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The assessment of the ecological condition of the Ros River within the Belotserkovsky district
The Ros River is polluted with heavy metals, petroleumproducts and organic matter due to the activities of variousindustries, including agriculture (washing away pesticides and fertilizers), food, light and petrochemical industries, etc.Intake of drinking water in Bila Tserkva district is carried outfrom the river Ros, so the aim of the work was to systematizethe results of research over the past 10 years and identify thedynamics of changes in the ecological state of the river.Object of research: Ros River within Bila Tserkva district of Kyiv region.Subject of research: negative environmental factors,water quality indicators. The study of the state of the question was carried out by methods of analysis and synthesis.Water quality assessment was conducted in the Ros Riveron a monthly basis. Initial data (monthly results) are averaged by seasons: spring (March-May, 2010-2020), summer(June-August, 2010-2020), autumn (September-November,2010-2020), winter (December of the previous year - January, February of the current year, 2010/2011-2020/2021).Among the studied indicators there are ammonium salt, nitrates, nitrites, chemical oxygen demand (COD), biochemicaloxygen demand (BOD5), phosphates, total iron, manganese.Seasonal concentrations throughout the study period for ammonium salt ranged from 0.11 to 2.17 mg/dm3, nitrites – from0.01 to 0.82 mg/dm3, nitrates did not exceed 40.0 mg/dm3,COD– in the range from 15.9 to 61.1 mg/dm3, BOD5– in therange from 1.5 to 8.3 mg/dm3, phosphates – from 0.05 to 0.49mg/dm3. Excess concentration of total iron and manganesewere observed in 59% and 29% of cases, respectively. Thatis, there is a tendency to deterioration water quality by somecomponents; the main reason for this is anthropogenic activity, namely the inconsistency of water treatment equipmentof economic entities with modern environmental standardsand the presence of unidentified sources of discharges intothe Ros River basin.
Key words: Rosriver, hydrochemical indicators, ecological condition, seasonal values, MPC.
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