metal on the zeolite in its pores by ion exchange, then the zeolite is treated with a water-soluble ferrocyanide compound, for example, potassium ferrocyanide, thereby forming metal ferrocyanide on the zeolite in its pores. Then, the zeolite is subjected to ageing treatment, thereby producing a zeolite adsorbent impregnated with metal ferrocyanide in the pores of zeolite. The adsorbent can selectively recover cesium with a high percent cesium removal from a radioactive liquid waste containing at least radioactive cesium, for example, a radioactive liquid waste containing cesium and such coexisting ions as sodium, magnesium, calcium and carbonate ions at the same time at a high concentration. The zeolite adsorbent has a stable adsorbability for a prolonged time.
- Assignee:
- Hitachi Ltd. (Japan)
- Patent Number(s):
- US 4448711
- OSTI ID:
- 6395661
- Resource Relation:
- Patent Priority Date: Priority date 6 Dec 1979, Japan; Other Information: PAT-APPL-213005
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
CESIUM
ADSORPTION
ION EXCHANGE
FERROCYANIDES
CATALYTIC EFFECTS
RADIOACTIVE WASTE PROCESSING
ZEOLITES
CHEMICAL PREPARATION
SORPTIVE PROPERTIES
ADSORBENTS
AQUEOUS SOLUTIONS
LIQUID WASTES
METALS
ALKALI METALS
COMPLEXES
DISPERSIONS
ELEMENTS
INORGANIC ION EXCHANGERS
ION EXCHANGE MATERIALS
IRON COMPLEXES
MANAGEMENT
MATERIALS
MINERALS
MIXTURES
PROCESSING
SOLUTIONS
SORPTION
SURFACE PROPERTIES
SYNTHESIS
TRANSITION ELEMENT COMPLEXES
WASTE MANAGEMENT
WASTE PROCESSING
WASTES
052001* - Nuclear Fuels- Waste Processing