Chemical and mineralogical characteristics of peloids in Turkey

Geochemical and mineralogical characterization of Ria de Aveiro (Portugal) saltpan sediments for pelotherapy application

The present study aims to characterize sediments textural, geochemical and mineralogical composition used in a SPA for pelotherapy applications. Six samples were collected in two areas of an open-air saline SPA, a former saltpan in Ria de Aveiro (Portugal). Sampling areas are predominantly composed by recent alluvium that had been affected by chemical industrial effluents for over 50 years. Samples < 2000, 63, and 2 µm fractions were analyzed by X-ray Diffraction (XRD) and X-ray Fluorescence (XRF), for identification of mineral phases and chemical composition. SEM analysis was used for individual particles morphological characterization and chemical semi-quantification. Texture, mineral phases and chemical composition showed the influence of SPA pond beneficiation works. The two SPA areas revealed distinct mineral phases, one with higher quartz content, and the other with higher halite content, consistent with their environmental conditions. Illite constituted the most abundant mineral phase of the clay fraction. Preliminary results suggested concentrations of potential toxic elements (e.g., As, Cd) above reference values, representing a risk to the ecosystem and humans.

Effectiveness of peloid therapy in patients with chronic low back pain: a single-blind controlled study

The aim of this study was to compare peloid therapy in addition to home exercise with home exercise alone in terms of pain, function, quality of life, and depression in patients with chronic low back pain (cLBP). A total of 106 cLBP patients were divided into two equal groups as treatment and control. The peloid therapy group had peloid therapy (with a total of 15 sessions on 5 days per week for 3 weeks duration with 45 °C temperature lasting 30 min/day) + home exercise program. The control group was only given a home exercise program. Patients completed the visual analog scale-pain (VAS-pain), patient and physician global assessments (VAS-PGA and VAS-PhGA), revised Oswestry disability index (rODI) for functional status, the short form-36 (SF-36) for quality of life, and Beck Depression Inventory (BDI) for depression three times as before treatment, after treatment (3rd week), and 1 month after the end of treatment. Assessments in the 3rd week at the end of treatment revealed statistically significant improvements for rODI (p = 0.013), VAS-pain (p = 0.039), and VAS-PhGA (p = 0.002) parameters in the peloid therapy group compared to the control group. Assessments in the 1st month after the end of treatment revealed statistically significant improvements in rODI (p < 0.001), VAS-pain (p < 0.001), VAS-PGA (p = 0.002), VAS-PhGA (p < 0.001), and SF-36VE (p = 0.022) parameters in the peloid therapy group compared to the control group. Peloid therapy + home exercise was statistically significantly superior to home exercise alone in improving pain and function in patients with cLBP. Peloid therapy may be recommended as a non-pharmacological treatment for cLBP patients. There is a need for randomized studies with longer follow-up including biochemical parameters to verify the beneficial effects observed in this study and elaborate the mechanisms of action.

Medical Peat Waste Upcycling to Carbonized Solid Fuel in the Torrefaction Process

Peat is the main type of peloid used in Polish cosmetic/healing spa facilities. Depending on treatment and origin, peat waste can be contaminated microbiologically, and as a result, it must be incinerated in medical waste incineration plants without energy recovery (local law). Such a situation leads to peat waste management costs increase. Therefore, in this work, we checked the possibility of peat waste upcycling to carbonized solid fuel (CSF) using torrefaction. Torrefaction is a thermal treatment process that removes microbiological contamination and improves the fuel properties of peat waste. In this work, the torrefaction conditions (temperature and time) on CSF quality were tested. Parallelly, peat decomposition kinetics using TGA and torrefaction kinetics with lifetime prediction using macro-TGA were determined. Furthermore, torrefaction theoretical mass and energy balance were determined. The results were compared with reference material (wood), and as a result, obtained data can be used to adjust currently used wood torrefaction technologies for peat torrefaction. The results show that torrefaction improves the high heating value of peat waste from 19.0 to 21.3 MJ × kg−1, peat main decomposition takes place at 200–550 °C following second reaction order (n = 2), with an activation energy of 33.34 kJ × mol−1, and pre-exponential factor of 4.40 × 10−1 s−1. Moreover, differential scanning calorimetry analysis revealed that peat torrefaction required slightly more energy than wood torrefaction, and macro-TGA showed that peat torrefaction has lower torrefaction constant reaction rates (k) than wood 1.05 × 10−5–3.15 × 10−5 vs. 1.43 × 10−5–7.25 × 10−5 s−1.

Peloids as Thermotherapeutic Agents

The use of peloids as heat-providing therapeutic systems dates back to antiquity. Such systems consist of a liquid phase and an organic or inorganic solid phase. The latter facilitates the handling, preparation and stability of the solid–liquid system, modifying its organoleptic and phy-sicochemical properties, and improves its efficacy and tolerance. Peloids enable the application of heat to very specific zones and the release of heat at a given rate. The aims of this work are to study 16 reference peloids used in medical spa centers as thermo-therapeutic agents as well as to propose nine raw materials as a solid phase for the preparation of peloids. The physical properties studied are the centesimal composition, the instrumental texture and the thermal parameters. In conclusion, the peloids of the medical spas studied are used as thermotherapeutic agents in the treatment of musculoskeletal disorders, especially in knee osteoarthritis and to a lesser extent in back pain and psoriatic arthropathy. The clinical experience in these centers shows that the main effects of the application of their peloids are the reduction of pain, an increase in the joint’s functional capacity and an improvement in the quality of life. As thermotherapeutic agents, all the peloids of the me-dical spas studied and the pastes (raw materials with distilled water) examined showed a heat flow rate of up to four times lower than that shown by the same amount of water. The raw materials studied can be used as solid phases for the preparation of peloids with mineral waters.