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Environmental Risk of Metal Contamination in Sediments of Tropical Reservoirs
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- Quadra, Gabrielle R. (author)
- Stockholms universitet,Institutionen för miljövetenskap och analytisk kemi,Universidade Federal de Juiz de Fora, Brazil
- Lino, Adan (author)
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- Sobek, Anna (author)
- Stockholms universitet,Institutionen för miljövetenskap och analytisk kemi
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- Malm, Olaf (author)
- Barros, Nathan (author)
- Guida, Yago (author)
- Thomaz, Jose (author)
- Mendonca, Raquel (author)
- Cardoso, Simone (author)
- Estrada, Carlos (author)
- Rust, Felipe (author)
- Roland, Fabio (author)
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- (creator_code:org_t)
- 2019-06-26
- 2019
- English.
- In: Bulletin of Environmental Contamination and Toxicology. - : Springer Science and Business Media LLC. - 0007-4861 .- 1432-0800. ; 103:2, s. 292-301
- Journal article (peer-reviewed)
Abstract
Subject headings
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- 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.
Subject headings
- NATURVETENSKAP -- Geovetenskap och miljövetenskap (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences (hsv//eng)
Keyword
- Guidelines
- Mixture toxicity
- Potential ecological risk
- Reservoir sediments
- Trace elements
Publication and Content Type
- ref (subject category)
- art (subject category)
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- Lino, Adan
- Sobek, Anna
- Malm, Olaf
- Barros, Nathan
- Guida, Yago
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- Thomaz, Jose
- Mendonca, Raquel
- Cardoso, Simone
- Estrada, Carlos
- Rust, Felipe
- Roland, Fabio
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