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Environmental Risk of Metal Contamination in Sediments of Tropical Reservoirs
Stockholm University, Faculty of Science, Department of Environmental Science and Analytical Chemistry. Universidade Federal de Juiz de Fora, Brazil.ORCID iD: 0000-0001-6547-4934
Stockholm University, Faculty of Science, Department of Environmental Science and Analytical Chemistry.ORCID iD: 0000-0002-1549-7449
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Number of Authors: 122019 (English)In: Bulletin of Environmental Contamination and Toxicology, ISSN 0007-4861, E-ISSN 1432-0800, Vol. 103, no 2, p. 292-301Article in journal (Refereed) Published
Abstract [en]

Reservoir sediment can work as both sink and source for contaminants. Once released into the water column, contaminants can be toxic to biota and humans. We investigate potential ecological risk to benthic organisms by metals contamination in six reservoirs in Southeast Brazil. Results of the bioavailable fraction of copper (Cu), chromium (Cr), cadmium (Cd), lead (Pb), zinc (Zn), and iron (Fe) in sediment samples are presented. Considering Cu, Cd, and Zn concentrations, about 6% of the samples exceeded the threshold effect levels of sediment quality guidelines. The comparison to sediment quality guidelines is conservative because we used a moderate metal extraction. Control of contaminant sources in these reservoirs is key because they are sources of water and food. The mixture toxicity assessment showed an increased incidence of toxicity to aquatic organisms showing that mixture toxicity should be taken into account in sediment assessment criteria.

Place, publisher, year, edition, pages
2019. Vol. 103, no 2, p. 292-301
Keywords [en]
Guidelines, Mixture toxicity, Potential ecological risk, Reservoir sediments, Trace elements
National Category
Earth and Related Environmental Sciences
Identifiers
URN: urn:nbn:se:su:diva-171700DOI: 10.1007/s00128-019-02668-0ISI: 000476598000013PubMedID: 31243473OAI: oai:DiVA.org:su-171700DiVA, id: diva2:1343771
Available from: 2019-08-19 Created: 2019-08-19 Last updated: 2019-12-04Bibliographically approved

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Quadra, Gabrielle R.Sobek, Anna
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