Potentially toxic elements in surface soils of the Lower Don floodplain and the Taganrog Bay coast: sources, spatial distribution and pollution assessment
| Autor: | Saglara Mandzhieva, Inna Zamulina, Tatiana Bauer, Elizaveta Konstantinova, Tatiana Minkina, Marina Voloshina, Dina Nevidomskaya, Ilia Lobzenko, Aleksey Yu Maksimov, Svetlana Sushkova |
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| Rok vydání: | 2021 |
| Předmět: |
Pollution
geography Environmental Engineering geography.geographical_feature_category 010504 meteorology & atmospheric sciences Floodplain Aquatic ecosystem media_common.quotation_subject General Medicine 010501 environmental sciences Structural basin Spatial distribution 01 natural sciences Floodplain soils Geochemistry and Petrology Environmental chemistry Soil water Environmental Chemistry Environmental science Bay 0105 earth and related environmental sciences General Environmental Science Water Science and Technology media_common |
| Zdroj: | Environmental geochemistry and health. |
| ISSN: | 1573-2983 |
| Popis: | The pollution of floodplain, deltaic and adjacent coastal soils in large fluvial systems, considered an urgent environmental problem, as well as potentially toxic elements in such environments, can negatively affect aquatic ecosystems, as well as pose significant risks to human health. This paper is devoted to the geochemistry of potentially toxic elements in soils of the Lower Don basin, which is one of the largest and most anthropogenically transformed water bodies in Southern Russia, as well as the adjacent areas of the Taganrog Bay coast. The median element concentrations in the soils of the study area were consistent with the world soil average and the contents of elements in background soils. Comparative assessment of the spatial distributions as well as the results of Pearson’s correlations, cluster analysis and principal component analysis showed that Cr, Ni, Cu and Zn are predominantly of natural origin; Mn and As are of mixed sources; and Cd and Pb are predominantly of anthropogenic origin. The geochemical anomalies of elements were associated with the impact of local anthropogenic sources. Geochemical background values for Cr, Mn, Ni, Cu, Zn, As, Cd and Pb in the soils of the Lower Don and the Taganrog Bay coast determined using the ‘median + 2 median absolute deviations’ approach are presented. The highest values of the integrated pollution indices were observed in floodplain soils of small rivers. |
| Databáze: | OpenAIRE |
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