Thermal behavior of mixtures of bentonitic clay and saline solutions

Thermophysical characterization is a useful tool for studying mixtures of clay and saline solutions and evaluating their suitability from a thermotherapic point of view. This work focuses on studying the specific heat capacity, density, thermal conductivity and viscosity of a bentonitic clay (compos...

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Bibliographic Details
Published in:Applied clay science 2013-02, Vol.72, p.18-25
Main Authors: Casás, L.M., Pozo, M., Gómez, C.P., Pozo, E., Bessières, L.D., Plantier, F., Legido, J.L.
Format: Article
Language:English
Subjects:
Bentonitic clay
Chemical Physics
Earth sciences
Earth, ocean, space
Exact sciences and technology
Mineralogy
Physics
Salinity
Seawater
Silicates
Specific heat capacity
Thermophysical properties
Thermotherapy
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Summary:Thermophysical characterization is a useful tool for studying mixtures of clay and saline solutions and evaluating their suitability from a thermotherapic point of view. This work focuses on studying the specific heat capacity, density, thermal conductivity and viscosity of a bentonitic clay (composed mainly of 55% Na+-saturated trioctahedral smectite, 28% sepiolite and 15% illite) mixed with different saline solutions (0, 1, 2, 3 and 3.5%) in the temperature range 293.15 to 317.15K. The results indicate meaningful differences in the thermal behavior of the studied pastes in relation to thermotherapy and pelotherapy. ► We have characterized pastes of bentonitic clay mixed with marine waters. ► We report specific heat capacity measurements using Calvet calorimetry principle. ► The increase in specific heat capacity with temperature is due to the clay content. ► The concentration of water rules the behavior of thermophysical properties. ► In addition to thermal properties of pastes, the presence of ions is favorable.
ISSN:0169-1317
1872-9053
DOI:10.1016/j.clay.2012.12.009