Rate of adsorption of uranium from seawater with a calix(6)arene adsorbent

Journal Article · Thu Oct 01 04:00:00 EDT 1992 · Separation Science and Technology; (United States)

DOI:https://doi.org/10.1080/01496399208029230· OSTI ID:7170383

Aihara, Takao; Goto, Akira; Kago, Tokihiro; Kusakabe, Katsuki; Morooka, Shigeharu ^[1]

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1. Kyushu Univ., Fukuoka (Japan)

The rate of complex formation between calix(6)arene-p-hexasulfonate and uranyl ion is studied over a wide range of carbonate ion concentrations. The presence of carbonate ion decreases the complexation rate. The distribution of various uranyl species is calculated from a set of mass balances of participating ions with their stability constants. UO{sub 2}(CO{sub 3}){sub 3}{sup 4{minus}} has the highest concentration, followed by UO{sub 2}(OH){sub 3}{sup {minus}} and UO{sub 2}(CO{sub 3}){sub 2}{sup 2{minus}}. Other uranyl species are negligible. The complexation rate is proportional to the 0.27-1.0 power of the total concentration of uranyl species other than UO{sub 2}(CO{sub 3}){sub 3}{sup 4{minus}}. This implies that the rate-determining step of the complexation is the reaction between calix(6)arene-p-hexasulfonate and UO{sub 2}(OH){sub 3}{sup {minus}} or UO{sub 2}(CO{sub 3}){sub 2}{sup 2{minus}}.

• OSTI ID: 7170383
• Journal Information: Separation Science and Technology; (United States), Journal Name: Separation Science and Technology; (United States) Vol. 27:12; ISSN SSTED; ISSN 0149-6395
• Country of Publication: United States
• Language: English

Related Subjects

050101* -- Nuclear Fuels-- Reserves
Exploration
& Mining-- Recovery from Waters of the Earth-- (1992-)
11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS
ACTINIDE COMPOUNDS
ACTINIDES
ADSORBENTS
ADSORPTION
CARBON COMPOUNDS
CARBONATES
CHEMICAL REACTION KINETICS
COMPLEXES
DATA
ELEMENTS
EQUATIONS
EXPERIMENTAL DATA
HYDROGEN COMPOUNDS
INFORMATION
KINETIC EQUATIONS
KINETICS
MANAGEMENT
MASS BALANCE
MATERIALS RECOVERY
METALS
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
OXYGEN COMPOUNDS
PERFORMANCE
PROCESSING
QUANTITY RATIO
REACTION KINETICS
SEAWATER
SORPTION
SULFONATES
SYNTHESIS
URANIUM
URANIUM COMPOUNDS
URANYL COMPOUNDS
WASTE MANAGEMENT
WASTE PROCESSING
WATER