Physico-chemical and mineralogical characterization
of a Moroccan bentonite (ibourhardaine)
and determination of its nature and its chemical structure
A. Er-ramly*, A. Ider
Laboratoire de procédés et de l'exploitation des ressources naturelles, l'Environnement et les matériaux,
Département de Chimie Appliquée et Environnement.
L'équipe de développement, la structure et les propriétés des matériaux,
* Corresponding author. E-mail: email@example.com/ firstname.lastname@example.org
The X-ray diffraction analysis supplemented by gravimetric analysis showed that Ibourhardaine bentonite is primarily (smectite) (54 wt %) with the presence of feldspar (23 wt%),Quartz (19 wt %) magnetite (3 wt%) and an amorphous iron oxide in the form of scales (1 wt%). It has a cation- exchange capacity of 82 meq/100g and a specific surface area by using surface area analyser and N2 gaz was used as adsorbate under atmosphere of 35 m²/g.the structural formula calculated for bentonite has shown that the montmorillonite has a high charge density and has a rich iron. SEM-EDX, X-ray, chemical analysis and Infrared spectroscopy demonstrated that this montmorillonite contains iron Fe3 + in the octahedral sheet. The origin of the charge sheets is octaedral (Al1.26 Mg0.57), with the montmorillonite character of the bentonite (57%) is present (more than 50% octahedral charge) with a phase rich in iron.