کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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613671 | 880726 | 2006 | 9 صفحه PDF | دانلود رایگان |
Chemical retention, i.e., partition of the element between aqueous solution and mineral surface, is a key phenomenon for assessing the safety of possible nuclear waste disposal. For this purpose, the sorption of Eu(III) onto a model mineral—α-alumina—is studied here, including the effects of groundwater chemistry: pH and concentrations of small organic and inorganic ligands (acetate, oxalate, and carbonate anions). This work presents some experimental evidence for a synergic mechanism of sorption of europium–ligand complexes onto the alumina. Only cationic complexes were necessary to consider to model experimental results. Using the ion-exchange theory (IET) and a corresponding restricted set of parameters—exchange capacities and thermodynamic equilibrium constants—the whole set of sorption experiments of Eu(III) cationic species onto the α-alumina was modeled under various chemical conditions.
The synergic effects of complexing organic acids on europium(III) sorption onto α-alumina.Figure optionsDownload as PowerPoint slide
Journal: Journal of Colloid and Interface Science - Volume 298, Issue 2, 15 June 2006, Pages 573–581