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Separation of gadolinium(III) and lanthanum(III) by nanofiltration-complexation in aqueous medium |
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| Authors: | F Chitry R Garcia L Nicod J -L Gass C Madic M Lemaire |
| Institution: | 1. Institut de Recherches sur la Catalyse, Laboratoire de Catalyse et Synthèse Organique, Université C. Bernard-Lyon I, CPE, 43 Bd. du 11 nov. 1918, 69622, Villeurbanne Cédex, France 2. Laboratoire d'Application de la Chimie à l'Environnement, Unité Mixte de Recherche CNRS-Université 5634, Université C. Bernard-Lyon I, CPE, 43 Bd. du 11 nov. 1918, 69622, Villeurbanne Cédex, France 3. Commissariat à l'Energie Atomique, Vallée du Rh?ne (Marcoule), DCC/DRDD/SEMP, BP 171, 30207, Bagnols-sur-Céze Cédex, France |
| Abstract: | A new method is proposed for the separation of gadolinium(III) and lanthanum(III) in aqueous medium by nanofiltration combined with a complexation step. First DTPA was chosen as ligand for a selective Gd(III)/La(III) complexation. Having investigated the influence of three factors (pH, temperature and amount of ligand) for the selective complexation of DTPA towards Gd(III) and La(III), the system is then combined with a nanofiltration separation process to remove 92% of initial Gd(III) and only 12% of initial La. |
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