Ion-exchange behavior of Zr and Hf as homologues of element 104, Rf, in H2SO4 and H2SO4/HClO4 mixed solutions
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Z. J. Li
Abstract
The ion-exchange behavior of Zr and Hf in H2SO4 and H2SO4/HClO4 mixed solutions has been studied by a batch method using the carrier-free radiotracers 88Zr and 175Hf. It is found that the ion-exchange behavior of Zr and Hf is basically similar to each other, and that Zr and Hf are adsorbed on the cation-exchange resin as well as on an anion-exchange one in H2SO4. In 0.11−0.99 M H2SO4, the logarithmic values of distribution coefficients (Kd) of Zr and Hf on the cation- and anion-exchange resins linearly decrease with log[H+]eq and log[HSO4-]eq, respectively, indicating that M4+ and M(SO4)32- (M=Zr and Hf) are the predominant cationic and anionic species adsorbed on the resins, respectively. The Kd values of Zr and Hf on the cation-exchange resin in H2SO4/HClO4 at [H+]eq=1.0 M also decrease with an increase of [HSO4-]eq, reflecting successive formation of sulfate complexes. The slope analysis demonstrates that Zr and Hf are coordinated by one SO42- ion at 0.011 and 0.020 M [HSO4-]eq, respectively, and by two SO42- ions at 0.079 and 0.20 M [HSO4-]eq, respectively.
© by Oldenbourg Wissenschaftsverlag, München, Germany
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Articles in the same Issue
- Experimental cross section for the 139La(n, γ)140La reaction at 0.0536 eV
- Ion-exchange behavior of Zr and Hf as homologues of element 104, Rf, in H2SO4 and H2SO4/HClO4 mixed solutions
- Effect of ionic strength on complexation of Pu(IV) with humic acid
- Sorption of Eu(III) and Am(III) on attapulgite: effect of pH, ionic strength and fulvic acid
- Factors influencing plutonium sorption in shale media
- The reduction of Np(VI) and Np(V) by tit dihydroxyurea and its application to the U/Np separation in the PUREX process
- Synthesis and characterization of a new activated carbon supported ammonium molybdophosphate composite and its cesium-selective adsorption properties
- Production, separation and speciation of no-carrier-added Hg radionuclides using greener methodologies
- Study of transfer of minor elements during ironmaking by neutron activation analysis
