Synthesis and properties of phosphate cation-exchangers based on silica
Journal Article
·
· Theor. Exp. Chem. (Engl. Transl.); (United States)
Methods of preparation of silicas with chemically grafted molecules of aryl- and alkylphosphonic acids in the amount of 0.7-1.2 molecules/nm/sup 2/ (sorbentes I and II) are described. The spectra of the sorbents in the near and fundamental IR regions were obtained. The protolytic properties of attached phosphonic acids with a different ionic strength of the solution were studied. The value of pK/sub a1/ for grafted arylphosphonic acid (1.9) coincides with pK/sub a/sub 1// = 1.83 for p-tolylphosphonic acid in aqueous solution. Sorption of iron(III) and thorium(IV) ions on these sorbents was studied. A high degree of extraction of thorium (>90% for sorbent I and >60% for sorbent II) is observed up to 4 M HCl. Iron(III) is sorbed in less acid media. A method of concentration of thorium(IV) from dilute solutions with a concentration coefficient of 10/sup 2/ and a method of separating thorium(IV) from 1000-fold amounts of iron(III) are proposed.
- Research Organization:
- Moscow State Univ. (USSR)
- OSTI ID:
- 6330232
- Journal Information:
- Theor. Exp. Chem. (Engl. Transl.); (United States), Journal Name: Theor. Exp. Chem. (Engl. Transl.); (United States) Vol. 23:6; ISSN TEXCA
- Country of Publication:
- United States
- Language:
- English
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050400* -- Nuclear Fuels-- Feed Processing
11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201 -- Chemical & Physicochemical Properties
ACTINIDE COMPOUNDS
ADSORPTION
CHALCOGENIDES
ESTERS
INFRARED SPECTRA
ION EXCHANGE
ION EXCHANGE MATERIALS
IRON COMPOUNDS
MATERIALS
MATERIALS TESTING
MINERALS
ORGANIC COMPOUNDS
ORGANIC ION EXCHANGERS
ORGANIC PHOSPHORUS COMPOUNDS
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PH VALUE
PHOSPHONIC ACID ESTERS
POTENTIOMETRY
SILICA
SILICON COMPOUNDS
SILICON OXIDES
SORPTION
SORPTIVE PROPERTIES
SPECTRA
SPECTROPHOTOMETRY
SURFACE PROPERTIES
SYNTHESIS
TESTING
THORIUM COMPOUNDS
TITRATION
TRANSITION ELEMENT COMPOUNDS
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11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201 -- Chemical & Physicochemical Properties
ACTINIDE COMPOUNDS
ADSORPTION
CHALCOGENIDES
ESTERS
INFRARED SPECTRA
ION EXCHANGE
ION EXCHANGE MATERIALS
IRON COMPOUNDS
MATERIALS
MATERIALS TESTING
MINERALS
ORGANIC COMPOUNDS
ORGANIC ION EXCHANGERS
ORGANIC PHOSPHORUS COMPOUNDS
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PH VALUE
PHOSPHONIC ACID ESTERS
POTENTIOMETRY
SILICA
SILICON COMPOUNDS
SILICON OXIDES
SORPTION
SORPTIVE PROPERTIES
SPECTRA
SPECTROPHOTOMETRY
SURFACE PROPERTIES
SYNTHESIS
TESTING
THORIUM COMPOUNDS
TITRATION
TRANSITION ELEMENT COMPOUNDS
VALENCE