Coprecipitation of europium with barium sulphate
-
Abstract
The distribution behaviour of the trivalent europium ion at a micro-component scale, between barium sulphate and aqueous solution, was studied at ambient temperature. Experiments were carried out using radioactive tracers. Results indicate an enrichment of the micro component in the solid phase relative to the solution. The effects of the concentrations of the micro and macro-elements on the coprecipitation have been examined. Europium distribution coefficient DEu increases from 1.1 ± 0.2 to 3.2 ± 0.4 when initial europium concentration decreases from more than 17 × 10−5 to 1.4 × 10−5 M, in sulphuric media with SO42− in excess or CBa2+/CSO42− < 1. The excess of barium in opposite, results in a decreasing DEu. The coprecipitation of europium with barium sulphate as a heterovalent solid-solution is described by heterogeneous model obeying the Doerner and Hoskins logarithmic partition law. The weaker partition coefficients lower than unity (λ = 0.25 when CEu(III) ≈ 1.4 × 10−5 M and λ = 0.13 when CBa2+/CSO42− < 1 and 17.8 × 10−5 ≤ CEu(III) ≤ 153.5 × 10−5 M) lead to crystals increasingly enriched in the trace element.
© by Oldenbourg Wissenschaftsverlag, Rabat, Germany
Artikel in diesem Heft
- Ratio primary reference measurement procedure (RPRMP) for the determination of iron in biological materials by RNAA
- Binding of stereognostically designed ligands to trivalent, pentavalent, and hexavalent f-block elements
- Uranyl complexes formed with a para-t-butylcalix[4]arene bearing phosphinoyl pendant arms on the lower rim. Solid and solution studies
- Spectroscopic studies on U(VI)-salicylate complex formation with multiple equilibria
- Pillared metal(IV) phosphate-phosphonate extraction of actinides
- Coprecipitation of europium with barium sulphate
- Radon capture with silver exchanged zeolites
- Increase in the specific radioactivity of tritium-labeled compounds obtained by tritium thermal activation method
Artikel in diesem Heft
- Ratio primary reference measurement procedure (RPRMP) for the determination of iron in biological materials by RNAA
- Binding of stereognostically designed ligands to trivalent, pentavalent, and hexavalent f-block elements
- Uranyl complexes formed with a para-t-butylcalix[4]arene bearing phosphinoyl pendant arms on the lower rim. Solid and solution studies
- Spectroscopic studies on U(VI)-salicylate complex formation with multiple equilibria
- Pillared metal(IV) phosphate-phosphonate extraction of actinides
- Coprecipitation of europium with barium sulphate
- Radon capture with silver exchanged zeolites
- Increase in the specific radioactivity of tritium-labeled compounds obtained by tritium thermal activation method
