Title :

Correlation analysis between cationic metal characteristics and ion-exchange performance of brick-derived zeolites: A comprehensive mechanistic explanation

Author(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]

Journal title :

Materials Chemistry and Physics

Abbreviated title :

Mater. Chem. Phys.

Volume number :

276

Pages :

-

Publication date :

2022-01-03

ISSN :

0254-0584

English keyword(s) :

Thermodynamics
Selectivity
Ion exchange
Heavy metal
Zeolite
Brick

HAL domain(s) :

Planète et Univers [physics]/Sciences de la Terre/Géochimie

English abstract : [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 ...
Show more >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.Show less >

Language :

Anglais

Peer reviewed article :

Oui

Audience :

Internationale

Popular science :

Non

Administrative institution(s) :

Université de Lille
CNRS

Collections :

• Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement (LASIRE) - UMR 8516

Submission date :

2024-02-28T23:36:27Z
2024-03-19T11:33:31Z