Physical properties of peloids prepared with medicinal mineral waters from Lanjarón Spa (Granada, Spain). Fernández González, María Virginia Martín García, Juan Manuel Delgado Calvo-Flores, Gabriel Párraga Martínez, Jesús Francisco Carretero, María Isabel Delgado Calvo-Flores, Rafael Kaolin Bentonite Granulometry Cooling kinetic SEM-IA microfabric Maturation time Peloids were prepared with kaolin and bentonite (saponite) (90:10, wt:wt) and medicinal mineral waters (MMW) from Lanjarón Spa (Granada, Spain), “Salud V” (‘sodium chloride-rich, calcic, bicarbonate and ferruginous’) (samples Sp), and “El Salado” (‘chloride and sodium-rich, bicarbonated, calcic and ferruginous’) (samples Ep) along a maturation time (MT) of 1, 3 and 6 months. The granulometry was silty clay, > 89% of the particles being < 20 μm, with clay increasing slightly with MT (P < 0.05). The cooling time parameters Δtind and Δt− 22,5 °C, changed according to sample (differences of > 50%), with a complex dependance; depending on MMW, cooling times decreased with increasing mineralization (e.g. ‘dry residue’ versus Δt− 22,5 °C, P < 0.1); in samples Ep there was a positive relationship with MT. Scanning Electron Microscopy (SEM) and Image Analysis (IA), of the microfabric showed it to depend on MMW. The microfabric also changed with MT, reaching an optimum state of better structure and porosity after 1 month for Sp and 3 months for Ep (“house of cards”), later degrading with time. This study has practical potential since: 1) it uses relatively common and easily-accessible raw materials; for example, the MMW are in current use. 2) Peloids with physical properties suitable for spa use were obtained: fine texture, cooling times of up to 30 min above indifferent temperature, and evolved microfabric. And 3) it provides information on optimum MT according to each property studied, which is always of interest in the spa industry. 2024-01-31T07:54:26Z 2024-01-31T07:54:26Z 2017 info:eu-repo/semantics/article Published version: M.V. Fernández- González, J.M. Martín- García, G. Delgado, J. Párraga, M.I. Carretero, R. Delgado, 2017. Physical properties of peloids prepared with medicinal mineral waters from Lanjarón Spa (Granada, Spain). Applied Clay Science, Vol. 135, pág. 465–474. https://doi.org/10.1016/j.clay.2016.10.034 https://hdl.handle.net/10481/87695 10.1016/j.clay.2016.10.034 eng http://creativecommons.org/licenses/by-nc-nd/4.0/ info:eu-repo/semantics/openAccess Attribution-NonCommercial-NoDerivatives 4.0 Internacional Elsevier