scholarly journals CONTENT OF HEAVY METALS IN THE SEA WATER OF THE NORTHERN CASPIAN SEA

2021 ◽  
pp. 22-29
Author(s):  
M. S. Yessenamanova ◽  
D. Zhakyayeva ◽  
A. Ryszhan ◽  
Zh. S. Yessenamanova ◽  
А. Е. Tlepbergenova ◽  
...  
Keyword(s):  
Water Pollution ◽  
Heavy Metals ◽  
Caspian Sea ◽  
Copper Content ◽  
Sea Water ◽  
Zinc Content ◽  
The Caspian Sea ◽  
Slight Excess ◽  
Maximum Value ◽  
High Concentrations

The article presents the results of chemical analysis for the content of heavy metals in the waters of the fields in the northern part of the Caspian Sea. The content of heavy metals in water is a complex and informative indicator of the degree of water pollution and can be used in environmental monitoring of water bodies. An analysis was carried out on the content of eleven heavy metals at the Kashagan, Kalamkas Kairan and Aktoty deposits for the period from 2006 to 2019. All results were averaged with indication of their minimum, maximum and average values, and were also compared with the MPC of these heavy metals. Among the eleven heavy metals, only one metal is characterized by a content below the MPC, this is barium. The barium content was determined by sweat in all samples, but at the same time they did not exceed the MPC in all samples. A slight excess of the MPC is typical for such metals as cadmium, arsenic and zinc. Almost in all samples, except for one sample, cadmium was found, but at the same time it did not exceed 0.3 MPC. The maximum value was determined in samples from the Kashagan field. Arsenic was found only in 3.4% of samples, mainly in deep-water areas of the Kalamkas field, in which the content did not exceed 1.3 MPC. The zinc content was found in most samples with no excess of more than 0.3 MPC. The rest of the elements are high and highly high in content such as mercury, lead, vanadium, chromium, copper, nickel, and iron. The content of mercury was found in the samples over 1%, but with an excess of 10 to 47 MPC. The content of lead was found in the samples over ten percent, with an excess of 11 to 60 MPC. Vanadium was found in samples of about 20%, with an excess in the range of 2-6 MPC. Chromium was found in most samples with an excess of 3 to 29 MPCs at Kalamkas in 2014 and Kashagan in 2019. Copper content was found in samples of about 90%, with high concentrations at Kashagan in 2006 and 2010 up to 10-38 MPC. Nickel is found in most samples with a level of 0.9-1.1 MPC. The content of iron was found in more than 10 percent of samples with an excess of 15-60 MPC with a decrease of almost 3 times from 2006-2010 to 2011-2019.

scholarly journals THE DISTRIBUTION OF DISSOLVED FORMS COPPER IN THE WATER COLUMN OF THE CASPIAN SEA

2018 ◽  
Author(s):  
В.В. Ковалев ◽  
С.Г. Парада
Keyword(s):  
Surface Layer ◽  
Spatial Distribution ◽  
Water Column ◽  
Caspian Sea ◽  
Sea Water ◽  
Average Content ◽  
Vital Activity ◽  
The Caspian Sea ◽  
Organic Complexes ◽  
High Concentrations

По результатам химических анализов проб воды Северного, Среднего Каспия и, частично, Южного Каспия, отобранных по профилям из различных горизонтов водной толщи, определены содержания растворенных форм меди. Построены карты пространственного распределения этого элемента в поверхностном и наддонном водных горизонтах, а также по вертикальным разрезам водной толщи, выявлены закономерности их распространения в объеме морской воды. Установлены средние содержания растворенных форм меди в поверхностном (8,6 мкг/л) и в наддонном (9,6 мкг/л) горизонтах  Каспийского моря. Выделены участки с аномально высокими (более 20 мкг/л) и аномально низкими (менее 5 мкг/л) концентрациями растворенных форм меди в них. Особенности распределения растворенных форм меди по вертикали водной толщи определяются жизнедеятельностью планктонных организмов и их отмиранием. В поверхностном слое аномально высокие концентрации меди связаны с прижизненным накоплением металла планктоном. На глубинах свыше 100 м аномально высокие ее концентрации связаны с распадом отмерших организмов и выделением меди и других металлов в виде органических комплексов According to the results of chemical analyzes of water samples from the Northern, Middle Caspian and, partially, the Southern Caspian, taken from profiles from different horizons of the water column, the contents of dissolved forms of copper were determined. Maps of the spatial distribution of this element in the surface and supra-aquatic horizons, as well as along vertical sections of the water column, have been constructed, and patterns of their distribution in the volume of sea water have been revealed. The average content of dissolved forms of copper in the surface (8.6 μg/l) and in the above bottom (9.6 μg/l) horizons of the Caspian Sea has been established. Selected areas with abnormally high (more than 20 μg/l) and abnormally low (less than 5 μg/l) concentrations of dissolved forms of copper in them. The specific features of the distribution of dissolved forms of copper along the vertical of the water column are determined by the vital activity of planktonic organisms and their death. In the surface layer, abnormally high concentrations of copper are associated with the lifetime accumulation of metal by plankton. At depths above 100 m, its abnormally high concentrations are associated with the decay of dead organisms and the release of copper and other metals in the form of organic complexes

scholarly journals Evaluation of the Biodegradation of Petroleum Contaminants by Pseudomonas Aeruginosa in the Caspian Sea Coastline Waters

2019 ◽  
Vol 13 (3) ◽  
pp. 21-26
Author(s):  
Samira Mehrdad ◽  
◽  
Keivan Saeb ◽  
Lobat Taghavi ◽  
Masood Ghane ◽  
...  
Keyword(s):  
Pseudomonas Aeruginosa ◽  
Caspian Sea ◽  
Sea Water ◽  
Culture Media ◽  
Total Petroleum Hydrocarbons ◽  
The Caspian Sea ◽  
Experimental Conditions ◽  
Sustainable Resources ◽  
Life On Earth ◽  
Predominant Strain

Background: Water plays an essential role in supporting life on earth and sea worldwide, requiringclean, safe, high quality and sustainable resources. Nowadays, many water resources have been contaminatedwith toxic compounds originating from petroleumdue to economical and industrial developments. There is anurgent need to clean up the waters with environmentally friendlyand inexpensive methods. This study investigated the biodegradation of total petroleum hydrocarbons (TPH) using Pseudomonas aeruginosa (P. aeruginosa) in southern Caspian Sea coastline. Methods: Coastline sediment samples were collected, with P. aeruginosa being the predominant strain. The bacteria were cultured in triplicates in the presence of 0.5, 1, 2 and 4% of gasoline andunder specific experimental conditions of varying temperature, pH, salinity, shaker speed, and incubation periods. The data representing the gasoline biodegradation in the samples were statistically analyzed. Results: At optimized experimental conditions for temperature, pH, salinity, incubation period, and shaker speed, maximum biodegradation of TPH was achieved by culturing P. aeruginosa strains with the sea water samples containing varying concentrations of gasoline. Conclusion: The gram-negative bacteria, P. aeruginosa, almost completely biodegraded TPH contaminants from the samples’ culture media over 28 days of incubation. We conclude that the use of P. aeruginosa is an efficient method for the biodegradation of Caspian coastal waters contaminated with TPH.

Distribution and ecological risk assessment of heavy metals in surface sediments along southeast coast of the Caspian Sea

2014 ◽  
Vol 81 (1) ◽  
pp. 262-267 ◽  
Author(s):  
Kazem Darvish Bastami ◽  
Hossein Bagheri ◽  
Vahid Kheirabadi ◽  
Ghasem Ghorbanzadeh Zaferani ◽  
Mohammad Bagher Teymori ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Risk Assessment ◽  
Ecological Risk ◽  
Ecological Risk Assessment ◽  
Caspian Sea ◽  
Surface Sediments ◽  
The Caspian Sea ◽  
Southeast Coast

Flocculation of heavy metals during mixing of freshwater with Caspian Sea water

2007 ◽  
Vol 53 (8) ◽  
pp. 1811-1816 ◽  
Author(s):  
A. R. Karbassi ◽  
J. Nouri ◽  
N. Mehrdadi ◽  
G. O. Ayaz
Keyword(s):  
Heavy Metals ◽  
Caspian Sea ◽  
Sea Water

scholarly journals Caspian Sea Level changes based on Satellite altimetry

2021 ◽  
Author(s):  
Omid Memarian Sorkhabi
Keyword(s):  
Sea Level ◽  
Caspian Sea ◽  
Satellite Altimetry ◽  
Sea Water ◽  
Sea Level Change ◽  
High Accuracy ◽  
Research Data ◽  
Sea Level Changes ◽  
The Caspian Sea ◽  
Level Change

Abstract Today, despite the satellite altimetry, it is possible to determine the average sea level and determine the sea level change with high accuracy. In this research, data from 1992-2017 TOPEX / Poseidon, Jason1, OSTM and Jason3 altimeter satellites in the Caspian Sea have been used. The results show that every year the average of 75 mm of the Caspian Sea water level decreases and the downward trend.

scholarly journals Caspian Sea Level changes based on Satellite altimetry

2021 ◽  
Author(s):  
Omid Memarian Sorkhabi
Keyword(s):  
Sea Level ◽  
Caspian Sea ◽  
Satellite Altimetry ◽  
Sea Water ◽  
Sea Level Change ◽  
High Accuracy ◽  
Research Data ◽  
Sea Level Changes ◽  
The Caspian Sea ◽  
Level Change

Abstract Today, despite the satellite altimetry, it is possible to determine the average sea level and determine the sea level change with high accuracy. In this research, data from 1992-2017 TOPEX / Poseidon, Jason1, OSTM and Jason3 altimeter satellites in the Caspian Sea have been used. The results show that every year the average of 75 mm of the Caspian Sea water level decreases and the downward trend.

DETERMINATION OF HEAVY METALS IN WATER SAMPLES TAKEN FROM THE SHIKH AREA OF THE CASPIAN SEA USING ICP-MS (7500CX) DEVICE

Alchemist ◽  
2020 ◽  
Vol 1 (2) ◽  
pp. 19-24
Author(s):  
S.R. Hajiyeva ◽  
◽  
T.I. Aliyeva ◽  
N.M. Cafarova
Keyword(s):  
Heavy Metals ◽  
Environmental Monitoring ◽  
Water Samples ◽  
Caspian Sea ◽  
Research Laboratory ◽  
Marine Water ◽  
The Caspian Sea ◽  
Icp Ms ◽  
Analytical Research

Water samples were taken from the Shikh shore of the Caspian Sea to conduct the research. In the marine water samples taken from the area, heavy metals were identified using the Agilent 7500 Series ICP-MS device. The analyzes were performed in the Complex Analytical Research Laboratory of the National Department of Environmental Monitoring

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