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All Journal Journal of Degraded and Mining Lands Management
Nguyen, Dang Hoi
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology

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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. 
Features of seasonal biogeochemical element migration in the "soil-plant" system: A case study of Bambusoideae in the Bidoup-Nui Ba National Park (Central Vietnam) Pham, Cam Nhung; Lebedev, Yaroslav; Drygval , Anna; Gorbunov, Roman; Gorbunova, Tatiana; Kuznetsov, Andrei; Kuznetsova, Svetlana; Nguyen, Dang Hoi
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.2024.121.6865

Abstract

The article presents unique research conducted in Bidoup-Nui Ba National Park, Vietnam, focusing on the biogeochemical element migration in soil and plants. The study aimed to identify element content changes, biological accumulation, and biogeochemical mobility during wet and dry seasons across different landscape conditions. The research revealed the active elements involved in migration and accumulation, assessed mobility and accumulation in bamboo organs, and highlighted the peculiarities within the "soil-plant" system. The study found that the uptake of certain microelements by plants is influenced by landscape facies and moisture conditions. For example, Zn, Cu, and Co were introduced through plant litter during the wet season and accumulated, while Mo accumulation was more pronounced in the dry season. Furthermore, the research observed variations in biological uptake by bamboo organs, with different landscape conditions and seasons playing a role. The biogeochemical mobility of elements in bamboo organs increased significantly with soil moisture during the wet season. Overall, the research provided insights into element accumulation and biogeochemical migration. Notably, the accumulation of element B was found to increase with soil moisture, while its reduction was associated with slope process activation during the wet season.
Concentrations of labile heavy metal forms in soils of Bidoup Nui Ba National Park, Southern Vietnam Pham, Cam Nhung; Lebedev, Yaroslav O.; Drygval, Anna V.; Gorbunov, Roman V.; Gorbunova, Tatyana Yu.; Kuznetsov, Andrey N.; Kuznetsova, Svetlana P.; Nguyen, Dang Hoi; Tabunshchik, Vladimir A.; Ngo, Trung Dung
Journal of Degraded and Mining Lands Management Vol. 13 No. 4 (2026)
Publisher : Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15243/jdmlm.2026.134.11121

Abstract

An assessment of the content of mobile (labile) forms of heavy metals (HMs) – As, Hg, Cr, Zn, Cd, Pb, Cu – in the soils of Bidoup-Nui Ba National Park (Lam Dong Province, Vietnam) was conducted. The study was carried out on a key site representing a catena in a tropical forest with a predominance of yellow ferrallitic soils. Samples were collected in the dry and wet seasons from various genetic horizons. All analyzed elements were detected in all samples. A clear seasonal pattern emerged from our data: concentrations of labile heavy metal forms were consistently elevated during the dry period compared to the wet season, with differences reaching up to 10-fold for certain elements. Exceedances of Russian MPC standards for mobile forms were noted for lead (Pb) in four samples (up to 13.1 mg/kg) and for zinc (Zn) in three samples (up to 100.97 mg/kg) in the dry season. Calculated hazard coefficients (K?) showed that in the dry season, the potential environmental hazard associated with mobile forms of Pb and Zn is higher (average K? = 0.76 and 0.98, respectively) than in the wet season (average K? = 0.29 and 0.16). High positive correlations were found between the contents of all studied HMs in mobile form (r = 0.83-0.97), indicating their coupled migration and possibly common sources of input or accumulation conditions. The obtained data characterize for the first time the ecological and geochemical state of the soils of this protected natural area in terms of the content of bioavailable forms of HMs. The results indicate the need for monitoring mobile forms of HMs even in background territories, as their accumulation, especially in the dry season, can create potential environmental risks due to inclusion in trophic chains.
Co-Authors Drygval , Anna Drygval, Anna Drygval, Anna V. Gorbunov , Roman Gorbunov, Roman Gorbunov, Roman V. Gorbunova, Tatiana Gorbunova, Tatyana Yu. Kuznetsov, Andrei Kuznetsov, Andrey Kuznetsov, Andrey N. Kuznetsova, Svetlana Kuznetsova, Svetlana P. Lebedev , Yaroslav Lebedev, Yaroslav Lebedev, Yaroslav O. Ngo, Trung Dung Pham, Cam Nhung Tabunshchik, Vladimir Tabunshchik, Vladimir A.