Voltar
Artigo Acesso aberto Produção Nacional Revisado por pares
BIBTEX RIS

Extração seletiva de metais pesados em sedimentos de fundo do Rio Tietê, São Paulo

2009; Brazilian Chemical Society; Volume: 32; Issue: 1 Linguagem: Inglês

10.1590/s0100-40422009000100005

ISSN

1678-7064

Autores

José Eduardo Bevilacqua, Ivone Silveira da Silva, Jaim Lichtig, Jorge C. Masini,

Tópico(s)

Geochemistry and Geologic Mapping

Resumo

SÃO PAULO.Sediment samples from Tietê river were submitted to chemical and sequential extractions of heavy metals (Cd, Cr, Cu, Ni, Pb and Zn).It was followed a single extraction by using 0.1 mol L -1 hydrochloric acid and a sequential procedure to evaluate possible chemical associations described as exchangeable, carbonate, reducible oxides, sulfide, organic matter and residual fractions.High concentrations of heavy metals were determined at Pirapora reservoir, which is closer to the Metropolitan Area of São Paulo while for Barra Bonita reservoir, the results showed low concentrations for such elements.Acid volatile sulfides, grain size distribution and carbon contents were also determined.

Referência(s)