Kinetics and mechanism of sorption of chloro complexes of iridium(III) from dilute solutions on hydrated zirconium dioxide
It was shown earlier that chloro complexes of iridium(II) are sorbed by hydrated dioxide (HZD). The purpose of this work was to study the kinetic relationships and mechanism of sorption of chloro complexes of iridium(III) by HZD. The results indicate that the kinetics of sorption of chloro complexes of iridium(III) by hydrated zirconium dioxide from acid solutions with iridium(III) concentration of 10/sup -4/ M is of the external-diffusion type. Sorption of hexachloroiridate(III) ions from solutions of K/sub 3/(IrCl/sub 6/) in 0.01 M HCl proceeds by an anion-exchange mechanism, followed by ligand-exchange interaction in the sorbent phase. In neutral media sorption of chloro complexes of iridium(III) is determined by ligand interaction of aquated forms of iridium with aqua and hydroxo groups of HZD by formation of hydrogen bonds.
- OSTI ID:
- 6974722
- Journal Information:
- J. Appl. Chem. USSR (Engl. Transl.); (United States), Journal Name: J. Appl. Chem. USSR (Engl. Transl.); (United States) Vol. 60:4; ISSN JAPUA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
400201* -- Chemical & Physicochemical Properties
ADSORBENTS
ADSORPTION
ALKALI METAL COMPOUNDS
CATALYSIS
CATALYSTS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL REACTION KINETICS
CHLORIDES
CHLORINE COMPOUNDS
COMPLEXES
DIFFUSION
HALIDES
HALOGEN COMPOUNDS
HETEROGENEOUS CATALYSIS
HYDRATES
HYDROCHLORIC ACID
HYDROGEN COMPOUNDS
INORGANIC ACIDS
INORGANIC ION EXCHANGERS
ION EXCHANGE
ION EXCHANGE MATERIALS
IRIDIUM CHLORIDES
IRIDIUM COMPLEXES
IRIDIUM COMPOUNDS
KINETICS
MATERIALS
OXIDES
OXYGEN COMPOUNDS
POTASSIUM COMPOUNDS
QUANTITY RATIO
REACTION KINETICS
REFRACTORY METAL COMPOUNDS
SORPTION
SORPTIVE PROPERTIES
SURFACE PROPERTIES
TEMPERATURE DEPENDENCE
TRANSITION ELEMENT COMPLEXES
TRANSITION ELEMENT COMPOUNDS
VALENCE
ZIRCONIUM COMPOUNDS
ZIRCONIUM OXIDES