scholarly journals Development of Integral Criteria of Separation of Reservoirs Bottom Sediments Potentially Hazardous Zones.

2016 ◽  
pp. 27
Author(s):  
Keyword(s):  
Heavy Metals ◽  
Bottom Sediments ◽  
Water Mass ◽  
Water Area ◽  
Reservoir Water ◽  
Factors Influencing ◽  
Secondary Pollution ◽  
Surface Water Modeling ◽  
Main Factors ◽  
Hazard Level

In 2011–2013 complex experiments were conducted on the Uchinsk reservoir water area during different hydrological seasons. As a result of these researches a hydrodynamic model of Uchinsk reservoir has been developed on the basis of SMS v.10.1 (Surface-water Modeling System) licensed software package by AQUAVEO LLC in 2d approximation.The main factors influencing secondary pollution caused by bottom sediments, spreading of pollutants supplied from bottom sediments, as well as possibility to control the reservoir water quality have been highlighted. Quantitative hydro/physical, hydro/dynamic, and hydro/chemical criteria for forecasting of the probability of secondary pollution caused by the reservoir bottom sediments have been developed. A concept of reservoir zoning by the hazard level of water mass secondary pollution with heavy metals during the period of conditions favorable for heavy metals output from bottom sediments. On the basis of these criteria mapping of the Uchisk reservoir water area with the use of a mathematical model has been carried out. Measures on the reduction of the reservoir secondary pollution probability have been proposed.

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.

scholarly journals Impact of typhoon Matmo (2014) on the distribution of heavy metals in Quanzhou Bay

2019 ◽  
Vol 2 (1) ◽  
pp. 209-228 ◽  
Author(s):  
Yunpeng Lin ◽  
Yunhai Li ◽  
Binxin Zheng ◽  
Xijie Yin ◽  
Liang Wang ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Metal Pollution ◽  
Heavy Metal Pollution ◽  
Surface Sediments ◽  
Scientific Management ◽  
Factors Influencing ◽  
Quanzhou Bay ◽  
Main Factors ◽  
Heavy Metal Assessment

The typhoon process has a significant influence on the distribution of heavy metals in sediments. Based on the heavy metal (V, Cr, Co, Ni, Cu, Zn, Pb, and Mn) contents in surface sediments collected under normal conditions and post-typhoon Matmo in Quanzhou Bay in 2014, the distributions, sources, and impacts of typhoon processes on heavy metals and pollution conditions were studied and discussed. The results showed that the heavy metals can be divided into two categories: Class I metals (Cu, Zn, Pb, and Mn) were mainly distributed in the estuary and significantly increased after the typhoon, and Class II metals (V, Cr, Co, and Ni) were distributed in the coastal intertidal zone and estuary and remained unchanged or decreased after the typhoon. The heavy metal assessment showed that heavy metal pollution in Quanzhou Bay was serious and tended to increase after the typhoon. The increased metal supply and enhanced riverine and tidal hydrodynamics after the typhoon may be the main factors influencing the variations in heavy metal content and distribution. This study provided a basis for the accurate evaluation and scientific management of heavy metal pollution caused by typhoon processes in Quanzhou Bay.

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.

Main criteria for assessing the content of heavy metals in bottom sediments of water bodies

2020 ◽  
pp. 34-40
Author(s):  
Boris Korzhenevskiy ◽  
Gleb Tolkachev ◽  
Nikolay Kolomiycev
Keyword(s):  
Heavy Metals ◽  
Soil Contamination ◽  
Bottom Sediments ◽  
Maximum Permissible Concentration ◽  
Pore Solution ◽  
Solid Phase ◽  
Water Bodies ◽  
Main Criterion ◽  
Important Indicator ◽  
Secondary Pollution

The main criteria for assessing the content of heavy metals in sediments of water bodies. At present, the methodology for rationing pollutants in bottom sediments of surface watercourses is clearly not sufficiently developed. There are various and significantly different approaches to the assessment of soil contamination with heavy metals. The maximum permissible concentration (MAC), which is the main criterion for assessing the levels of pollution, is not perfect and needs to be significantly adjusted. A number of methodological assessments of contamination of bottom sediments with heavy metals with comparative characteristics are considered, of which a method for estimating the anthropogenic load on a reservoir according to its geo-classes has been proposed as one of the best. The gross content of heavy metals in bottom sediments of water bodies does not give a sufficient idea of the possibility of secondary pollution of water masses and, as a result, subsequent toxic effects. A much more important indicator is their content and distribution by forms of existence in the solid phase and pore solution of bottom sediments. As a consequence, this article develops a topic for estimating possible secondary pollution of water bodies by determining the content and distribution of TM by forms of existence in the solid phase and pore sediment solution.

scholarly journals Assessment of heavy metals in modern bottom sediments on the Karadag seashore

2020 ◽  
Vol 169 ◽  
pp. 01010
Author(s):  
Anna Drygval ◽  
Polina Drygval ◽  
Elena Stanis ◽  
Vladimir Maltsev
Keyword(s):  
Heavy Metals ◽  
Bottom Sediments ◽  
Quantitative Assessment ◽  
Nature Reserve ◽  
Arsenic Concentration ◽  
Field Studies ◽  
Water Area ◽  
Nickel Lead ◽  
Concentration Limits ◽  
Geochemical Assessment

The work presents the results of quantitative assessment of heavy metals (HM) content in bottom sediments of the coastal zone near the Karadag nature Reserve. The data were obtained as a result of field studies in 2016-2018. Estimated СС and Cо coefficients and Zc were calculated. It was shown that arsenic concentration limits were exceeded everywhere in the samples. The nickel, lead, copper and zinc limits were found to have been exceeded in some locations. Ecological and geochemical assessment of water and bottom sediments quality in the section of Karadag water area has been made.

scholarly journals Development of Hydrodynamic Model and the Model of Lowland Reservoir Pollution Formation (the Klyazma Reservoir as an Example)

2013 ◽  
pp. 96-107
Author(s):  
Keyword(s):  
Heavy Metals ◽  
Bottom Sediments ◽  
Water Mass ◽  
Bottom Layer ◽  
Field Observations ◽  
Physical Chemical ◽  
Lake Zone ◽  
Lowland Reservoir ◽  
Chemical Conditions ◽  
Pollution Distribution

Results of field observations of the heavy metals and their forms content in the Klyazma Reservoir bottom sediments, as well as oxygen and temperature in the water mass have been presented. Three groups of metals have been separated according the index of mobility in bottom sediments. The two-dimension hydrodynamic mathematical model and the model of pollution distribution have been developed. They enable to forecast formation of physical/chemical conditions in bottom layer that influence the water quality formation in terms of the heavy metals group. Within the reservoir two zones have been singled out: the transit zone and the stagnation (lake) zone; each of them are characterized by different proportion of metal forms in bottom sediments due to formation of oxide and anoxide zones in the bottom layer.

Comprehensive monitoring of the Klyazma reservoir

2020 ◽  
pp. 17-25
Author(s):  
Vikenty L. Razumovsky
Keyword(s):  
Chemical Composition ◽  
Bottom Sediments ◽  
Environmental Changes ◽  
Water Area ◽  
Graphical Analysis ◽  
Anthropogenic Factors ◽  
Layer By Layer ◽  
Reservoir Water ◽  
Chemical Composition Of Water ◽  
Diatom Complexes

The research was carried out during the comprehensive monitoring of the Klyazma reservoir in 2019. The work is devoted to the assessment of long-term environmental changes under the influence of natural and anthropogenic factors. The research combines two traditional methods of analysis. A layer-by-layer study of diatomic complexes and chemical composition in the bottom sediments of the reservoir was carried out. The results obtained were compared with the results of comprehensive monitoring on the taxonomic composition of phytoplankton and the chemical composition of water in the reservoir's water area. The results of previous studies on the chemical composition of water in the reservoir were used. In addition to the traditional forms of chemical and hydrobiological analysis, an innovative method of graphical analysis was applied to phytoplankton complexes and the principle of unification of bioindication methods was applied for diatom complexes from sediment columns. The main scenarios of taxonomic proportions transformations in phytoplankton and diatom complexes were determined using the method of graphical analysis for the Klyazma reservoir water area. The transformations are caused by the influence of water from the Moscow channel and the planned annual lowering of the water level in the reservoir. Bottom sediments showed a regular increase in the reservoirs level of saprobisation. Presumably, this is due to a non-linear increase in the number of tourists and an cahnges in recreational load. Pronounced accumulation of Cu, Zn and other heavy metals in the coastal zone of the reservoir was confirmed.

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.

scholarly journals Chemical Forms of Heavy Metals in Bottom Sediments of the Mitręga Reservoir

2016 ◽  
Vol 21 (2) ◽  
pp. 15-26
Author(s):  
Lidia Dąbrowska
Keyword(s):  
Heavy Metals ◽  
Bottom Sediments ◽  
Metal Content ◽  
Water Reservoir ◽  
Open Water ◽  
Chemical Forms ◽  
Secondary Pollution ◽  
Ni Content ◽  
Cadmium And Lead ◽  
Potential Mobility

Abstract Bottom sediments originating from the Mitręga water reservoir were studied. It was assayed, in what chemical forms heavy metals (zinc, copper, nickel, cadmium and lead) occur in sediments, using the method of sequential extraction BCR. According to the geochemical criteria with respect to the content of Zn, Cu and Ni, the sediments in all measuring points were classified as uncontaminated, however because of the Cd content - as moderately contaminated. The highest Cu and Ni content was found in the sediment collected in the southern part of the reservoir, 15 and 11 mg/kg d.m, respectively. In the case of Zn, Pb and Cd, the sediment collected at the outflow of the Mitręga river was the most contaminated; metal content amounted to 136; 35; 3 mg/kg d.m., respectively. Based on the conducted fractionation of heavy metals, it was found that the potential mobility of metals, hence the possibility of secondary pollution of the reservoir open water, are arranged in the following order: Zn> Cd> Ni> Cu ~ Pb.

Content of the Heavy Metals in Water and Bottom Sediments of the Ingulets River

2008 ◽  
Vol 44 (5) ◽  
pp. 105-110 ◽  
Author(s):  
I. M. Malakhov ◽  
A. O. Bobko ◽  
T. M. Aliokhina
Keyword(s):  
Heavy Metals ◽  
Bottom Sediments
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