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Geology & Geochemistry of Combustible Minerals No. 1 (178) 2019, 74-82.
Mariya KOST’, Halyna MEDVID, Vasyl HARASYMCHUK, Olha TELEGUZ, Iryna SAKHNYUK, Orysia MAJKUTInstitute of Geology and Geochemistry of Combustible Minerals of National Academy of Sciences of Ukraine, Lviv,
The geochemical features of natural waters of the SE “Sanatorium-resort medical center “Shklo” are established by researches of their ecological-geochemical composition and anthropogenic influence.
The mineral water “Naftusya-Shklo” from the pump room in the territory of the sanatorium is selected and analyzed, which is recognized as an analogous to water “Naftusya” by the biological action. The composition of water is hydrocarbonate sodium, having mine-ralization of 0.76 g/dm3, the total hardness of 0.55 mg-eq/dm3, sulfate content of 0.64 g/dm3, and Eh – −79 mV.
The sample of water from baths, which is fed from a depth of 129.0 m, is investigated. Therapeutic hydrogen sulfide water is classified as sodium salt-calcium sulfate with mineralization of 2.97 g/dm3 and high sulfate content (1.76 g/dm3). The balneological active component of the therapeutic water is hydrogen sulfide, the content of which is set at 101.75 mg/dm3. The common feature of these waters is the negative values of the oxidation-reduction potential, which is due to the presence of relatively high content of H2S and HS−.
In addition to the mineral, a sample of water from the water pipe (drinking water from the Opillia suite of the Lower Neogene) was studied. According to the salt composition, it refers to sulfate-hydrocarbonate sodium-calcium with mineralization of 0.53 g/dm3. The content of the determined macro- and microcomponents do not exceed the maximum permissible concentrations for drinking water, which indicates the absence of influence of the lower horizons.
The water sample was also selected from the largest lake of the park, the sanatorium “Shklo”, which is not related to reservoirs with a special regime of protection, therefore access to it is free. The salinity of water refers to chloride-sulfate-hydro carbonate sodium-calcium with mineralization of 0.35 g/dm3.
Two samples of water from the Shklo River after its leak from Yavoriv lake showed that these waters are weakly mineralized, weakly alkaline, calcium hydro carbonate sulfate or sulfate calcium. Quantitatively, sulfate ions are 2–3 times more than hydrocarbons. The content of sulfates, Sodium, Calcium, Magnesium is also high, indicating their contamination. Further down the salt content decreases as a result of mixing with the water of droplets. Several sources of supply of sulfate-ion can be named: karst waters formed on gypsum anhydrite; reservoir waters of the Upper Badenian limestones, hydrogen sulfur of the formation waters of the Badenian horizon; hydrogensulfur, formed as a result of reduction of sulfate at the bottom of Yavoriv lake. Ecological and geochemical parameters of water of surface water reservoirs and watercourses generally also correspond to state standards for their use as recreational.
drinking water, ecological-geochemical parameters, anthropogen influence.
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