Thermal behaviour of clays and clay-water mixtures for pelotherapy

Authors: Armijo F (1) , Maraver F (1) , Pozo M (2) , Carretero MI (3) , Armijo O (1) , Fernandez-Torán MA (4) , Fernández-González MV (5) , Corvillo I (1)
(1) Escuela Profesional de Hidrología Médica, Facultad de Medicina, Universidad Complutense de Madrid (2) Dpto. Geología y Geoquímica, Facultad de Ciencias, Universidad Autónoma de Madrid (3) Dpto. Cristalografı́a y Mineralogı́a, Facultad de Quı́mica, Universidad de Sevilla (4) Balneario de Hervideros de Cofrentes (5) Departamento de Edafología y Química Agrícola, Facultad de Farmacia, Universidad de Granada
Source: Applied Clay Science Volume 126, June 2016, Pages 50–56
DOI: 10.1016/j.clay.2016.02.020 Publication date: 2016 Jun E-Publication date: March 7, 2016 Availability: abstract Copyright: © 2016 Elsevier B.V. All rights reserved.
Language: English Countries: Not specified Location: Not specified Correspondence address:


Article abstract

To prepare peloids for thermotherapy, the thermal behaviour of their component clay pastes needs to be known. This study was designed to experimentally determine the specific heat capacity and cooling kinetics of pastes prepared by adding different proportions of water to eight commercially available clays of different composition. According to exponential equations fitted to the cooling curves for the pastes, a new parameter designated the relaxation time is proposed. Using this parameter, the clayey pastes could be classified on the basis of rate of heat release. According to its specific heat capacity and relaxation time, Na-activated magnesium bentonite emerged as the most suitable clay material to prepare peloids with applications in thermotherapy.

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