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- Title
Ecological risk assessment and spatial distribution of heavy metals in surface sediments. A case study of two small storage reservoirs, SE Poland.
- Authors
Bąk, Łukasz; Górski, Jarosław; Sałata, Aleksandra; Gawdzik, Jarosław; Muszyńska, Joanna; Górska, Katarzyna
- Abstract
The article shows the results of research on heavy metals (Cr, Zn, Ni, Cu, Pb, Cd) content in bottom sediments of two small storage reservoirs located in the south-eastern part of Poland. The analyses covered the top 10 cm layer of sediment samples taken in transects perpendicular to the shoreline, located in upper, central and lower sections of the studied reservoirs. The ordinary kriging method was applied to interpolate spatial distribution of heavy metals content in the sediments. The assessment of surface sediment contamination with heavy metals was based on a threshold effect level and probable effect level methods. In addition, the ecological risk was assessed on the basis of the indices: potential ecological risk index and toxic risk index. Moreover, the principal component analysis was carried out to find determinants for the distribution of the analyzed trace elements in reservoirs. The results of the completed analysis have proven that the highest concentrations of heavy metals (HM) are found in the vicinity of dams in both reservoirs. Calculated probable effects level values indicate a negative impact of Pb– Bliżyn Reservoir (BR) and Cd– Małoszówka Reservoir (MR) on aquatic biota. The analysis of heavy metal content and their interrelationships in surface sediments proves that Pb, Cu and Zn in the BR and Cd and Cr in the MR have anthropogenic origins. Moreover, the main determinants for HM distribution in the reservoir are hydromorphological parameters, which determine sediment grading and organic matter transport.
- Subjects
POLAND; HEAVY metals; ECOLOGICAL risk assessment; METALLIC surfaces; RESERVOIRS; ANALYSIS of heavy metals; SEDIMENTS
- Publication
Desalination & Water Treatment, 2020, Vol 186, p206
- ISSN
1944-3994
- Publication type
Article
- DOI
10.5004/dwt.2020.25240