Skip to Main content Skip to Navigation
Journal articles

Mineralogical and physico-chemical characterizations of clay from Keur Saër (Senegal)

Abstract : There is interest in exploiting and developing natural resources, particularly deposits of natural clays. Senegal has several clay mineral deposits for which chemical and mineralogical compositions have been little studied. Some of these natural materials are nowadays used in pottery and ceramics. To extend applications, a better basic knowledge is required and, for this objective, the raw clay and separated <2 μm clay fraction from Keur Saër (Senegal) were subjected to chemical and mineralogical studies. Several techniques including X-ray diffraction (XRD), thermal analysis (TG-DTA), Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), N2 adsorption-desorption isotherms, cation exchange capacity (CEC) measurements and solid state nuclear magnetic resonance (NMR) have been used to characterize the material. It was found that the raw clay and the separated clay fraction consist of a mineral mixture in which kaolinite is the main component. 29Si and 27Al MAS-NMR spectra show the presence of silicon atoms linked to three other silicon atoms via an oxygen atom and six coordinated Al atoms. Significant increases in the specific surface area and cation exchange capacity were observed on purification, reaching a maximum of about 73.2 m2g–1 and 9.5 meq/100 g for the separated fine clay fraction while the values for the raw material were around 28.9 m2g–1 and 7.3 meq/100 g.
Document type :
Journal articles
Complete list of metadata

Cited literature [42 references]  Display  Hide  Download

https://hal.archives-ouvertes.fr/hal-01166759
Contributor : Open Archive Toulouse Archive Ouverte (oatao) <>
Submitted on : Tuesday, June 23, 2015 - 10:38:26 AM
Last modification on : Friday, January 10, 2020 - 9:08:22 PM
Long-term archiving on: : Tuesday, April 25, 2017 - 5:48:26 PM

File

mbaye_14094.pdf
Files produced by the author(s)

Identifiers

Collections

Citation

A. Mbaye, C. A. K. Diop, Benaïssa Rhouta, J. M. Brendle, François Senocq, et al.. Mineralogical and physico-chemical characterizations of clay from Keur Saër (Senegal). Clay Minerals, Mineralogical Society, 2012, vol. 47 (n° 4), pp. 499-511. ⟨10.1180/claymin.2012.047.4.08⟩. ⟨hal-01166759⟩

Share

Metrics

Record views

250

Files downloads

318