Search results for "Dependence on ionic medium"

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Hydrolysis and chemical speciation of dioxouranium(VI) ion in aqueous media simulating the major ion composition of seawater

2004

Abstract The hydrolysis and chemical speciation of the dioxouranium(VI) ion at 25 °C was studied in a number of binary electrolytes (LiCl, NaCl, MgCl2, CaCl2, Na2SO4) and some mixtures (NaCl–Na2SO4, NaNO3–Na2SO4, CaCl2–MgCl2) as well as artificial seawater (SSWE) as a function of ionic strength. The results in LiCl, CaCl2 and MgCl2 solutions confirmed the formation of (UO2)2(OH)22+, (UO2)3(OH)42+, (UO2)3(OH)5+ and (UO2)3(OH)7− species (at I=0 mol l−1: log Tβ22=−5.76, log Tβ34=−11.82, log Tβ35=−15.89 and log Tβ37=−29.26). For NaNO3, NaCl and artificial seawater the hydrolysis constant for the formation of the UO2(OH)+ species was also determined (at I=0 mol l−1: log Tβ11=−5.19). The results …

Activity coefficientHydrolysis constantUranium speciationAqueous solutionChemistryHydrolysisInorganic chemistryPitzer parametersIonic bondingArtificial seawaterGeneral ChemistryDependence on ionic strengthOceanographyUranylIon pair formationIonDioxouranium(VI)chemistry.chemical_compoundIonic strengthEnvironmental ChemistryChemical speciationHydrolysis; Dioxouranium(VI); Chemical speciation; Seawater; Dependence on ionic strength; Dependence on ionic medium; Pitzer parameters; Ion pair formationSeawaterDependence on ionic mediumWater Science and Technology
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