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Реферат PDF Rus Firstly, the data on the physical and chemical properties of sapropel mud and morphology of the bottom of several freshwater lakes of the central part of Elizovo district of the Kamchatka have been represented. The Ovalnoe and Sinichkino lakes (district of Petropavlovsk-Kamchatsky sity), the Lesnoe lake (district of Paratunka village) and unnamed lake 2.5 km south of Malki village were explored in 2016. The aim of the research was to study the features of the physical and chemical properties of sapropels and to assess the prospects for balneotherapeutic and cosmetological use. The sapropel mud of the unnamed lake in the Malki village area was the most promising among the lakes surveyed. Physical indices of this dirt comply with the basic standards for therapeutic sapropel mud: humidity 71.28–95.27 %, volume weight 1.13–1.14 g/cm, shear resistance value is 1128–1619 dine/cm, heat capacity 0.95–0.98 cal/g·deg, tackiness at 25 °C is 2556–3714 dine/cm. The composition of mud solution is characterized as sulphate-hydrogen carbonate magnesium-sodium calcium. A content of biologically active elements is low (I – 0.05 mg/dm; Br – 0.085 mg/dm; B < 0.05 mg/dm; H2SiO3 – 40.6 mg/dm). By the sum of mineral substances (M – 0.059 g/dm) the mud solution refers to fresh, the pH of the mud is 5.2– 7.2, Eh reaches –100 mV. Natural mud of the nameless lake located in the area of Malki village refers to therapeutic freshwater sulfide sapropel mud and can be used for balneological and cosmetic purposes with a wide range of indications. Additional experimental and clinical studies are necessary for the correct use of therapeutic dirt for therapeutic purposes.

Physical and chemical features of sapropelic mud of some freshwater lakes in the Elizovo district of the Kamchatka (Russia)