Selective adsorption and ion exchange of metal cations and anions with silico-titanates and layered titanates

Metal ions may be removed from aqueous wastes from metal processing plants and from refineries. They may also be used in concentrating radioactive elements found in dilute, aqueous, nuclear wastes. A new series of silico-titanates and alkali titanates are shown to have specific selectivity for catio...

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Bibliographic Details
Published in:Waste management (Elmsford) 1993, Vol.13 (5), p.503-512
Main Authors: Anthony, R.G., Philip, C.V., Dosch, R.G.
Format: Article
Language:English
Subjects:
052001 - Nuclear Fuels- Waste Processing
320305 - Energy Conservation, Consumption, & Utilization- Industrial & Agricultural Processes- Industrial Waste Management
ALKALI METALS
ALKALINE EARTH METALS
CADMIUM
CESIUM
CHROMIUM
ELEMENTS
ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
LEAD
LIQUID WASTES
MANAGEMENT
MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
MATERIALS RECOVERY
MERCURY
METALS
OXYGEN COMPOUNDS
PROCESSING
SOLVENT PROPERTIES
STRONTIUM
TITANATES
TITANIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
WASTE MANAGEMENT
WASTE PROCESSING
WASTES
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Summary:Metal ions may be removed from aqueous wastes from metal processing plants and from refineries. They may also be used in concentrating radioactive elements found in dilute, aqueous, nuclear wastes. A new series of silico-titanates and alkali titanates are shown to have specific selectivity for cations of lead, mercury, and cadmium and the dichromate anion in solutions with low and high pH. Furthermore, one particular silico-titanate, TAM-5, was found to be highly selective for Cs + and Sr 2+ in solutions of 5.7 M Na + and 0.6 M OH −. A high potential exists for these materials for removing Cs + and Sr 2+ from radioactive aqueous wastes containing high concentrations of Na + at high and low pH.
ISSN:0956-053X
1879-2456
DOI:10.1016/0956-053X(93)90080-G