Hydrochemical indicators of water quality in Norilsk-Pyasino lake-river system after diesel fuel spill at Norilsk Heat &Power Plant 3 in 2020
D. M. Bezmaternykh1, A. V. Puzanov1, A. V. Kotovshchikov1, A. V. Drobotov2, A. P. Tolomeev2,3
1Institute for Water and Environmental Problems of SB RAS, Barnaul, Russia
2Institute of Biophysics of the Federal Research Center “Krasnoyarsk Science Center of Siberian Branch of the Russian Academy of Sciences”, Krasnoyarsk, Russia
3Siberian Federal University, Krasnoyarsk, Russia
Keywords: hydrochemistry, water quality, River Pyasino, Lake Pyasino, Norilsk, diesel fuel
Abstract
The results of the hydrochemical analysis of consequences of the accidental fuel release in the Norilsk-Pyasino water system are presented. Pollution of watercourses in the catchment of lake Pyasino (сreek nameless/Nadezhdinsky, R. Daldykan, R. Ambarnaya) by oil products, phenols, easily oxidizable and hard to oxidize organic matter (COD, PO and BOD 5), suspended solids, inorganic salts and heavy metals with excess in MPS (including for fishery) as well as a temperature rise in waters of nameless сreek nearby Norilsk Heat & Power Plant 3 were revealed. Contamination of the surface water decreases downstream in ascending order: nameless сreek - Daldykan River - Ambarnaya River. The occurrence of petrochemical products, phenols and organic substances in the surface waters in two months after that spill is obviously due to their diffusion from the river bottom sediments, which accumulated a considerable amount of heavy fractions of diesel fuel after the accident. Increased concentrations of Ca, Cu, Zn, Mn, Co and Ni in waters of investigated tributaries of Lake Pyasino are not directly related to the accident; it results from the general technogeneous pollution of the territory and the increased geochemical background for the elements considered. Water contamination by oil products and phenols in the studied sections of Lake Pyasino (its central and northern parts) and R. Pyasino was not detected. However, concentrations of Pb exceeded MAP and Cd was present in the water, probably, due to accumulated pollutants in previous years.
|
