scholarly journals Influence of Bottom Sediments Physicochemical Characteristics on Distribution of Microelements in the Crimean Shelf Water Areas

2020 ◽  
Author(s):  
E. A. Kotelyanets ◽  
K. I. Gurov ◽  
◽  
Keyword(s):  
Heavy Metals ◽  
Trace Elements ◽  
Spatial Distribution ◽  
Organic Carbon ◽  
Bottom Sediments ◽  
Clay Fraction ◽  
Zinc Content ◽  
Physicochemical Characteristics ◽  
Water Area ◽  
Pollution Level

The paper presents the results of studies of the Kalamitsky Bay bottom sediments pollution level with microelements and heavy metals (Pb, Zn, Cu, Ni, Co, Cr, V, As, Sr, Ti, Fe, Mn) in comparison with the content of these microelements and heavy metals in the Balaklava Bay sediments. The paper analyzes data obtained during expeditions on the R/V Professor Vodyanitsky in the Kalamitsky Gulf in August 2011 (seaward part) and on the R/V Rioni in September 2012 (coastal area) as well as in the Balaklava Bay in October 2018. Content of microelements and heavy metals in bottom sediments of the studied water areas was determined by the X-ray fluorescence method using Spectroscan MAX-G device. For the water area of the Kalamitsky Gulf, the features of the studied trace element spatial distribution are considered, groups of trace elements with different spatial distribution patterns are identified. The correlation analysis determined influence of physicochemical characteristics of the sediments on distribution and accumulation of trace elements. In the water area of the Kalamitsky Gulf, a statistically significant correlation was observed of nickel, iron and zinc content with the clay fraction; dependance of increased concentrations of zinc, nickel and chrome on the content of organic carbon and predominance of lead in highcarbonate sediments. For the Balaklava Bay, the maximum positive values of correlations with the pelitic-silty fraction were noted for iron, manganese, vanadium and chrome; organic carbon correlates with chrome, iron, nickel and copper, whereas carbonates correlate with strontium. Similar patterns were observed earlier in the Sevastopol region bays, Feodosiya Gulf and Kerch Strait.

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

scholarly journals Criterion for the assessment of the ecological condition of bottom sediments (on the example of the Brest region)

2019 ◽  
Vol 54 (4) ◽  
pp. 455-466
Author(s):  
L. N. Ryabova ◽  
I. A. Zalygina
Keyword(s):  
Trace Elements ◽  
Bottom Sediments ◽  
Petroleum Products ◽  
Ecological Condition ◽  
Pollution Level ◽  
Satisfactory Condition ◽  
Geochemical Parameters ◽  
Drainage Channels ◽  
Copper Zinc ◽  
Surrounding Landscape

Geochemical parameters of bottom sediments allow quick estimating the state of the environment within the catchment of watercourses, as the composition of bottom sediments inherits the geochemical features of the components of the surrounding landscape. New data on the content of trace elements, sulfates, chlorides, nitrates, petroleum products, synthetic surfactants and phenols in the bottom sediments, obtained during complex geochemical studies in the Brest region, are presented. The concentration levels of the determined ingredients for sediments of the main types of reservoirs were determined. The maximum accumulation of nitrogen compounds, chlorides, phosphates and trace elements (nickel, cobalt, vanadium, chromium, copper, zinc and manganese) was marked in the sediments of rivers, while sulfates and lead are concentrated to a greater extent in the bottom sediments of the drainage channels. The map of pollution of bottom deposits of the territory of the Brest region of scale 1:200000 was constructed. It was found that the geochemical state of bottom sediments in the reservoirs of the Brest region is mainly in satisfactory condition, the degree of pollution by heavy metals was estimated as permissible with only 3.0 % belonging to the category of dangerous pollution level.

scholarly journals ANALYSIS AND ASSESSMENT OF HEAVY METALS CONCENTRATIONS IN NEMUNAS RIVER BOTTOM SEDIMENTS AT ALYTUS CITY TERRITORY

2015 ◽  
Vol 23 (2) ◽  
pp. 147-154 ◽  
Author(s):  
Vaidotas VALSKYS ◽  
Roberta VALSKIENĖ ◽  
Gytautas IGNATAVIČIUS
Keyword(s):  
Heavy Metals ◽  
Spatial Distribution ◽  
Bottom Sediments ◽  
Anthropogenic Impact ◽  
River Sediments ◽  
Left Bank ◽  
River Ecosystem ◽  
X Ray ◽  
Left And Right ◽  
River Bottom

Concentrations and spatial distribution of heavy metals on the left and right banks of the river Nemunas bottom sediments are analyzed in this article. The research methodology of X-ray fluorescence spectrometry for bottom sediments and operating principles of XL2 spectrometer used for analysis are overviewed. The results of analysis are presented and compared with LAND 20-2005 requirements as well as studies that were carried out previously. The influence of Alytus city for Nemunas river sediments quality is assessed. Dischargers formed additional samples which were taken and included to the list of ordinary samples. The trend of heavy metals (Cd, Cu, Cr) concentrations showed the growth of pollution downstream the urban area. The estimated Zd (total pollution) values clearly indicated higher contamination by heavy metals on the left bank of Nemunas River. Extensive surveys of river sediments allow assessing the extent of anthropogenic impact, which can be harmful to the river ecosystem and human health.

scholarly journals Bioaccumulation of heavy metals in the dice snake Natrix tessellata (Reptilia, Colubridae) from ecosystems of different anthropogenic loads in modern conditions of the steppe Dnieper area

2019 ◽  
Vol 30 (2) ◽  
pp. 113-117
Author(s):  
S. V. Yermolenko ◽  
V. Ya. Gasso ◽  
A. M. Hagut ◽  
I. A. Hasso ◽  
V. A. Spirina
Keyword(s):  
Heavy Metals ◽  
Trace Elements ◽  
Bone Tissue ◽  
Thermal Power ◽  
Zinc Content ◽  
Atomic Absorption Spectrophotometry ◽  
Natural Ecosystems ◽  
Lead Zinc ◽  
Nature Park ◽  
Cadmium Lead

We studied the peculiarities of bioaccumulation and distribution of heavy metals (cadmium, lead, zinc and copper) in the bone tissue, liver and kidneys of the dice snake Natrix tessellata (Laurenti, 1768) inhabited ecosystems under different anthropogenic loads in 2015-2016. Mature individuals were caught in anthropogenically transformed ecosystems of the sanitary-protective zone of the Dniprovska Thermal Power Plant (SPZ DTPP) (48.402°N, 35.111°E, n = 7), coastal ecosystems of the National Nature Park «Velykyi Luh» (47.443°N, 35.149°E, n = 8) and in the Maiorka gully ecosystems (48.260°N, 35.170°E, n = 7). The gross content of metals in the organs of N. tessellata was determined after their dry ashing in a muffle furnace. Determination of the trace elements was performed by atomic absorption spectrophotometry. Among the studied trace elements, zinc has the highest concentrations in the liver, kidneys and bones of N. tessellata. The kidneys and liver are characterized by such amount of concentrations: Zn> Cu> Pb> Cd, but bone tissue has the following ratio Zn> Pb> Cu> Cd. The highest concentration of cadmium is found in the kidneys, and the lowest one – in the bones of snakes. There are the highest contents of lead and copper in the snakes’ liver, but the lowest in the kidneys and bones. The lead bioaccumulations in organs of snakes from different ecosystems are dissimilar. Zinc content in bones is higher than in kidneys and liver, but the lowest concentration is found in the kidneys. It has been found that the highest contents of toxic metals (Cd, Pb) were in the kidneys and liver of the snakes dwelled in the SPZ DTPP ecosystems in comparison with both studied natural ecosystems. In addition, snakes caught in anthropogenically transformed ecosystems of SPZ DTPP are characterised by increased zinc content in all studied organs and enlarged copper concentration in the kidneys. Considering the obtained results on the metals bioaccumulation, the dice snake can be considered as a potential bio-indicator of environmental pollution by heavy metals.

scholarly journals The sedimentology of the modern lagoons in the Western Peloponnesus

2017 ◽  
Vol 44 ◽  
pp. 1
Author(s):  
N. Kontopoulos ◽  
N. Bouzos
Keyword(s):  
Organic Carbon ◽  
Bottom Sediments ◽  
Organic Material ◽  
Clay Fraction ◽  
Low Energy ◽  
Tidal Range ◽  
Dominant Type ◽  
Wind Action ◽  
Average Value ◽  
Hydraulic Mechanism

The Gulfs across of the western Peloponnese are characterized by lagoons. These are located between promontories, in coastal areas where the tidal range is very low. The studied lagoons are very shallow and the sandy mud lithology is the dominant type of the lagoonal bottom sediments. The main hydraulic mechanism for the distribution of the bottom sediments is the winnowing effect by wind action. Further, the studied sediments are characterized as very poorly to extremely poorly sorted and, therefore, the lagoonal environment is one of a very low energy. In this environment the velocity of the depositional agent either fluctuates wide or presents greater consistency. In the bottom sediments, the carbonate and organic material are mostly clastic with an average value of about 35% and 3% respectively. The presence of an abundant clay fraction in the lagoonal sediments allows the precipitation of organic carbon. The latter should be always evaluated when solution to environmental problems is required.

scholarly journals Ecological assessment of heavy metal pollution of groundwater in Kyiv region

2021 ◽  
pp. 88-97
Author(s):  
I. Shumigay ◽  
O. Yermishev ◽  
N. Маnіshеvskа
Keyword(s):  
Heavy Metals ◽  
Trace Elements ◽  
Drinking Water ◽  
Human Body ◽  
Total Concentration ◽  
Environmental Pollutants ◽  
Zinc Content ◽  
Chemical Pollution ◽  
Long Term Effects ◽  
Human Environment

In recent years, as a result of intense anthropogenic impact, the composition of groundwater has changed markedly. Despite the relatively high protection of groundwater from pollution, the content of pollutants is detected in significant quantities. One of the priority groups of chemical pollution is heavy metals, which belong to an important group of environmental pollutants. Depending on the forms of being in the water, they differ in their chemical and biological activity. Currently, determining the quality of groundwater, identification of trace elements is a topical issue. This article presents the results of research on the content of trace elements in groundwater. Analysis of the content of heavy metals in the wells of Kyiv region during 2020 shows that a significant excess of water pollution by heavy metals is not observed. Taking into account the current MPC, a small excess of iron and zinc content was noted in Volodarskyi district. Heavy metals are known to have mutagenic, toxic effects and affect the intensity of biochemical processes. But the toxicity of trace elements is determined not by their total concentration in water, but by the forms of finding. Therefore, the presence of VM in drinking water samples is highly undesirable, as there will be a constant supply of chronic doses to the human body. As a result, it became necessary to calculate the total pollution of heavy metals, groundwater samples in Kyiv region. In addition, the ecological state of the environment is directly related to changes in the internal human environment. It is the deficiency or excess of certain microelements in drinking water or non-observance of its stable chemical composition in certain areas that from time to time outbreaks of diseases, the cause of which is difficult to establish. Heavy metals that can be found in drinking water are very harmful to human health. The most dangerous Cd, Pb, because on the one hand their man-made accumulation in the environment is quite high, and on the other — these elements have a significant affinity for physiologically important organic compounds and can inhibit the most important metabolic processes, inhibit growth and development. Their long-term effects on the human body can lead to the development of cancer, damage to organs, the nervous system, and in extreme cases, to death, as noted in the publication.

scholarly journals ASSESSMENT OF THE MODERN STATE OF THE BOTTOM SEDIMENTS IN PORT TEMRYUK

2021 ◽  
Vol 49 (1) ◽  
pp. 53-67
Author(s):  
R. R. Agletdinov ◽  
I. Yu. Matasova
Keyword(s):  
Heavy Metals ◽  
Bottom Sediments ◽  
Statistical Processing ◽  
Petroleum Products ◽  
Water Area ◽  
Modern State ◽  
Sea Of Azov ◽  
The Sea Of Azov

The article analyzes the dynamics of changes in the content of petroleum products and a number of heavy metals (Fe, Cu, Zn, Pb, Cd) in the bottom sediments of the port of Temryuk in 2016–2020. Fluctuations in the concentrations of petroleum products in the soil from 88 to 413 mg/kg, iron – 8.4–41.0 mg/kg, copper – 13.6–116.0 mg/kg, zinc – 58.2–415.0 mg/kg, lead – 14.0–55.3 mg/kg, cadmium from less than 0.1 to 0.2 mg/kg were revealed. The geochemical features of the bottom sediments of the port of Temryuk relative to the sediments of the Sea of Azov are determined. Statistical processing of the obtained data made it possible to determine the correlation between the concentration of the substances in question in the soils of the studied water area.

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