ECOLOGICAL STATE OF THE WATERS, BOTTOM SEDIMENTS AND SOILS OF THE RIVER VALLEY THE VTORAYA RECHKA RIVER (ACCORDING TO CHEMICAL AND MICROBIOLOGICAL INDICATORS)

2021 ◽  
Vol 9 ◽  
Author(s):  
E.A. Zharikova ◽  
◽  
S.V. Klyshevskaya ◽  
A.D. Popova ◽  
T.S. Vshivkova ◽  
...  
Keyword(s):  
Bottom Sediments ◽  
River Valley ◽  
Ecological State ◽  
Microbiological Indicators

scholarly journals Peculiarities of Pollution by Some Persistent Organic Pollutants of the Marine Environment of the Northwestern Part of the Black Sea

2020 ◽  
Keyword(s):  
Black Sea ◽  
Marine Environment ◽  
Bottom Sediments ◽  
Sea Water ◽  
Marine Pollution ◽  
Marine Organisms ◽  
The Black Sea ◽  
Northwestern Part ◽  
Marine Biota ◽  
Ecological State

Purpose. The study is aimed at estimation of marine pollution in the northwestern part of the Black Sea by some persistent organic pollutants (POPs), in particular polychlorinated biphenyls (PCBs) and hexachlorobenzene (HCB). Methods. Peculiarities of marine pollution were determined on the basis of research conducted at the Ukrainian Scientific Center of Ecology of the Sea (UkrSCES). The content of PCBs and HCB was determined on a gas chromatograph Agilent 7890B with a capillary column and an electronic capture detector using the methods of the US Environmental Protection Agency (EPA-3545A, 3630C, 8081, 8082A, 8275A). The ecological state of the marine environment was determined using developed in UkrSCES the “Ecological standards of marine environment quality”, which allow us to assess the quality status of such components of the marine environment (sea water, bottom sediments and biota). Results. The methodology of environmental standards has been adapted to assess the pollution of the marine environment of POPs. The ecological state of sea water and bottom sediments of the northwestern part of the Black Sea is determined according to the established values of Maximum Concentration Limit (MCL) and Ecological Standards (ES). The ecological state of marine biota was assessed by HCB pollution according to the established Ecological Standard. The European analogue of MCL (MAC-EQS) for industrial marine organisms was used to assess the ecological state of marine organisms for PCBs pollution (but it should be noted that the assessment was performed only for non-dioxin-like PCBs. Standard for the content of PCBs in marine organisms, in particular, – of industrial importance, must be implemented in Ukraine at the legislative level. For integral assessment of the ecological state of the marine environment and the specifics of POPs pollution in the northwestern part of the Black Sea, it is necessary to introduce a comprehensive monitoring system that would analyze marine pollution by all POPs required by the Stockholm Convention. Conclusions. The ecological state of the sea water of the northwestern part of the Black Sea by POPs pollution in most cases corresponds to the category "very good". The state of marine biota in most cases corresponds to the quality classes "good" and "very good", but in Ukraine there are no clear standards that would regulate the content of PCBs in marine biota, in particular – for industrial important species of marine organisms. The ecological condition of bottom sediments is mainly classified as "satisfactory" and "poor", which under certain natural conditions can be a source of secondary pollution of sea water and biota. For integral assessment of the ecological state, it is necessary to take into account all POPs, which can significantly change the results of the assessment of the quality of the marine environment of the northwestern part of the Black Sea.

scholarly journals Geo-ecological characteristics of the small lakes bottom sediments in the North of Western Siberia

2021 ◽  
Vol 6 (4) ◽  
pp. 299-307
Author(s):  
Gulnara N. Shigabaeva ◽  
Andrey V. Soromotin ◽  
Еvgeny V. Galunin ◽  
Аnna V. Ruseikina ◽  
Anna А. Kurbash ◽  
...  
Keyword(s):  
Bottom Sediments ◽  
Western Siberia ◽  
Statistical Processing ◽  
Point Of View ◽  
Quantitative Chemical Analysis ◽  
Ecological State ◽  
Small Lakes ◽  
The North ◽  
Mobile Forms ◽  
State Of Water

The article analyzes and provides data on the processes of accumulation of heavy metals by bottom sediments from the point of view of environmental assessment. The purpose of this paper is to identify the degree of anthropogenic influence on the lakes of the Tazovskiy and Surgut districts, and assess the ecological state of water bodies and adjacent territories. The main processes occurring in natural reservoirs, which lead to the transfer of toxicants into the environment, are considered. The data of quantitative chemical analysis of bottom sediments of two groups of natural reservoirs with an assessment of their ecological state according to the results of statistical processing of the measured values were obtained. Excess concentrations of metals were recorded: for mobile forms – 2200 times for Fe, 1050 times for Mn, 35 times for Cr, 20 times for Co, up to 15 times for Ni, 5 times for Cu, 3 times for Pb, for acid-soluble forms – 45 000 times for Fe, 550 times for Pb, up to 75 times for Ni, 525 times for Mn, 105 times for Cr, 50 times for Cu, 16 times for Co. The geochemical interpretation of the results of the factor analysis is presented.

Ecological State and Mineral-Geochemical Characteristics of the Bottom Sediments of the East Siberian Sea

Oceanology ◽  
2020 ◽  
Vol 60 (4) ◽  
pp. 518-531
Author(s):  
A. Yu. Miroshnikov ◽  
M. V. Flint ◽  
En. E. Asadulin ◽  
M. D. Kravchishina ◽  
V. L. Luksha ◽  
...  
Keyword(s):  
Bottom Sediments ◽  
Geochemical Characteristics ◽  
Ecological State ◽  
East Siberian Sea

Internal phosphorus loading in selected lakes of the Cybina River valley

2010 ◽  
Vol 39 (3) ◽  
Author(s):  
Katarzyna Kowalczewska-Madura ◽  
Renata Dondajewska ◽  
Ryszard Gołdyn
Keyword(s):  
Bottom Sediments ◽  
River Valley ◽  
Phosphorus Loading ◽  
Internal Phosphorus Loading

Internal phosphorus loading in selected lakes of the Cybina River valleyThe aim of this study was to assess the ability of bottom sediments to release or accumulate phosphorus.

STATE OF NATURAL ENVIRONMENTAL COMPONENTS WITHIN THE ECOLOGICAL CORRIDOR OF THE ORDER II (THE MYSHKA RIVER VALLEY, MINSK)

2021 ◽  
pp. 73-92
Author(s):  
Elena V. Sanets ◽  
Alena P. Aucharova ◽  
Ludmila A. Kravchuk ◽  
Svetlana V. Savchenko ◽  
Halina M. Bokaya
Keyword(s):  
Bottom Sediments ◽  
Hydrological Regime ◽  
Petroleum Products ◽  
River Valley ◽  
Residual Water ◽  
Polluted Soils ◽  
Ecological Corridor ◽  
Treatment Facilities ◽  
Cadmium Lead ◽  
Favorable State

This article presents an assessment of the state of natural environment components (water, bottom sediments, soil and vegetation) within the valley complex of the Myshka River (Minsk). It is shown that in modern conditions, despite significant anthropogenic transformation, the valley complex retains a high potential for performing the necessary functions as an ecological corridor of the order II. The vegetation of the Myshka floodplain steadily retains its specificity due to the stable hydrological regime. Natural complexes here have a high ecological and recreational value. The section of the river in the middle course is in a more favorable condition, where the flow is better and the floodplain is represented by reserve green areas. A less favorable state is inherent in residual water bodies with disturbed flow in the upper course of the river, where the valley is mostly represented by areas of residential and public buildings. The river experiences the greatest load at the mouth – in the area above and below the outlet of surface wastewater treatment facilities. Here the river cannot cope with the anthropogenic load, the assimilation potential is 11–12 points, polyelement anomalies of oil products, cadmium, lead, copper and zinc are formed in the bottom sediments. The area of the Myshka River valley, located in a low riverbed floodplain, has a most polluted soils. Here, a pedogeochemical anomaly from an association of elements, including petroleum products, cadmium, nickel, zinc, lead, copper, and manganese.

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