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 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.

Significance of Mineralogical and Lithologic-Petrographical Rank in the Ranking of Geological Information

2020 ◽  
Vol 42 (4) ◽  
pp. 33-49
Author(s):  
O.V. CHEPIZHKO ◽  
V.V. YANKO ◽  
V.M. KADURIN ◽  
I.M. NAUMKO ◽  
S.M. SHATALIN
Keyword(s):  
Fluid Flow ◽  
Black Sea ◽  
Bottom Sediments ◽  
Oil And Gas ◽  
Sedimentary Cover ◽  
Geochemical Characteristics ◽  
The Black Sea ◽  
Flow Parameters ◽  
Geochemical Parameters ◽  
Geological Information

For the first time the importance of mineralogical and lithological-petrographical ranks in the line of geological information ranks is substantiated for implementation of long-term forecasts, standard and non-standard approaches to research of physical and geochemical parameters as a basis of creation of complex system of forecast criteria and prospecting indicators of hydrocarbons within the sedimentary cover of Black sea based on the theory of global fluid-flows derivation. These criteria have different sensitivity to the object (hydrocarbon deposits) and are therefore ranked. The ranking determined the following parameters: 1) seismic data within the object, obtained by the method of deep seismic sounding, RWM SDP; 2) parameters of tectono-geodynamic structures; 3) the main characteristics of sedimentary cover and bedrock; 4) geochemical characteristics; 5) parameters of mineral complexes and fluid inclusions in mineral neoformations; 6) the value of the distribution of meiobenthos. Based on modern views of oil and gas geology, structural-tectonic and lithological-facies criteria are among the main ones. The study of the mineralogical component of sediments is made with using mineralogical, thermobarogeochemical and X-ray spectral methods. Fixation of anomalies of fluid flow at the bottom of the Black Sea as to the distribution of abiotic parameters in order to assess the prospects of oil and gas is determined by structural and tectonic features and high permeability of fluid flow; parameters of mineral complexes (minerals, facies) and genetic connections; heterogeneity of geochemical characteristics of bottom sediments; the presence of hydrocarbon inclusions in authigenic minerals of bottom sediments.

Estimation of Trace Elements in Gingival Crevicular Fluid and Serum-Comparative Study in Healthy and Periodontitis

2017 ◽  
Vol 9 (5) ◽  
Author(s):  
Bhagavathami Meenaksh ◽  
Chitraa R. Chandran ◽  
Aravindhan Thathchari Ranganathan ◽  
Kavindapadi Venkateswaran Rama ◽  
Valarmathy Srinivasan
Keyword(s):  
Trace Elements ◽  
Inductively Coupled Plasma ◽  
Gingival Crevicular Fluid ◽  
Serum Zinc ◽  
Cross Sectional Study ◽  
Serum Copper ◽  
Cross Sectional ◽  
Inductively Coupled ◽  
Significant Difference ◽  
Copper Zinc

Background: This study aims to determine and compare the levels of trace elements copper, zinc, selenium and chromium in GCF and serum of patients with periodontitis and healthy individuals. Methods: This cross sectional study includes 24 study subjects recruited from the patients reporting to the Department of Periodontics , Tagore Dental College Chennai. All the selected patients were subjected to a clinical examination done by a single examiner. The estimation of trace elements Copper, Zinc, Selenium and Chromium in GCF and serum is performed using Perkin Elmer optima 5300 Inductively Coupled Plasma Emission Spectrometer (ICPOES). Results: GCF and serum copper levels showed no significant difference in both periodontitis and healthy groups . Selenium levels tend to be the same in both groups. Serum zinc levels are more in periodontitis patients than healthy subjects (p less than 0.01). GCF chromium levels are found to be more in patients with periodontitis than healthy. Conclusions : More research is therefore needed to monitor the role of these trace elements C with an increased sample size to ascertain whether they are associated with a reduced risk of periodontitis.

Isotope and geochemical parameters of hydrocarbon gases in bottom sediments of the shelf of the East Siberian Sea

2016 ◽  
Vol 469 (2) ◽  
pp. 864-866 ◽  
Author(s):  
A. I. Gresov ◽  
N. E. Shakhova ◽  
V. I. Sergiyenko ◽  
A. V. Yatsuk ◽  
I. P. Semiletov
Keyword(s):  
Bottom Sediments ◽  
Hydrocarbon Gases ◽  
Geochemical Parameters ◽  
East Siberian Sea

scholarly journals Migration of heavy metals in system of coastal soil – bottom sediments – plants of the Khodtsa river during summer mean water in 2019

2020 ◽  
Vol 2020 (2) ◽  
pp. 67-74
Author(s):  
Zhanna Sergeevna Makakhaniuk ◽  
Valentina Mikhailovna Zubkova ◽  
Lyubov Anatolievna Rozumnaya
Keyword(s):  
Heavy Metals ◽  
Bottom Sediments ◽  
Aquatic Vegetation ◽  
River Mouth ◽  
Petroleum Products ◽  
Small River ◽  
Laboratory Research ◽  
Intermediate Point ◽  
Higher Aquatic Vegetation ◽  
Environmental Monitoring System

The article describes the purpose of the work, which is determining the distribution and relationships between the composition of pollutants in coastal soil, bottom sediments and higher aquatic vegetation in the small river Khodtsa. There have been presented the data of the laboratory research based on the results of the field work onselecting samples, on concentration of toxicants (cadmium, lead, iron, nitrogen, ammonium and petroleum products) in deposit media, as well as in Carex aquatilis plants of the small river Hodza. This plant species is limiting throughout the river due to the low intensity of biological absorption. The studies were carried out during the summer low water season in 2019 on the river section from the source (Elektrostal city) to the river mouth in the area of Pavlovsky Posad. In all the studied objects there have been found increased concentrations of iron. In the coastal ground and bottom sediments the pollution with heavy metals is manifested to a much greater extent: at the source and intermediate point. Petroleum products and ammonia nitrogen are distributed unevenly in space. A correlation analysis of the experimental data obtained in the components of the environment of the studied territory (the Khodtsa river) was performed. In general, the highest measurement results are observed in the upper reaches of the small river Khodtsa in the industrial city of Elektrostal. The obtained data on the heavy metals migration in the system “сoastal ground – bottom sediments – higher aquatic vegetation” of the small river Khodtsa can be successfully used as indicators an environmental monitoring system and serve as the basis for organizing further research, as well as for developing a strategy for environmental management and environmental protection in the Moscow Region.

Sign in / Sign up

Export Citation Format

Share Document