avaliação da qualidade de sedimentos - estudo de caso: sub-bacia do ribeirão espírito santo, afluente do rio são francisco evaluation of sediment quality - case study: sub-watershed of espírito santo stream, affluent of the são francisco river
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avaliação da qualidade de sedimentos - estudo de caso: sub-bacia do ribeirão espírito santo, afluente do rio são francisco evaluation of sediment quality - case study: sub-watershed of espírito santo stream, affluent of the são francisco river

;Vanessa Kelly Saraiva;Marcos Roberto Lopes do Nascimento;Helena Eugênia Leonhardt Palmieri;Vanusa Maria Feliciano Jacomino
greece and rome 2009 Vol. 32 pp. 1995-2002
194
saraiva2009qumicaavaliao

Abstract

This study evaluated the environmental impact resulting from surface water and sediment contamination by metals in a watershed affected by a tailing basin that controls effluents coming from a zinc-ore beneficiation plant. The studies combined assessments of sediment chemistry (exceedances of sediment quality guidelines), benthic assemblage structure and acute and chronic ecotoxicity. The results showed that the levels of metal contamination in sediments are not yet enough to cause deleterious effects to the biota. However, the ecotoxicity tests indicated the occurrence of chronic effects, demonstrating that other factors, as the use of fertilizers, could also be a source of contamination.

Keywords

sediments

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DOI:
10.1590/S0100-40422009000800003
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