Environmental assessment of the impact of hydrocarbon pollution on the condition of cooling ponds

Hydrocarbon pollution remains an important and unresolved problem that has worsened during a full-scale invasion, in particular due to the ingress of rocket debris with a significant amount of petroleum products into surface waters. The aim of the work was to provide an assessment of the ecological state of a water body exposed to hydrocarbon and other uncharacteristic pollutants. Field methods: 5 water samples were taken to determine the content of petroleum products and the pH value, and 5 water samples were taken to determine the physical properties, main ions, and heavy metal content. Laboratory and instrumental methods: titrimetric – used to determine the content of chlorides, alkalinity, hardness. According to the results of studies, it was found that chloride ions were in the range of 264-274 mg/dm3, alkalinity values – 3.6-5.5 mmol/dm3. As a result of the hardness study, it was found that the waters are soft. The content of nitrites was determined by photocolometric method (their traces were recorded). Measurement: the pH value was determined by the electrometric method. According to the results, the water was classified as neutral and slightly alkaline. The content of petroleum products in the range of 0.19-16.36 mg/dm3 was determined by fluorimetry (exceeding the standard by 54.5 times). The content of cadmium, zinc, manganese, copper, chromium, and ferric iron was determined by modulation polarisation spectrophotometry. The content of chromium, cadmium, copper was in the range of 0.001 mg/dm3, manganese content – from 0.001 mg/dm3 up to 0.004 mg/dm3, zinc content – from 0.004 mg/dm3 up to 0.008 mg/dm3, ferum content – from 0.004 mg/dm3 up to 0.02 mg/dm3. Using the Ruffel method, the total dilution factor of wastewater in the reservoir was determined to be 125.24. According to the method of calculating the amount of compensation for losses, the damage caused by hydrocarbon pollution was determined, which is 143 thousand UAH. The practical value of the work lies in improving scientific and practical approaches to determining the strategy for conducting a comprehensive environmental study of the state of multifunctional artificial water bodies