INORGANIC AND ORGANIC SUBSTANCES IN WATER BODIES OF THE “OLEKSANDRIYA” DENDROLOGICAL PARK (THE TOWN OF BILA TSERKVA)

Abstract

The content of inorganic nitrogen and phosphorus compounds, chloride, organic matter, and dissolved oxygen was studied in 11 ponds of the “Oleksandriya” Dendrological Park. Samples were taken in summer 2016–2018 in the cascade of ponds located in the Western, Middle, and Eastern ravines of the park. The obtained data suggest that the studied ponds are significantly polluted by inorganic and organic substances, the amount of which remains still very high. The ponds of the Western ravine are characterized by the highest content of inorganic nitrogen compounds and chloride.Thus, in particular, the concentration of ammonium in the Poterchata pond accounted for 103.00–160.00 mg N/L, in the Rusalka pond – 64.00–89.50 mg N/L, in the Vodyanyk pond – 28.00–43.00 mg N/L, whereas in the Skelny pond – 12.00–38.50 mg N/L. The concentration of nitrite in the studied ponds accounted for respectively 1.130–2.213 mg N/L, 1.538–1.950 mg N/L, 0.988–1.388 mg N/L, and 0.730–1.288 mg N/L. The concentration of nitrate was also rather high. Thus, in the Poterchata pond it was 52.00–81.25 mg N/L, in the Rusalka pond – 48.00–73.75 mg N/L, in the Vodyayk pond – 21.50–38.75 mg N/L, whereas in the Skelny pond – 14.50–27.50 mg N/L. The concentration of chloride in the studied ponds accounted for respectively 690.9–795.7 mg/L, 553.8–580.5 mg/L, 283.5–308.4 mg/L, and 274.5–287.1 mg/L. The highest concentration of inorganic phosphorus (0.470 mg/L) was observed in one of the ponds of the Middle ravine. The highest values of dichromate oxidizablity (97.0 and 81.0 mg O/L) were registered in the first two ponds of the Western ravine, which is indicative of their essential contamination by organic matter. The lowest concentration of the dissolved oxygen (3.8 mg/L) was observed in the ponds of the Middle ravine. The complex of measurements aimed at the improvement of the state of the ponds of the “Oleksandriya” Dendrological Park should be elaborated and realized. In particular, it is essential to reveal the main source of the pollution of the ponds of the Western ravine by inorganic nitrogen compounds and chloride, and also to keep them clear of pollutants.