scholarly journals Heavy metals in the bottom sediments of the Tendrivska bay

2020 ◽  
Vol 16 (3) ◽  
pp. 53-63
Author(s):  
V.O. YEMELIANOV ◽  
Ye.I. NASEDKIN
Keyword(s):  
Heavy Metals ◽  
Particle Size ◽  
Black Sea ◽  
Bottom Sediments ◽  
Biosphere Reserve ◽  
Water Area ◽  
Coastal Sediments ◽  
Hydrodynamic Characteristics ◽  
The Black Sea ◽  
Water Supply Systems

The article describes several research results of geoecological direction, which included field sampling of bottom sediments, soils, coastal sediments at different sites within the territory of the Black Sea Biosphere Reserve NAS of Ukraine, in particular, the Tendrivska and Yahorlitska bays. The complex of the laboratory works included determination of chemical, microelement, particle size distribution composition of samples and study of their material characteristics on a scanning electron microscope. The study of the ecological state of the Reserve’s bottom sediments, as well as comparison of pollutant content in sediments of various parts of the protected water area was based, in particular, on determining the concentrations a few heavy metals (copper, nickel, zinc, lead, tin). The choice of research objects was determined by the peculiarities of the organization of agricultural activities within the arable lands bordering the boundaries of this reserve. The results obtained showed a significant impact of the geomorphological structure of the area and hydrodynamic characteristics of certain areas of the water area within it on the distribution of the material component of bottom sediments. The mineral and particle-size composition of bottom sediments should be considered the main factor in the uneven distribution of microelement concentrations, which in turn is determined by the location of zones of coastal erosion and sediment accumulation. Insignificant relative excesses of the copper content in the surface layer of the bottom sediments of the water area, fixed in the northern part of the Tendrivska Bay, can be connected with the discharge of fresh water from the network of canals, which is part of the agro complexes for rice cultivation, as well as “tailings” of water from the water supply systems of the Krasnoznam’yanska irrigation system. Studies have also shown that the content of most heavy metals in the upper layer of bottom sediments in the Black Sea Biosphere Reserve is lower than the average figures for modern Black Sea bottom sediments presented in literature sources.

Organic Matter of Bottom Sediments of the Crimean and Caucasian Coasts (Azov and Black Seas)

2021 ◽  
Author(s):  
E. A. Tikhonova ◽  
Keyword(s):  
Organic Matter ◽  
Black Sea ◽  
Bottom Sediments ◽  
Petroleum Hydrocarbons ◽  
Water Area ◽  
The Black Sea ◽  
Pollution Level ◽  
Sea Of Azov ◽  
The Caucasus ◽  
The Sea Of Azov

As part of the 113th cruise of the R/V “Professor Vodyanitsky”, research was conducted on organic pollution of bottom sediments in the coastal areas of Crimea and the Caucasus, as well as the water area in front of the Kerch Strait. Concentration of chloroformextractable substances was determined by the weight method and that of petroleum hydrocarbons was determined using infrared spectrometry. Both in 2020 and 2016 (the 83d cruise of the R/V “Professor Vodyanitsky”), properties of the bottom sediments of the Crimean and Caucasian coasts were typical of the marine soils of this region. This indicates that the studied water areas are generally in good condition. In accordance with the regional classification of bottom sediment pollution, the maximum concentrations of chloroform-extractable substances obtained for both the Black Sea and the Sea of Azov coast indicate pollution level III (23% of analysed samples). These values were found in bottom sediments in the Sevastopol water area (225 mg·100 g-1), in the coastal area of Cape Tarkhankut (120 mg·100 g-1) and Karadag (120 mg·100 g-1), the southern part of the Sea of Azov (125 mg·100 g-1) and Tuapse (110 mg·100 g-1). The content of chloroform-extractable substances in bottom sediments off the Black Sea coast of the Caucasus and the Sea of Azov coast is slightly lower than that off the Crimean coast. Pollution level II is assigned to bottom sediments in 46 % of the samples, with an average concentration of 72 mg·100 g-1 of air-dry solids. The rest (31 %) of the studied area was classified as conditionally clean (pollution level I, i. e. less than 50 mg·100 g-1). There has been a slight increase in the concentration of petroleum hydrocarbons in the bottom sediments of both the Black Sea and the Sea of Azov and their share in the total amount of chloroformextractable substances. In general, the level of pollution of bottom sediments by organic matter remained unchanged if compared with previous years, in particular with the data from 2016

Heavy metals in sinking particles and bottom sediments from the eastern Turkish coast of the Black Sea

2008 ◽  
Vol 78 (2) ◽  
pp. 396-402 ◽  
Author(s):  
H.A. Ergül ◽  
S. Topcuoğlu ◽  
E. Ölmez ◽  
Ç. Kırbaşoğlu
Keyword(s):  
Heavy Metals ◽  
Black Sea ◽  
Bottom Sediments ◽  
The Black Sea ◽  
Sinking Particles

ASSESSMENT OF TOXICITY AND POLLUTION OF BOTTOM SEDIMENTS IN THE NORTHWESTERN PART OF THE BLACK SEA WITH HEAVY METALS

2017 ◽  
Vol 22 (2(41)) ◽  
pp. 41-51
Author(s):  
С. Е. Дятлов ◽  
А. В Кошелев ◽  
С. А. Запорожец ◽  
Е. А. Лукьянова
Keyword(s):  
Heavy Metals ◽  
Black Sea ◽  
Bottom Sediments ◽  
The Black Sea ◽  
Northwestern Part

scholarly journals Organic substances of sea bottom sediments in conditions of the coast urbanization (for example Kazachiya Bay, The Black Sea)

2019 ◽  
Vol 59 (2) ◽  
pp. 234-242
Author(s):  
O. V. Soloveva ◽  
E. A. Tikhonova ◽  
T. L. Klimenko ◽  
G. V. Skrupnik ◽  
T. V. Votinova
Keyword(s):  
Black Sea ◽  
Bottom Sediments ◽  
Polyaromatic Hydrocarbons ◽  
Petroleum Products ◽  
Water Area ◽  
The Black Sea ◽  
Sea Bottom ◽  
Adverse Environmental Conditions ◽  
Coastal Urbanization ◽  
The Impact

The data on the hydrocarbons compound in the sea bottom sediments of adjacent water area to the zone of mass cottage building (Kazachiya Bay, the coast of Sevastopol, the Black Sea) are given. As a result of the survey conducted in the summer of 2015, pH, Eh, natural moisture, chloroform extractable substances, oil hydrocarbons, petroleum products, polyaromatic hydrocarbons and n-paraffins in the sea bottom sediments of the water area were determined. Areas with unfavorable and moderately adverse environmental conditions are identified. The impact of coastal urbanization on the deterioration condition of the sea bottom sediment is shown.

scholarly journals Monitoring of the cyanobacteria composition in bottom sediments of the water area of the Black and Azov seas along the coast of Crimea

2021 ◽  
pp. 107-117
Author(s):  
N.A. Andreeva ◽  
Keyword(s):  
Black Sea ◽  
Bottom Sediments ◽  
Coastal Waters ◽  
Euphotic Zone ◽  
Water Area ◽  
The Black Sea ◽  
Sea Of Azov ◽  
Entire Study ◽  
The Sea Of Azov ◽  
Pigment Complex

As a result of laboratory cultivation of bottom sediment samples taken during six expeditions at oceanographic stations of the coastal waters of the Black and Azov Seas located along the coast of Crimea in different seasons of 2019‒2020, preliminary results on the distribution of cyanobacteria in the benthos of these areas were obtained. The development of cultivated forms of cyanobacteria was observed in 65 Black Sea samples at 54 stations and in all samples from the Sea of Azov. In the benthos of the Black and Azov Seas areas, representatives of 11 and 10 genera of cyanobacteria were identified, respectively, belonging to four orders: Synechococcales (Synechococcus, Rhabdoderma, Aphanocapsa, Merismopedia, Leptolyngbya), Chroococcales (Microcystis, Chroococcus), Oscillatoriales (including Spirulina), Nostocales (Anabaena, Nostoc, Scytonema). Representatives of the genus Microcystis were the most common in the bottom sediments of the Black Sea coast of Crimea, whereas in the Sea of Azov they were Microcystis and Oscillatoriales. Cyanobacteria with a deep violet color were often found, which indicates the predominance of phycoerythrin in the pigment complex of these cyanobacteria. The maximum number of cultivated forms of cyanobacteria in the bottom sediments of the Black Sea during the entire study period was registered in the euphotic zone, and the lowest – in the 100–1000 m zone. 40 batch cultures were obtained, from which new strains of cyanobacteria are be isolated. In the future, the research results can be used to monitor the ecological state of the coastal waters, while the isolated cyanobacteria strains can also be used for genetic, biotechnological, medical and other research.

scholarly journals BIOGENIC SILICA SEDIMENTATION ON THE SHELF AND CONTINENTAL SLOPE OF THE BLACK SEA

2021 ◽  
pp. 79-89
Author(s):  
O.P. Olshtynska ◽  
G.M. Ivanova ◽  
I.I. Pustovoit
Keyword(s):  
Continental Slope ◽  
Black Sea ◽  
Bottom Sediments ◽  
Practical Importance ◽  
Water Area ◽  
The Black Sea ◽  
Formation Processes ◽  
Marine Geology ◽  
Wide Range ◽  
Material Input

Investigation of the marine sediments processes, regularities of their accumulation in the inland seas is one of the main tasks of marine geology and sedimentology. Biogenic sedimentation is extremely important in the general sediment deposition cycle in the Black Sea basin. This article provides an overview of the literature and analysis of our own research of the distribution of biogenic siliceous deposits in Holocene bottom sediments on the shelf and continental slope of the Black Sea. The composition and conditions of biosilicates formation, their relationship with coccolithic silts and sapropels in sedimentary strata, sources and forms of siliceous biogenic matter input, the dynamics of transformation of modern bottom sediments, as well as the influence of various environmental factors on the process of sedimentary accumulation of silica in the Black Sea basin in the late quarter are considered. The relevance of the topic is caused by insufficient coverage of a number of issues regarding the sources of mobilization and the nature of material input, the features of the origin and deposition of silicate biogenic matter in the basin, paleogeoecological factors that influenced on sedimentogenesis in the late Quarter. The study of the formation processes of modern bottom sediments in a wide range of facies conditions is of undoubted practical importance for diverse geological, sedimentological and facies research, both fundamental and applied, related to prospecting, exploration and exploitation of minerals, as well as for using the results obtained in the development of marine water area.

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