ECOLOGICAL AND TOXICOLOGICAL ASSESSMENT OF THE STATE OF SURFACE WATERS OF THE ZHURAVLIVSKY HYDROPARK
DOI:
https://doi.org/10.32782/naturaljournal.11.2025.4Keywords:
pollution, biotesting, surface water body, test object, chronic toxicity, integrated assessmentAbstract
The most effective biological method for assessing the possible danger of certain sources of pollutionfor aquatic flora and fauna is biotesting – an experimental determination of the toxicity of water for hydrobionts, based on recording the reactions of test objects, which can be used to establish the toxic effect of polluted water. The purpose of the work was ecological and toxicological studies of the water quality of the Zhuravlivskyi hydropark, which are under the influence of the urban system of a large city. Sampling of surface water samples from the Zhuravlivska reservoir was carried out in the summer and autumn of 2024. Samples were taken in 4 sections from the river. Kharkiv. In the work, to determine the chronic toxicity of water from the Kharkiv River, a biotesting technique was used to determinethe chronic toxicity of water on the crustacean Ceriodaphnia affinis Lilljeborg, which is based on establishing the difference between the survival and (or) fertility of Ceriodaphnia affinis Lilljeborg in the water being analyzed and in the water in which Ceriodaphnia affinis Lilljeborg are cultivated.As a result of ecological and toxicological studies carried out in the summer of 2024, toxic properties were determined in all surface water samples that were taken from the Zhuravlivskaya reservoir inthe vicinity of Kvituchy Bridge; St. Unconquered, cities; swimming pool of the sailors’ club; Zhuravlivska dam.In the summer of 2024 the Flowering Bridge is in the works; St. Unconquered, cities; the floating base of the sailors’ club was determined to be of the 2nd water quality class – the water is slightly polluted, and in the Zhuravlivska dam, the 3rd water quality class – the water is moderately polluted.In the autumn of 2024, the Kvituchy bridge area was assigned the 2nd water quality class – the water is slightly polluted; in the creations of st. Unconquered, the city and the floating base of the sailors’ club were determined to be of the 3rd water quality class – the water is moderately polluted, and in the Zhuravlivska dam – the 4th water quality class (dirty water).The results of biotesting make it possible to establish the toxic properties of water without connection with specific substances, since it is not known which substance caused the toxic effect. Thus, biotesting allows you to determine the integral toxicity due to the totality of all hazardous chemicals and their metabolites present in the sample.
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