Study of the extraction of La(III), Eu(III), Lu(III) by mesoporous MCM-41 silica impregnated with Cyanex 272 and ionic liquid [C8mim]+[NTf2]+
Description
In recent years, the demand for rare earth elements has increased significantly due to their use in many technologies. These strategic metals are considered as critical raw materials due to their economic importance and the risk of their supply. In this work, materials based on mesoporous silica (MCM-41) functionalized with an organophosphorus ligand Cyanex 272 and/or an ionic liquid [C8mim]+[NTf2]- with different molar fractions have been developed for the adsorption of lanthanide ions La(III), Eu(III) and Lu(III). These materials present adsorption capacities in the presence of the ligand, increased selectivity Eu/La in the presence of ionic liquid and also a selectivity for Eu(III) towards Co(II) and Ni(II). In order to consider an industrial application, a shaping of the materials in an alginate biopolymer has been performed. The extraction properties of the obtained alginate-silica hybrid materials were evaluated for the three lanthanide ions in 'batch' mode before being successfully used in continuous mode. (author)
Abstract (French)
Ces dernieres annees, la demande en elements terres rares a considerablement augmente en raison de leur utilisation dans de nombreuses technologies. Ces metaux strategiques sont consideres comme des matieres premieres critiques etant donnes leur importance economique et le risque concernant leur approvisionnement. Dans ce travail, des materiaux a base de silices mesoporeuses de type MCM-41 fonctionnalises par un ligand organophosphore Cyanex 272 et/ou un liquide ionique [C8mim]+[NTf2]- avec differentes fractions molaires ont ete developpes pour l'adsorption des ions lanthanides La(III), Eu(III) et Lu(III). Ces materiaux presentent des capacites d'adsorption en presence du ligand, une selectivite accrue Eu/La en presence du liquide ionique et egalement une selectivite pour Eu(III) vis-a-vis de Co(II) et Ni(II). Pour envisager une application industrielle du systeme, une mise en forme des materiaux dans un biopolymere d'alginate a ete realisee. Les proprietes d'extraction des materiaux hybrides alginate-silice obtenus ont ete evaluees pour les trois ions lanthanides en mode 'batch' avant d'etre etudiees avec succes en mode continu. (auteur)
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Additional details
Additional titles
- Original title (French)
- Etude de l'extraction de La(III), Eu(III), Lu(III) avec des silices MCM-41 impregnees par Cyanex 272 et [C8mim]+[NTf2]-
Publishing Information
- Imprint Pagination
- 231 p.
- Report number
- FRNC-TH--14797
INIS
- Country of Publication
- France
- Country of Input or Organization
- France
- INIS RN
- 54096011
- Subject category
- S37: INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY;
- Resource subtype / Literary indicator
- Thesis
- Descriptors DEI
- ADSORBENTS; ADSORPTION; ADSORPTION ISOTHERMS; ALGINATES; CHEMICAL REACTION KINETICS; DESORPTION; ELUTRIATION; FEASIBILITY STUDIES; IMPREGNATION; LIGANDS; MOLTEN SALTS; ORGANIC POLYMERS; PH VALUE; POROUS MATERIALS; RARE EARTHS; SILICA; SYNTHESIS; THERMAL GRAVIMETRIC ANALYSIS
- Descriptors DEC
- CHEMICAL ANALYSIS; ELEMENTS; GRAVIMETRIC ANALYSIS; ISOTHERMS; KINETICS; MATERIALS; METALS; MINERALS; ORGANIC COMPOUNDS; OXIDE MINERALS; POLYMERS; QUANTITATIVE CHEMICAL ANALYSIS; REACTION KINETICS; SALTS; SEPARATION PROCESSES; SORPTION; THERMAL ANALYSIS
Optional Information
- Notes
- 439 refs.; Available from the INIS Liaison Officer for France, see the INIS website for current contact and E-mail addresses