River Sediments as River Waters’ Primary Pollution Indicator and Secondary Pollution Source in East Donbass Coal-Mining Areas
https://doi.org/10.31857/S2587556620020168
Abstract
For the first time for East Donbass coal-mining areas the material structure and impurity levels of small and average rivers’ bottom sediments were studied. Data of a wide range of heavy metals and minerals in bottom sediments and in the pelitic fraction (<0.01 mm), which is the most informative at assessment of river alluvium impurity degree, are obtained. As the made model experiment result data on region bottom sediments as aquatic environment secondary pollution source are obtained. It is defined that under certain hydrodynamic conditions such as wind resuspension, water discharge change, dredging etc. region river sediments can be a secondary water pollution source with compounds of manganese, iron, copper, chrome and lithium. The rivers were ranked according to the secondary pollution danger’s degree and negative impact on water quality based on the scoring method. The obtained data showed that the major part of the region rivers are characterized by medium and low levels of potential impact on the rivers aquatic environment.
About the Authors
V. E. Zakrutkin
Institute of Earth Sciences, Southern Federal University
Russian Federation
Russian Federation
Rostov-on-Don
E. V. Gibkov
Institute of Earth Sciences, Southern Federal University
Russian Federation
Russian Federation
Rostov-on-Don
O. S. Reshetnyak
Institute of Earth Sciences, Southern Federal University; FGBI Hydrochemical Institute
Russian Federation
Russian Federation
Rostov-on-Don
V. N. Reshetnyak
Institute of Earth Sciences, Southern Federal University
Russian Federation
Russian Federation
Rostov-on-Don
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- Bottom sediments of the Eastern Donbass rivers are represented by poorly differentiated psammite–aleurite–pelite matter.
- Priority pollutants of bottom sediments are chromium, copper and zinc. Their amount exceeds significantly the regional background numbers.
- The level of pollution of river sediments is low for all the rivers of the Seversky Donets basin, low or medium in the Tuzlov basin rivers.
- Under certain conditions, the bottom deposits of the Eastern Donbass rivers can be a source of secondary contamination of the surface water by Mn, Fe, Cu, Cr and Li.
- The assessment of the potential risk of secondary contamination of river waters is based on the mass of elements potentially available for transition to river water and stream discharge of the river.
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For citations:
Zakrutkin V.E., Gibkov E.V., Reshetnyak O.S., Reshetnyak V.N. River Sediments as River Waters’ Primary Pollution Indicator and Secondary Pollution Source in East Donbass Coal-Mining Areas. Izvestiya Rossiiskoi Akademii Nauk. Seriya Geograficheskaya. 2020;84(2):259-271. (In Russ.) https://doi.org/10.31857/S2587556620020168
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