Correlation analysis between cationic metal ...
Type de document :
Article dans une revue scientifique: Article original
URL permanente :
Titre :
Correlation analysis between cationic metal characteristics and ion-exchange performance of brick-derived zeolites: A comprehensive mechanistic explanation
Auteur(s) :
Allahdin, O. [Auteur]
Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement - UMR 8516 [LASIRE]
Université de Bangui
Poumaye, N. [Auteur]
Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement - UMR 8516 [LASIRE]
Wartel, Michel [Auteur]
Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement (LASIRE) - UMR 8516
Boughriet, Abdel [Auteur]
Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement - UMR 8516 [LASIRE]
Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement - UMR 8516 [LASIRE]
Université de Bangui
Poumaye, N. [Auteur]
Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement - UMR 8516 [LASIRE]
Wartel, Michel [Auteur]
Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement (LASIRE) - UMR 8516
Boughriet, Abdel [Auteur]
Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement - UMR 8516 [LASIRE]
Titre de la revue :
Materials Chemistry and Physics
Nom court de la revue :
Mater. Chem. Phys.
Numéro :
276
Pagination :
-
Date de publication :
2022-01-03
ISSN :
0254-0584
Mot(s)-clé(s) en anglais :
Thermodynamics
Selectivity
Ion exchange
Heavy metal
Zeolite
Brick
Selectivity
Ion exchange
Heavy metal
Zeolite
Brick
Discipline(s) HAL :
Planète et Univers [physics]/Sciences de la Terre/Géochimie
Résumé en anglais : [en]
A metakaolinite-rich brick originated from Central African Republic was modified with sodium hydroxide according to a zeolitization process. The synthesized material was characterized by means of environmental scanning ...
Lire la suite >A metakaolinite-rich brick originated from Central African Republic was modified with sodium hydroxide according to a zeolitization process. The synthesized material was characterized by means of environmental scanning electron microscopy and X-ray diffraction. Pore size distribution was determined by nitrogen adsorption-desorption analysis. The equilibrium reactions between the Na-exchanged forms of brick-derived zeolites and aqueous solutions containing one, two or three cationic metals (Me2+ = Cd2+, Fe2+, Ni2+ and Pb2+) were studied in the batch mode at room temperature. Experimental equilibrium results were plotted in the form of “ion-exchange isotherms” in order to better interpret data in terms of metals affinity/selectivity. Kielland plots were drawn and thermodynamic equilibrium constant and standard Gibbs free energy were determined for each 2Na+ → Me2+ or Me12+ → Me22+ exchange. Thermodynamic data were analyzed on the basis of both the general properties of divalent metals in water and the surface behavior of the brick. These investigations permitted to show the importance of first hydrated radius, ionic potential and hydration free energy and second kinetics and mass-transfer/diffusion on the course of the ion-exchange process at brick-water interface.Lire moins >
Lire la suite >A metakaolinite-rich brick originated from Central African Republic was modified with sodium hydroxide according to a zeolitization process. The synthesized material was characterized by means of environmental scanning electron microscopy and X-ray diffraction. Pore size distribution was determined by nitrogen adsorption-desorption analysis. The equilibrium reactions between the Na-exchanged forms of brick-derived zeolites and aqueous solutions containing one, two or three cationic metals (Me2+ = Cd2+, Fe2+, Ni2+ and Pb2+) were studied in the batch mode at room temperature. Experimental equilibrium results were plotted in the form of “ion-exchange isotherms” in order to better interpret data in terms of metals affinity/selectivity. Kielland plots were drawn and thermodynamic equilibrium constant and standard Gibbs free energy were determined for each 2Na+ → Me2+ or Me12+ → Me22+ exchange. Thermodynamic data were analyzed on the basis of both the general properties of divalent metals in water and the surface behavior of the brick. These investigations permitted to show the importance of first hydrated radius, ionic potential and hydration free energy and second kinetics and mass-transfer/diffusion on the course of the ion-exchange process at brick-water interface.Lire moins >
Langue :
Anglais
Comité de lecture :
Oui
Audience :
Internationale
Vulgarisation :
Non
Établissement(s) :
Université de Lille
CNRS
CNRS
Collections :
Date de dépôt :
2024-02-28T23:36:27Z
2024-03-19T11:33:31Z
2024-03-19T11:33:31Z
Fichiers
- document
- Accès libre
- Accéder au document