Metals in sediments: bioavailability and toxicity in a tropical reservoir used for public water supply

Página do item simplificado
dc.contributor.authorCardoso-Silva, Sheila [UNESP]
dc.contributor.authorDa Silva, Daniel Clemente Vieira Rego
dc.contributor.authorLage, Fernanda
dc.contributor.authorde Paiva, Teresa Cristina Brazil
dc.contributor.authorMoschini-Carlos, Viviane [UNESP]
dc.contributor.authorRosa, André Henrique [UNESP]
dc.contributor.authorPompêo, Marcelo
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.date.accessioned2018-12-11T17:02:37Z
dc.date.available2018-12-11T17:02:37Z
dc.date.issued2016-05-01
dc.description.abstractSediments may be a repository of contaminants in freshwater ecosystems. One way to assess the quality of this compartment, in terms of potentially bioavailable metals, is by the analysis of acid-volatile sulfide (AVS) and simultaneously extracted metals (SEM). In order to investigate the bioavailability, toxicity, and compartmentalization of different metals (Cd, Cr, Cu, Ni, Pb, Zn), sampling of surface sediments was performed at nine stations along the Paiva Castro reservoir (São Paulo, Brazil). The metals were analyzed using atomic absorption spectroscopy. Sediment organic matter (OM), organic carbon (OC), and grain size were also measured. The parameters pH, EH, temperature, and dissolved oxygen were determined at the sediment-water interface. Chronic and acute toxicological tests were performed with sediments from the area where water was extracted for the public water supply. Low levels of OM, associated with loss of stratification in the water column, explained the relatively low AVS values. The molar ratio ∑[SEM]−[AVS]/fOC was less than 130 mmol/kg−1 for all the sampling stations, indicating that the metals were not bioavailable. With the exception of Cd, metal levels were in accordance with background concentrations and the threshold effect level (TEL) established by the Canadian Council of Ministers of the Environment. The ecotoxicological tests confirmed the absence of toxic effects to biota. Application of principal component analysis indicated the presence of four compartments along the reservoir: (1) a riverine zone, potentially threatened by contamination with Cd; (2) an intermediate zone; (3) a limnic area; and (4) the area where water was taken for the public water supply.en
dc.description.affiliationEnvironmental Sciences Program UNESP, Sorocaba campus
dc.description.affiliationEcology Department Institute of Biosciences University of São Paulo
dc.description.affiliationUniversity of São Paulo
dc.description.affiliationUnespEnvironmental Sciences Program UNESP, Sorocaba campus
dc.identifierhttp://dx.doi.org/10.1007/s10661-016-5276-5
dc.identifier.citationEnvironmental Monitoring and Assessment, v. 188, n. 5, 2016.
dc.identifier.doi10.1007/s10661-016-5276-5
dc.identifier.file2-s2.0-84964770354.pdf
dc.identifier.issn1573-2959
dc.identifier.issn0167-6369
dc.identifier.scopus2-s2.0-84964770354
dc.identifier.urihttp://hdl.handle.net/11449/172895
dc.language.isoeng
dc.relation.ispartofEnvironmental Monitoring and Assessment
dc.relation.ispartofsjr0,589
dc.relation.ispartofsjr0,589
dc.rights.accessRightsAcesso aberto
dc.sourceScopus
dc.subjectContamination
dc.subjectMetal
dc.subjectSediment
dc.subjectSpatial heterogeneity
dc.subjectToxicity
dc.titleMetals in sediments: bioavailability and toxicity in a tropical reservoir used for public water supplyen
dc.typeArtigo
unesp.author.lattes5228846314663888[6]
unesp.author.orcid0000-0002-2042-018X[6]

Arquivos

Pacote Original
Agora exibindo 1 - 1 de 1
Imagem de Miniatura
Nome:
2-s2.0-84964770354.pdf
Tamanho:
1.03 MB
Formato:
Adobe Portable Document Format
Descrição:
Baixar

Coleções

Artigos - Engenharia Ambiental - Sorocaba