Features of Heavy Metals Accumulation in Bottom Sediments of the Southern Bug Hydroecosystem

Mitryasova, Olena; Koszelnik, Piotr; Gruca–Rokosz, Renata; Smirnov, V Pavel; Smirnova, Svietlana; Bezsonov, Yevhen; Zdeb, Monika; Ziembowicz, Sabina

doi:10.12911/22998993/118299

Cited by 10 publications

(8 citation statements)

References 7 publications

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“…The pollution of the Black Sea with metals is a major environmental challenge (Strezov 2008). Metal elements are introduced into the marine environment by natural geological processes, rivers or direct discharge of industrial waste (Mitryasova et al 2020). Recent studies have revealed variable average concentrations of metals in seawater and surface sediments from the Bulgarian Black Sea coastal zone and pollution hotspots were designated (Peycheva et al 2017;Doncheva et al 2020).…”

Section: Discussionmentioning

confidence: 99%

Trace metal accumulation in tissues of wedge clams from sandy habitats of the Bulgarian Black Sea coast

Bachvarova¹,

Stancheva²,

Ignatova-Ivanova³

et al. 2022

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The aim of the present study was to carry out an initial screening of trace metals bioaccumulation in soft tissues of the wedge clam (Donax trunculus Linnaeus, 1758) from different localities of the Bulgarian Black Sea coastal area and to evaluate the bioindicator potential of this species. Wedge clams were collected in June and September 2020 from sublittoral sandy habitats at different localities of the Bulgarian Black Sea coast. Soft tissues of individual clams were digested with nitric acid followed by ICP-OES analytical determination. The content of trace metals in the wedge clams differed significantly amongst localities. Higher metal content was present in wedge clams from Sveti Vlas, Shkorpilovtsi, Slanchev Bryag, Ahtopol and Kranevo. The highest values of lead (Pb) (2.51 mg/kg) and cadmium (Cd) (0.32 mg/kg) were found in samples from Sveti Vlas and the highest concentration of copper (Cu) (34.12 mg/kg), iron (Fe) (269.52 mg/kg) and nickel (Ni) (0.32 mg/kg) were detected in wedge clams from Shkorpilovtzi. Maximum content of chromium (Cr) (0.58 mg/kg) was present in samples from Slanchev Bryag, together with high values of Fe. The highest concentration of zinc (Zn) (18.04 mg/kg) together with high values of Cr and Fe were measured in wedge clams from Irakli. In conclusion, the wedge clams from the localities known to have higher coastal inflows and touristic pressures, i.e. Varna, Shkorpilovtzi, Sveti Vlas, Slanchev Bryag and Ahtopol accumulated significantly higher metal elements in their tissues. Only few significant seasonal differences in the concentration of metal elements in wedge clams were present and the observed seasonal variations were probably connected to the hydrological parameters of the ecosystems. The wedge clam D. trunculus is a suitable bioindicator for assessment and monitoring of metal pollution in the Bulgarian Black Sea environment.

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Section: Discussionmentioning

confidence: 99%

Trace metal accumulation in tissues of wedge clams from sandy habitats of the Bulgarian Black Sea coast

Bachvarova¹,

Stancheva²,

Ignatova-Ivanova³

et al. 2022

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“…Under the conditions of the modern development of production, with a constant decrease in resources, there is a need for optimization of differences in technological process requirements and supporting resources environmental security. On the way to the sustainable development of production and technological processes, it is necessary to find innovative ways to improve the environmental performance of production processes and products (Ishchenko et al, 2017;Kardasz et al, 2018;Pohrebennyk et al, 2016;Mitryasova et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Eco-Friendly Principles on the Extraction of Humic Acids Intensification from Biosubstrates

Malyushevskaya¹,

Koszelnik²,

Yushchishina³

et al. 2023

J. Ecol. Eng.

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It is necessary to find innovative ways to improve the environmental performance of production processes and products. The technology of extracting valuable components from raw materials of plant origin is often used in technological processes of the food, pharmaceutical, chemical and other industries. Extraction is the most energy intensive step. The factors contributing to the extraction of humic acids from plant substrates under the action of electric discharge were studied. The purpose of the work was to study the efficiency of humic acids extraction from the biosubstrate under the action of electric discharges. The physical experiment showed that the main factor influencing the intensity of extraction is the degree of grinding of the solid phase of the biosubstrate-water suspension. The efficiency of electric discharge grinding depends on the pressure amplitude at the distance of the inner radius of the chamber and the number of discharge pulses. It was established that the number of chemical reagents (alkalis), usually used in the process of extracting humic acids from peat, can be reduced many times due to the appearance of radicals and peroxide compounds in the peat-water suspension resulting from the action of an electric discharge. The prospects of the non-thermal electric discharge method of intensification of the extraction of humic acids from biosubstrates were determined.

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“…The search for the methods to intensify the release of natural substances of different structural organization for comprehensive practical application on the principles of green chemistry, along with finding new and improving the already known methods of synthesis is an urgent task of both applied and fundamental sciences. At the base of modern green technologies, which are aimed at achieving zero waste, reducing energy costs, are the principles of sustainable development (Ishchenko and et al, 2019;Mariychuk et al, 2020a;Mitryasova et al, , 2020Bezsonov et al 2017;Pohrebennyk et al, 2016). Evaluation of the environmental impact of a chemical process requires the consideration of numerous factors, such as processing efficiency, safety, and cost effectiveness (Eissen, 2012;Hutchison, 2019;Petrov et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Green Approach to Intensify the Extraction Processes of Substances from Plant Materials

Malyushevskaya¹,

Koszelnik²,

Yushchishina³

et al. 2022

J. Ecol. Eng.

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The principles of sustainable development and green chemistry are priorities in the development of new technologies for the extraction of useful biologically active substances, for example, in the manufacture of medicines. The processes of extracting substances from plant raw materials have many applications. Intensification of such processes, reducing their duration, energy consumption and consumption of the extractant is urgent. The object of the reseach is the green approach to intensify the extraction processes of polysaccharide substances from plant materials. The research methodology was experimental with statistical data processing. In the field of experimental research was the process of the influence of pulsed, alternating and direct current on the intensity of aqueous extraction of polysaccharides from plant materials. The high efficiency of intensification of extraction by a pulsed electric field was studied. The process can reduce the time for obtaining water-soluble polysaccharides by 3 times in comparison with traditional pharmacopoeial convection methods and reduce energy consumption by 20 times. The significance of the pulse current parameters for effective extraction was determined: the referred pulse shape, the frequency of the pulse current for extracting the maximum amount of water-soluble polysaccharides, the pulse duration, and the optimal processing time. The green approach to the use of a moderate electric field of pulsed current to accelerate the extraction of biologically active substances is the basis of the method of intensification of other traditional mass transfer processes for the sustainable development of technology.

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Features of Heavy Metals Accumulation in Bottom Sediments of the Southern Bug Hydroecosystem

Cited by 10 publications

References 7 publications

Trace metal accumulation in tissues of wedge clams from sandy habitats of the Bulgarian Black Sea coast

Trace metal accumulation in tissues of wedge clams from sandy habitats of the Bulgarian Black Sea coast

Eco-Friendly Principles on the Extraction of Humic Acids Intensification from Biosubstrates

Green Approach to Intensify the Extraction Processes of Substances from Plant Materials

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Features of Heavy Metals Accumulation in Bottom Sediments of the Southern Bug Hydroecosystem

Cited by 10 publications

References 7 publications

﻿Trace metal accumulation in tissues of wedge clams from sandy habitats of the Bulgarian Black Sea coast

﻿Trace metal accumulation in tissues of wedge clams from sandy habitats of the Bulgarian Black Sea coast

Eco-Friendly Principles on the Extraction of Humic Acids Intensification from Biosubstrates

Green Approach to Intensify the Extraction Processes of Substances from Plant Materials

Contact Info

Product

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Trace metal accumulation in tissues of wedge clams from sandy habitats of the Bulgarian Black Sea coast

Trace metal accumulation in tissues of wedge clams from sandy habitats of the Bulgarian Black Sea coast