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By 2050, according to the conclusion of the European Commission, the amount of solar panels waste will reach 78 million tons. 85% of all solar panels produced today belong to polycrystalline solar panels. The subject of this paper is the polymer components of polycrystalline solar panels EVA (ethyl vinyl acetate) and Tedlar® (polyvinyl fluoride). The paper reflects studies to determine the chemical composition of impurities of the solar panel components, and the degree of impurities influence on the toxicity of polymer components.

Aims: To study associations between drinking water mineral composition and levels of accumulation of metals in a human body. Methods: Studies were conducted in several geochemical regions. Hair samples were taken from healthy 10-11 years old boys aged. Concentrations of toxic metals were determined in hair. Altogether, concentrations of 29 chemical elements in hair and drinking water were determined. Atomic emission spectrometry with inductive-argon plasma methods were used. Results and conclusions: The levels of calcium and magnesium in the hair in the study groups significantly varied between the samples and correlated with hardness of drinking water. Significant correlations were observed between the concentrations of calcium and magnesium in children's hair and in drinking water. An inverse association between accumulated copper, nickel, iron and strontium in hair in children and concentrations of these metals in drinking water was found. The patterns of metal accumulation varied across the geochemical regions and by the quality of drinking water.

The article is devoted to the determination of the degree of toxicity of the polymer components EVA (ethyl vinyl acetate) and Tedlar® (polyvinyl fluoride) solar panels at the end of their useful life. A biotest analysis was chosen as a research method. The article discusses the main provisions of the selected method, as well as the advantages of the selected test organism. The article reflects the main provisions of the selected method. The results of a study to determine the toxicity of polymer components are also presented. Based on the data obtained, the dependences of the toxicity of compounds on time are constructed. These studies show the possible consequences of the interaction of the aquatic environment (rains) with the components of solar panels during their utilization (disposal).