[en] The physicochemical and mineralogical characterization of the < 250 µm particle-size fraction from six the clay-rich samples from the Sabga deposit (North-west, Cameroon) were carried out in order to evaluate their potential applications. Analyses revealed that the major clay mineral was dioctahedral smectite along with small amounts of kaolinite in three clay samples. Cristobalite, feldspars, ilmenite and heulandites were also found as accessory minerals. A Li-saturation test (Greene-Kelly test) revealed the montmorillonitic nature of the smectite component. The chemical composition of the bulk clays consists of (66-70%) SiO2, (13-16%) Al2O3 and (2-7%) Fe2O3. These clays present mineralogical (high montmorillonite content) and physico-chemical (cation exchange capacity (CEC): 38 to 46 meq/100g and specific surface areas ranging from 33 to 90 m2/g). These physical and chemical properties are fully compatible with potential uses in environmental applications. After some pretreatment (purification, chemical modification), these materials could also be used in refining edible oil as adsorbent, waste water treatment and wine technology.
Centre/Unité de recherche :
Geosciences
Disciplines :
Sciences de la terre & géographie physique
Auteur, co-auteur :
Mache, Jacques Richard ; Université de Liège - ULiège > Form. doct. sc. (géologie - Bologne)
Nyoja, A.
Signing, P.
Kunyu, F.
Mbey, J.A.
Njopwouo, D.
Fagel, Nathalie ; Université de Liège - ULiège > Département de géologie > Argiles, géochimie et environnements sédimentaires
Langue du document :
Anglais
Titre :
Smectite clay from the Sabga deposit (Cameroon): mineralogical and physicochemical properties
Date de publication/diffusion :
juillet 2013
Titre du périodique :
Clay Minerals
ISSN :
0009-8558
Maison d'édition :
Mineralogical Society of Great Britain, London, Royaume-Uni
Brigatti M.F., Galan E. & Theng B.K.G. (2006) Structure and mineralogy of clay minerals. Pp. 309-377 in: Handbook of Clay Science (F. Bergaya, B.K.G. Theng & G. Lagaly, editors), Elsevier, 1, Oxford.
Cook H.E., Johnson P.D., Matti J.C. & Zemmels I. (1975) Methods of sample preparation and X-ray diffraction data analysis in X-ray mineralogy laboratory. Pp. 997-1007 in: Initial Reports of the DSDP (A.G. Kaneps, editor). Printing Office, Washington, D.C.
Dogan M., Dogan A.U., Yesilyurt F.I., Dogan A., Buckner I. & Wurster D.E. (2007) Basline studies of the Clay Minerals Society special clays: specific surface area by the Brunauer, Emmett, Teller (BET) method. Clays and Clay Minerals, 55, 534-541. (Pubitemid 350201617)
Dohrmann R. (2006) Cation exchange capacity methodology II: A modified silver-thiourea method. Applied Clay Science, 34, 38-46. (Pubitemid 44566009)
Eno Belinga S.M., Ekodeck G.E., Njeng E. & Ossah N.H. (1977) L'altération argileuse des roches basiques de la région de Maroua Nord-Cameroun. Annales de la Faculté des Sciences, Université de Yaoundé, 23 (24), 65-77.
Fowden L., Barrer R.M. & Tinker R.B. (1984) Clay minerals: their structure, behaviour and use. Philosophical Transactions of the Royal Society of London, Series A, Mathematical and Physical Sciences, 311, 219-432.
Graetsch H. (1988) Structural characteristics of opaline and microcrystalline silica minerals. Pp. 209-232 in: Silica. Physical Behavior, Geochemistry and Materials Applications. (P.J. Heaney, C.T. Prewitt & G.V. Gibbs, editors), Reviews in Mineralogy, 29. Mineralogical Society of America, Washington DC, USA.
Gregg S.J. & Sing K.S.W. (1982) Adsorption, Surface Area and Porosity. Academic Press, London.
Hajjaji M., Kacim S. & Boulmane M. (2001) Mineralogy and firing characteristics of clay from the valley of Ourika (Morocco). Applied Clay Science, 21, 203-212. (Pubitemid 34731607)
Hartwell J.M. (1965) The diverse uses of montmorillonite. Clay Minerals, 6, 111-118.
Holtzapffel T. (1985) Les Minéraux Argileux : Préparation, Analyse Diffractomé trique et Détermination, 77-109. Société Géologique du Nord, France.
Hradil D., Grygar T. S., Kova M. H., Ka P.B., Lang K., Schneeweiss O.I. & Chvátal M. (2004) Green earth pigment from the Kadan region, Czech Republic: use of rare Fe-rich smectite. Clays and Clay Minerals, 52, 767-778. (Pubitemid 40042745)
Hussin F., Aroua M.K. & Daud W.M.A. (2011) Textural characteristics, surface chemistry and activation of bleaching earth. Chemical Engineering Journal, 170, 90-106.
Kamga R., Nguetnkam J.P. & Villieras F. (2001) Caractérisation des argiles du nord Cameroun en vue de leur utilisation dans la décoloration des huiles végétales. Pp. 247-257 in : Actes de la Premiere Conférence sur la Valorisation des Matériaux Argileux au Cameroun (C. Nkoumbou & D. Njopwouo, editors). Yaoundé, Cameroun.
Kamgang P., Njonfang E., Chazot G. & Tchoua F. (2007) Géochimie et géochronologie des laves des monts Bamenda (ligne volcanique du Cameroun). Comptes Rendus Geosciences, 339, 659-666. (Pubitemid 47611597)
Kamgang P., Njonfang E., Chazot G. & Tchoua F. (2008) Geochemistry and geochronology of mafic rocks from Bamenda Mountains (Cameroon): source composition and crustal contamination along the Cameroon Volcanic Line. Comptes Rendus Geoscience, 340, 850-857.
Kloprogge J.T., Komarneni S. & Amonette J.E. (1999) Synthesis of smectite clay minerals: a critical review. Clays and Clay Minerals, 47, 529-554. (Pubitemid 30054428)
Komarneni S. & Breval E. (1985) Characterization of smectites synthesised from zeolites and mechanism of smectite synthesis. Clay Minerals, 20, 181-188.
Lim C.H. & Jackson M.L. (1986) Expandable phyllosilicate reactions with lithium on heating. Clays and Clay Minerals, 34, 346-352. (Pubitemid 16608556)
Mackenzie R.C. (1970) Simple phyllosilicate based on gibbsite and brucite-like sheets. Pp. 498-537 in: Differential Thermal Analysis of Clays (R.C. Mackenzie, editor). Academic Press, New York.
Madejová J. (2003) FTIR techniques in clay mineral studies. Vibration Spectroscopy, 31, 1-10.
Madejová J., Komdel P. & Cicel B. (1994) Infrared study of octahedral site populations in smectites. Clay Minerals, 29, 319-326.
Madejová J., Bujdák J., Janek M. & Komadel P. (1998) Comparative FT-IR study of structural modifications during acid treatment of dioctahedral smectites and hectorite. Spectrochimica Acta Part A, 54, 1397-1406. (Pubitemid 128412560)
Malla P.B. & Douglas L.A. (1987) Problems in identification of montmorillonite and beidellite. Clays and Clay Minerals, 35, 232-236.
Moenke H.H.W. (1974) Silica, the three-dimensional silicates, borosilicates and beryllium silicates. Pp. 365-382 in: The Infrared Spectra of Minerals (V.C. Farmer, editor). Mineralogical Society, London.
Moore D.M. & Reynolds R.C. (1989) X-ray Diffraction and the Identification and Analysis of Clay Minerals, 179-201. Oxford University Press, Oxford.
Murray H.H. (1995) Clays in industry and the environment. Pp. 49-55 in: Clays Controlling the Environment; Proceedings of the 10th International Clay Conference, Adelaide, Australia, 1993 (G.J. Churchman, R.V. Fitzpatrick & R.A. Eggleton, editors). CSIRO Publishing, Melbourne, Australia.
Njopwouo D. (1993) Chimie, minéralogie, texture et comportement rhéologique des argiles comestibles au Cameroun. Pp. 1-90 in: Etudes Préliminaires (D. Njopwouo, editor). Rapport Séjour Scientifique, France.
Njoya A., Ekodeck G.E., Nkoumbou C., Njopwouo D. & Tchoua M. F. (2001) Matériaux argileux au Cameroun: gisements et exploitation. Pp. 13-30 in : Actes de la Premiere Conférence sur la Valorisation des Matériaux Argileux au Cameroun (C. Nkoumbou & D. Njopwouo, editors). Yaoundé, Cameroun.
Njoya A., Nkoumbou C., Grosbois C., Njopwouo D., Njoya D., Courtin N.A., Yvon J. & Martin F. (2006) Genesis of Mayouom kaolin deposit (West Cameroon). Applied Clay Science, 32, 125-140.
Sing K.S.W., Everett D.H., Haul R.A.W., Moscou L., Pierotti R.A., Rouquérol J. & Siemieniewska T. (1985) Reporting physisorption data for gas/solid systems with special reference to the determination of surface area and porosity. Pure and Applied Chemistry, 57, 603-619.
Thiobault P.M. & Le Berre P. (1985) Les Argiles pour Brique B.R.G.M. CRMO, 65, MINMEE, Cameroun.
Thorez J. (2000) Cation-satured swelling physils: an XRD revisitation. Pp. 71-85 in: Proceedings of the First Latin-American Clay Conference (C.F. Gomes, editor). Associacao Portuguesa de Argilas, Madeira.
Yvon J., Lietard O. & Cases J.M. (1982) Minéralogie des argiles kaoliniques des Charentes. Bulletin de Minéralogie, 105, 431-437.
