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All Journal Journal of Degraded and Mining Lands Management Civil Engineering Journal
Tabunshchik, Vladimir
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Civil Engineering, Building, Construction & Architecture

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Content of heavy metals in soils of Bidoup Nui Ba National Park (Southern Vietnam) Pham, Cam Nhung; Lebedev , Yaroslav; Drygval, Anna; Gorbunov , Roman; Gorbunova, Tatiana; Kuznetsov, Andrey; Kuznetsova, Svetlana; Nguyen, Dang Hoi; Tabunshchik, Vladimir
Journal of Degraded and Mining Lands Management Vol. 11 No. 4 (2024)
Publisher : Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15243/jdmlm.2024.114.6413

Abstract

The study of technogenic pollution of soils with heavy metals (HM) is an essential task for ecology. The analysis of the content of HMs in the park's soils shows the degree of pollution and the sources of its occurrence. The study of the elemental composition of soils is an objective method for assessing the state of the ecosystem. To determine the current state of heavy metal contamination in forest soils, the concentrations of their total forms were analyzed. Heavy metals, including Zn, Pb, Cr, Cu, Hg, Cd, and As, were found in the study area. In addition, the threat of contamination with Cd and As has been identified. The calculation of the total pollution coefficient allows us to assess the level of pollution for the dry season (Zc = 18.45-28.24, average 22.45) as average (moderately hazardous) and for the wet season (Zc = 0.01-5.11, average 1.96) as permissible. This indicates an unfavorable environmental situation. The content of heavy metals in soils depends on the season. Observations show that at the end of the wet season, the concentration of heavy metals decreases, while it increases in the period after the dry season. 
Assessment of soil pollution in coastal landscapes of the Republic of Djibouti and ecological risks Nikiforova, Aleksandra; Pham, Cam Nhung; Chernyi, Georgii; Tabunshchik, Vladimir; Daher, Abdourahman; Cheik, Sougueh; Gorbunov , Roman; Gorbunova, Tatiana; Repetskaya, Anna
Journal of Degraded and Mining Lands Management Vol. 12 No. 1 (2024)
Publisher : Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15243/jdmlm.2024.121.6579

Abstract

Tropical ecosystems play an important role in the environment. Coastal areas are subjected to a wide range of impacts and pollution, which have drawn worldwide attention over the past few decades. Comprehensive studies of heavy metal content in soils worldwide are extremely important for assessing and predicting ecological risks. Very few studies have been devoted to a complete study of the physicochemical characteristics of soils, assessment of heavy metal accumulation in coastal zones along the Djibouti coast, and potential ecological risks. The study investigated the physico-chemical characteristics of soil, assessed the accumulation of heavy metals in coastal zones along the Djibouti coast, and analyzed the potential environmental risks associated with the presence of heavy metals in the studied soils. Analysis of heavy metals and trace elements in the soils of the coastal areas of Djibouti revealed that the levels of these elements are lower than in soils of the Red Sea coast and are in line with WHO and other international standards. All heavy metals in the soil of the studied area demonstrate low levels of potential ecological risk. The soils of the studied areas, overall, have not undergone significant heavy metal pollution and can be considered suitable for various types of use.
Assessment of groundwater contamination risk and seasonal dynamics of microelement composition in groundwater: A case study from the Karadag State Nature Reserve, Crimean Peninsula Pham, Cam Nhung; Lapchenko, Vladimir; Lapchenko, Elena; Tabunshchik, Vladimir
Journal of Degraded and Mining Lands Management Vol. 12 No. 3 (2025)
Publisher : Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15243/jdmlm.2025.123.7443

Abstract

The chemical composition of the water was determined to obtain a general picture of the geographical distribution of elements and identify the peculiarities of the elemental and chemical composition of groundwater. The analysis of heavy metal concentrations in the four wells, situated within the territory of the Karadag Reserve, revealed seasonal variations. An increase in macroelement concentrations was observed during winter, while their levels decreased during summer. The concentrations of microelements such as B (boron) and Fe (iron) decreased with increasing distance from the sea during winter and increased during summer. The analysis also identified significant exceedances of the maximum permissible concentrations (MPC) for heavy metals Li, B, Mg, Ca, Fe, Ni, and Br, as well as occasional exceedances of sodium and manganese concentrations. For all elements, the contamination factor (CF) was calculated. Based on the CF values, the pollution load index (PLI) was calculated to assess the degree of pollution by the studied elements. The results indicate the absence of pollution in the investigated area, both in summer and winter periods. To determine the degree of anthropogenic pollution by elements, the geoaccumulation index (Igeo) was calculated. Most of the studied elements do not indicate pollution either in summer or winter. However, the Igeo values for calcium indicate a moderate level of pollution during summer and a higher level during winter. The overall analysis of the results suggests that there is no serious groundwater pollution issue in the studied area by the analyzed elements.
Assessment of Organic Carbon Stocks at Landscape Levels Using the InVEST Software Drygval, Polina; Drygval, Anna; Tabunshchik, Vladimir
Civil Engineering Journal Vol 11, No 3 (2025): March
Publisher : Salehan Institute of Higher Education

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28991/CEJ-2025-011-03-018

Abstract

This study aims to calculate and assess organic carbon levels at various landscape levels of the Crimean Peninsula using the Carbon Storage and Sequestration model of the InVEST software. It outlines the stages of working with this model and highlights limitations such as the quality of input data, temporal coverage, and spatial resolution, which can significantly influence the results. Assessment of organic carbon stocks in soils, aboveground and belowground biomass, and vegetation types revealed that the highest carbon concentration was in the low-altitude landscape level of the southern macroslope. From 2017 to 2023, an annual decrease in organic carbon stocks of 0.062 t/ha was recorded, which is likely linked to climate change and shifts in land use. This research provides the first calculations of organic carbon content within the landscape levels of the Crimean Peninsula. As carbon is a significant greenhouse gas, its accumulation or emissions directly affect climate change. Evaluating organic carbon stocks in ecosystems enhances our understanding of their role in mitigating climate change and informing carbon dioxide (CO2) reduction strategies. These findings highlight the need to consider vegetation types and their changes when calculating organic carbon in landscapes and supporting regional environmental policy development. Doi: 10.28991/CEJ-2025-011-03-018 Full Text: PDF
Assessing the impact of anthropogenic and natural factors on soil-related ecosystem services: a case study of the coastal landscape of Djibouti Nikiforova, Aleksandra; Tabunshchik, Vladimir; Pham, Cam Nhung; Chernyi, Georgii; Lineva, Nastasia; Gorbunov , Roman; Gorbunova, Tatiana; Repetskaya, Anna
Journal of Degraded and Mining Lands Management Vol. 12 No. 4 (2025)
Publisher : Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15243/jdmlm.2025.124.8335

Abstract

Coastal regions are highly sought after for human habitation, exhibiting a population density that is threefold greater than the global mean. These zones are pivotal for environmental resources, human prosperity, and economic activities, providing a suite of services. The concept of ecosystem services has garnered international focus for its contribution to sustainable development. These services represent the myriad benefits that ecosystems confer, meeting socio-economic demands and enhancing human welfare. This analysis endeavors to appraise the value of ecosystem services in coastal areas, with a particular emphasis on the physicochemical properties of soils along Djibouti's coastline. It incorporates an assessment of local characteristics, climatic conditions, and the anthropogenic influence on the environment. Despite facing considerable threats to its biodiversity, Djibouti's coastline offers a plethora of vital ecosystem services to its inhabitants. Among the regulatory services rendered by these locales are air quality management, erosion mitigation, soil and sediment retention, climate and microclimate stabilization, carbon storage and sequestration, nutrient recycling, and facilitation of pollination.
Co-Authors Cheik, Sougueh Chernyi, Georgii Daher, Abdourahman Drygval, Anna Drygval, Polina Gorbunov , Roman Gorbunova, Tatiana Kuznetsov, Andrey Kuznetsova, Svetlana Lapchenko, Elena Lapchenko, Vladimir Lebedev , Yaroslav Lineva, Nastasia Nguyen, Dang Hoi Nikiforova, Aleksandra Pham, Cam Nhung Repetskaya, Anna