Exchange kinetics of perrhenate, tungstate, and phosphate on the hydrated oxides of quadrivalent metals
Journal Article
·
· J. Appl. Chem. USSR (Engl. Transl.); (United States)
OSTI ID:7059644
This paper determines the kinetic parameters characterizing the uptake of certain anions (phosphate, tungstate, and perrhenate) by hydrated zirconium and tin oxides (HZO and HTO). The interrupt method was used to determine the diffusion stage governing the exchange rate. It was found that diffusion in the sorbent grains limits the rates of uptake of phosphate, tungstate, and perrhenate from 1 M NH/sub 4/NO/sub 3/ solution by granulated zirconium and tin oxides and by those oxides deposited on activated charcoal. Values have been determined for the internal-diffusion coefficients (10/sup -8/-10/sup -9/cm/sup 2//sec) and apparent activation energies (14-27 kJ/mole). It is found that mixed sorbents have better kinetic characteristics than do granulated hydroxides.
- OSTI ID:
- 7059644
- Journal Information:
- J. Appl. Chem. USSR (Engl. Transl.); (United States), Journal Name: J. Appl. Chem. USSR (Engl. Transl.); (United States) Vol. 58:7,PT.1; ISSN JAPUA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400400* -- Electrochemistry
CHALCOGENIDES
CHEMICAL REACTION KINETICS
ELECTRODES
ELEMENTS
HYDROGEN COMPOUNDS
HYDROXIDES
INORGANIC ION EXCHANGERS
ION EXCHANGE
ION EXCHANGE MATERIALS
ION-SELECTIVE ELECTRODES
KINETICS
MATERIALS
METALS
OXIDES
OXYGEN COMPOUNDS
PERRHENATES
PHOSPHATES
PHOSPHORUS COMPOUNDS
REACTION KINETICS
REFRACTORY METAL COMPOUNDS
RHENIUM COMPOUNDS
SORPTION
SORPTIVE PROPERTIES
SURFACE PROPERTIES
TIN COMPOUNDS
TIN OXIDES
TRANSITION ELEMENT COMPOUNDS
TUNGSTATES
ZIRCONIUM COMPOUNDS
ZIRCONIUM OXIDES
400400* -- Electrochemistry
CHALCOGENIDES
CHEMICAL REACTION KINETICS
ELECTRODES
ELEMENTS
HYDROGEN COMPOUNDS
HYDROXIDES
INORGANIC ION EXCHANGERS
ION EXCHANGE
ION EXCHANGE MATERIALS
ION-SELECTIVE ELECTRODES
KINETICS
MATERIALS
METALS
OXIDES
OXYGEN COMPOUNDS
PERRHENATES
PHOSPHATES
PHOSPHORUS COMPOUNDS
REACTION KINETICS
REFRACTORY METAL COMPOUNDS
RHENIUM COMPOUNDS
SORPTION
SORPTIVE PROPERTIES
SURFACE PROPERTIES
TIN COMPOUNDS
TIN OXIDES
TRANSITION ELEMENT COMPOUNDS
TUNGSTATES
ZIRCONIUM COMPOUNDS
ZIRCONIUM OXIDES