river water, chemical composition, pollution, Polissya, organic compounds, purification, ingredient, research
Abstract
The article examines changes in the chemical and bacteriological state of surface rivers waters of the Polissya part of Rivne region, which are referred to the basin of the river Pripyat for the period 2001–2020 in a five-year comparison.
It is known that in this part of Rivne region there is 1 large river – Pripyat, and 5 medium rivers – Styr, Goryn, Ikva, Sluch and Lva. The sub-basins of these rivers include about hundreds of small rivers that play a significant role in changing the ecological status of the hydroecosystem.
According to morphometric parameters, the valleys of the Polissya rivers have wide, wide, swampy floodplains, in the rear seams of which old houses and separate lakes are formed.
In a comprehensive study of river waters studied: temperature, odor, suspended solids, hydrogen, soluble oxygen, sulfates, chlorides, calcium, magnesium dry residue, hardness, ammonium salt, nitrites, nitrates, phosphates, total iron, copper, manganese, lead nickel, cadmium, zinc, chromium.
Characterizing the state of water of each river, the role of the main polluting enterprises and the volume of their return water discharges in 2020 are determined.
The results of the analyzes are summarized in five-year variants of each ingredient, and their comparison is expressed in "one-time exceedances" of the corresponding MPC values for reservoirs of cultural and domestic water use.
Characteristic of all six rivers of Polissya is the dominance of organic, chemical and suspended matter pollution.
The magnitude of return water discharges is directly dependent on the size of the settlement and the number of inhabitants served by local utilities, mainly water utilities. A significant contribution to river water pollution is made by industrial enterprises in various industries, with slightly less discharges coming from modern agricultural enterprises.
It is recommended to use reagent treatment methods and to introduce the latest technological equipment for wastewater treatment.
Author Biographies
I. I. Zaleskyi, National University of Water and Environmental Engineering, Rivne
Candidate of Geographical Sciences (Ph.D), Associate Professor
H. A. Maiboroda, National University of Water and Environmental Engineering, Rivne
