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Mineralogical and physicochemical characterization of selected Portuguese Mesozoic-Cenozoic muddy/clayey raw materials to be potentially used as healing clays

Published online by Cambridge University Press:  09 July 2018

M. Rebelo ,
F. Rocha  and
E. Ferreira Da Silva
M. Rebelo*
Affiliation:
GEOBIOTEC, Geoscience Department, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal
F. Rocha
Affiliation:
GEOBIOTEC, Geoscience Department, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal
E. Ferreira Da Silva
Affiliation:
GEOBIOTEC, Geoscience Department, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal
*
*E-mail: [email protected]
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Abstract

The use of pelitic geological materials for the treatment of muscle-bone-skin pathologies, by application of a cataplasm made of clay and mineral water mixture, is currently receiving attention and interest from the general public and scientific community. In Portugal there are several natural occurrences of clays/muds which are used for pelotherapy and/or geotherapy. These are carried out either indoors (thalassotherapy and thermal centres) or outdoors, in natural sites generally located near the seaside. The aim of this study is to assess the mineralogical and physicochemical properties of Portuguese raw materials for therapeutic purposes. These materials were collected from different Portuguese Mesozoic-Cenozoic geological formations located in the neighbourhood of thermal centres or at beaches known from their empirical applications. X-ray diffraction (XRD) and scanning electron microscopy (SEM-EDS) were used to assess the mineralogical composition of these clays. Physicochemical properties, such as specific surface area, cation exchange capacity, plasticity/abrasiveness indices and heat diffusiveness were also determined. Having distinct geological ages and genesis, the materials examined are mainly illitic. Less abundant kaolinite and smectite are also present. With respect to their physicochemical properties, all samples have good thermal properties which make them potentially suitable for therapeutic or aesthetic purposes.

Keywords

clay mineralsphysicochemical propertiesthermal mudmedicinal usegeotherapypelotherapymuddy/clayey raw materialsPortugal
Type
Research Article
Information
Clay Minerals , Volume 45 , Issue 2 , June 2010 , pp. 229 - 240
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 2010

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References

Abdel-Fattah, A. & Pingitore, N.E. Jr (2009) Low levels of toxic elements in Dead Sea black mud and mud-derived cosmetic products. Environmental Geochemistry and Health, 31, 487–492.CrossRefGoogle ScholarPubMed
Bain, L.A. (1971) A plasticity chart as an aid to the identification and assessment of industrial clays. Clay Minerals, 9, 1-17.Google Scholar
Biscaye, E.P. (1965) Mineralogy and sedimentation of Recent deep sea clay in the Atlantic Ocean and adjacent seas and oceans. Geological Society of America Bulletin, 76, 803–831.CrossRefGoogle Scholar
Carretero, M.I. (2002) Clay minerals and their beneficial effects upon human health. A review. Applied Clay Science, 21, 155–163.CrossRefGoogle Scholar
Carretero, M.I. & Pozo, M. (2007) Mineralogia Aplicada — salud y Medio Ambiente. Thompson Editores (Spain).Google Scholar
Delgado, R., Soriano, M., Delgado, G. & Gámiz, E. (1992) Study of the mineralogical components of pharmaceutical and cosmetic products using SEM, 2. EUREM 92, Granada, Spain.Google Scholar
Dohrmann, R. (2006) Cation exchange capacity methodology I: An efficient model for the detection of incorrect cation exchange capacity and exchangeable cation results. Applied Clay Science, 34, 31–37.CrossRefGoogle Scholar
Favre, F., Bogdal, C., Gavillet, S. & Stucki, J.W. (2006) Changes in the CEC of a soil smectite-kaolinite clay fraction as induced by structural iron reduction and iron coatings dissolution. Applied Clay Science, 34, 95–104.CrossRefGoogle Scholar
Ferrand, T. & Yvon, J. (1991) Thermal properties of clay pastes for pelotherapy. Applied Clay Science, 6, 21–38.CrossRefGoogle Scholar
Galhano, C., Rocha, F. & Gomes, C. (1999) Geostatistical analysis of the influence of textural, mineralogical and geochemical parameters on the geotechnical behaviour of the Argilas de Aveiro formation (Portugal). Clay Minerals, 34, 109–116.CrossRefGoogle Scholar
Henning, K.-H & Störr, M. (1986) Electron micrographs (TEM, SEM) of clays and clay minerals. Schriftenreihe für Geologische Wissenschaften, Series in Geological Sciences, 25. Akademie-Verlag, Berlin.Google Scholar
Koster, H.M. (1960) Nontronit and Picotit aus dem Basalt des Okberges bei Hundsangen, Westerwald. Contributions to Mineralogy and Petrology, 7, 71–75.CrossRefGoogle Scholar
Legido, J.L., Medina, C., Mourelle, M.L., Carretero, M.I. & Pozo, M. (2007) Comparative study of the cooling rates of bentonite, sepiolite and common clays for their use in pelotherapy. Applied Clay Science, 36, 148–160.CrossRefGoogle Scholar
Li, Y.-H. (2000) A Compendium of Geochemistry. Princeton: Princeton University Press, USA.Google Scholar
Oliveira, A., Rocha, F., Rodrigues, A., Jouanneau, J., Dias, A., Weber, O. & Gomes, C. (2002) Clay minerals from the sedimentary cover from the Northwest Iberian shelf. Progress in Oceanography, 52, 233–247.CrossRefGoogle Scholar
Rebelo, M., Goncalves, P., Silva, E. & Rocha, F. (2005) Studies on physical and chemical properties of some Portuguese Mesocenozoic clayey formations traditionally used as curative or healing materials. Ada Geodynamica et Geomaterialia, 2 (2), 151–155.Google Scholar
Roth, C.B., Jackson, M.L. & Syers, J.K. (1969) Deferration effect on structural ferrous-ferric iron ration and CEC vermiculites and soils. Clays and Clay Minerals, 17, 253–264.CrossRefGoogle Scholar
Schultz, L.G. (1964) Quantitative interpretation of mineralogical composition from X-ray and chemical data for the Pierre Shale. United States Geological Survey Professional Paper, 391-C.Google Scholar
Silva, A.P. (1999) Mineralogia e geoquímica das fracções finas do Miocénico da Península de Setúbal: litostratigrafia e reconstituiçoes paleoambientais. MSc thesis, Universidade Aveiro. Portugal.Google Scholar
Tateo, F. & Summa, V. (2007) Element mobility in clays for healing use. Applied Clay Science, 36, 64–76.CrossRefGoogle Scholar
Terroso, D., Rebelo, M., Santos, A., Rocha, F., Ferreira da Silva, E., Patinha, C. & Forjaz, V.H. (2006) Hydrothermal clays from fumarolic fields (Sao Miguel and Terceira islands, Azores, Portugal) and its possible application in pelotheraphy. Abstracts Joint Meeting Clay Minerals Society/French Clay Group (Oleron, France), p. 256.Google Scholar
Veniale, F., Barberis, E., Carcangiu, G., Morandi, N., Setti, M., Tamanini, M. & Tessier, D. (2004) Formulation of muds for pelotherapy: effects of maturation by different mineral waters. Applied Clay Science, 25, 135–148.CrossRefGoogle Scholar
Veniale, F., Bettero, A., Jobstraibizer, P.G. & Setti, M. (2007) Thermal muds: perspectives of innovations. Applied Clay Science, 36, 141–147.CrossRefGoogle Scholar
Weaver, C.E. & Pollard, L.D. (1975) The Chemistry of Clay Minerals. Elsevier Scientific Publishing Company, Amsterdam, The Netherlands.Google Scholar
Zhuang, J. & Yu, G.-R. (2002) Effects of surface coatings on electrochemical properties and contaminant sorption of clay minerals. Chemosphere, 49, 619–628.CrossRefGoogle ScholarPubMed