Investigation of the Effects of Used Thermal Water in Surface Receivers on an Example of a Hungarian Spa

Miski, Zoltán Milán and Bodnár, Ildikó (2025) Investigation of the Effects of Used Thermal Water in Surface Receivers on an Example of a Hungarian Spa. MŰSZAKI TUDOMÁNYOS KÖZLEMÉNYEK (EN), 23. pp. 50-58. ISSN 2601-5773

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Abstract

In our study, the characteristics and environmental impact of the disposal of used thermal water were inves tigated in relation to a surface reservoir by a selected local spa using modern field and laboratory test meth ods at 6 sampling points. The water samples were analysed every 3 months in the field and (within 24 hours of sampling) in the Water Quality Protection Laboratory of the Department of Environmental Engineering, Faculty of Engineering, University of Debrecen, thus, the seasonal changes of the water quality characteris tics were effectively monitored. During the laboratory tests, changes in turbidity, biological oxygen demand (BOD5 ), chemical oxygen demand (COD), total organic carbon (TOC), total inorganic carbon (TIC) and alkalini ty values were studied, and the macro and micro elemental composition of the samples was also analysed by a partner laboratory using modern an elemental analytical method (ICP-OES). Ion chromatographic analyses were also used to determine the typical anion and cation concentration values of the tested water samples.

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