Trace metals accumulation in the eco-system water – soil – vegetation (Agropyron cristatum) – common voles (Microtus arvalis) – parasites (Hymenolepis diminuta) in Radnevo region, Bulgaria
| Autor: | Antonina Kovacheva, Radost Ilieva, Stefka Tepavitcharova, Veselin Nanev, M. Gabrashanska, Rumiana Gergulova, Ivelin Vladov, Diana Rabadjieva, Sotirios Karavoltsos |
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| Rok vydání: | 2021 |
| Předmět: |
Soil pollution
010501 environmental sciences 01 natural sciences Biochemistry Inorganic Chemistry Soil 03 medical and health sciences 0302 clinical medicine Trace metals Animals Organic matter Trace metal Accumulation in common voles Agropyron Bulgaria Microtus Water pollution 0105 earth and related environmental sciences chemistry.chemical_classification biology Arvicolinae Hymenolepis diminuta biology.organism_classification Soil contamination Trace Elements Agropyron cristatum chemistry Bioaccumulation Environmental chemistry Soil water Chemical species Molecular Medicine Environmental Pollution Accumulation in vegetation 030217 neurology & neurosurgery Environmental Monitoring |
| Zdroj: | Journal of Trace Elements in Medicine and Biology. 66:126750 |
| ISSN: | 0946-672X |
| Popis: | Background Coal and coal processing industries provoke trace metal pollution, which has a negative effect on the water – soil – vegetation – small mammals eco-system, constituting part of the food chain and exerting a serious impact on human health. Objectives Assessment of the environmental impact of Maritza iztok coal complex, situated east of Radnevo town, Bulgaria, by tracking the dynamics and accumulation of trace metals in the eco-system water – soil – vegetation – common voles – parasites. Methods Samples from surface waters, their nearby uncultivated soils, meadow uncultivated vegetation (Agropyron cristatum) and field common voles (Microtus arvalis) were collected. In situ measurements and laboratory extraction procedures and analyses were performed. Accumulation and mobility indices were calculated. The distribution of dissolved Mn, Ni, Cu, Zn and Pb chemical species in water-soil extracts was calculated using a thermodynamic approach. Two thermodynamic models were applied – the classical ion-association model for calculating the inorganic trace metal species and the Stockholm Humic Model (SHM) accounting for the complexation reactions of trace metals with organic matter. Visual Minteq computer program, Version 3.1 was used. The relationship chemical species - bioaccumulation was discussed. Results Pb and Mn, together with SO42− and PO43- were found to be the main pollutants of waters in the region. The soils studied exhibited low concentrations of trace metals, not exceeding the specified MACs. The content of Mn was the highest, followed by Zn, Pb, Cu and Ni. The highest phytoaccumulation coefficients in the studied uncultivated grass vegetation were calculated for Cu and Zn, being 1–2 orders of magnitude higher than those of Mn and Ni. The accumulation of trace metals was explained on the basis of ions mobility and chemical species distribution. In the case of the host-parasite system Microtus alvaris - Hymenolepis diminuta, Zn displays the highest accumulation coefficient, followed by those of Cu and Pb. The parasite showed a higher bioaccumulation compared to infected common voles, with the highest bioaccumulation found for Ni. Conclusions The bioaccumulation of trace metals depends on their mobility, concentration and chemical forms in water-soil solutions. Metal-organic species stimulate the phytoaccumulation of trace metals while inorganic ones suppress it. The sequence of trace metals bioaccumulation in common voles is analogous to that of soil contamination. The parasite exhibited higher bioaccumulation levels compared to infected common voles. |
| Databáze: | OpenAIRE |
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