SONIA MARIA BARROS DE OLIVEIRA
15 resultados
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Resumo IPEN-doc 04701 Evaluation of mercury levels in bottom sediments from Serra do Navio using a radiochemical procedure1997 - GONCALVES, C.; FAVARO, D.I.T.; VASCONCELLOS, M.B.A.; OLIVEIRA, S.M.B.; FOSTIER, A.H.; GUIMARAES, J.R.D.Resumo IPEN-doc 04093 A preliminary study on mercury distribution in soil profiles from Serra do Navio using radiochemical neutron activation analysis1997 - GONCALVES, C.; FAVARO, D.I.T.; OLIVEIRA, S.M.B.; BOULET, R.I.; SAIKI, M.Resumo IPEN-doc 06519 Mercury accumulation in natural forested amazonian soils1999 - FOSTIER, A.H.; OLIVEIRA, S.M.B.; GUIMARAES, J.R.D.; FORTI, M.C.; MELFI, A.J.; BOULET, R.I.; FAVARO, D.I.T.; KRUG, F.J.Resumo IPEN-doc 06518 Evaluation of mercury levels in sediment and soil samples from Vila Nova River Basin, in Amapa State, using neutron activation analysis1999 - GONCALVES, C.; FAVARO, D.I.T.; MELFI, A.J.; OLIVEIRA, S.M.B.; VASCONCELLOS, M.B.A.; FOSTIER, A.H.; GUIMARAES, J.R.D.; BOULET, R.I.Artigo IPEN-doc 05919 Aplicacao do metodo de analise por ativacao com neutrons a determinacao de mercurio total e outros elementos de interesse em amostras de sedimentos da regiao da Serra do Navio no estado do Amapa1995 - FAVARO, D.I.T.; GONCALVES, C.; VASCONCELLOS, M.B.A.; OLIVEIRA, S.M.B.Artigo IPEN-doc 06730 O papel dos solos amozonicos como reservatorios de mercurio1999 - OLIVEIRA, S.M.B.; MELFI, A.J.; FOSTIER, A.H.; FORTI, M.C.; FAVARO, D.I.T.; BOULET, R.I.Artigo IPEN-doc 06561 Determinacao multielementar em amostras de sedimentos da regiao do Tartarugalzinho, Amapa, por ativacao neutronica1999 - NERI, M.C.; FAVARO, D.I.T.; OLIVEIRA, S.M.B.; VASCONCELLOS, M.B.A.; FOSTIER, A.H.; GUIMARAES, J.R.D.; MELFI, A.J.; FORTI, M.C.Artigo IPEN-doc 06293 Distribuicao de mercurio em solos superficiais da Serra do Navio, Amapa, Brasil1997 - GONCALVES, C.; FAVARO, D.I.T.; OLIVEIRA, S.M.B.Artigo IPEN-doc 03883 Determination of total mercury in sediment samples from Serra do Navio, Amapa, Brazil, by radiochemical neutron activation analysis1996 - GONCALVES, C.; FAVARO, D.I.T.; VASCONCELLOS, M.B.A.; OLIVEIRA, S.M.B.; FOSTIER, A.H.; GUIMARAES, J.R.Artigo IPEN-doc 19566 Major and trace element assessment of Tietê river sediments, São Paulo, Brazil2014 - FAVARO, D.I.T.; ALEGRE, G.F.; BORRELY, S.I.; VUKAN, W.; VIEIRA, A.S.; OLIVEIRA, S.M.B.The objective of this study was to quantify major and trace elements present in sediments collected from the one of Brazil’s most important rivers, Tieteˆ River. Sediments from 5 different sampling points (P0–P4), in 3 campaigns (2008/2009), from the headwaters to Suzano County upstream from Sa˜o Paulo city were collected. X-ray fluorescence was applied for measuring total concentration of major elements and instrumental neutron activation analysis (INAA) for trace elements. The elements Cd, Hg and Pb were determined by atomic absorption spectrometry after digestion using the US EPA 3,051 procedure. These metal concentrations were compared to the PEL and TEL oriented values from CCME. The sampling sites P3 and P4, near industrialized areas, showed the highest concentrations for potentially bioavailable metals, mainly Pb and Hg. The results obtained by INAA were compared to upper continental crust values. A strong enrichment was found for the elements As, Br, Sb, Th, U and Zn. These results evidenced contamination by industrial effluents and sewage even relatively close to the Tiete River headwaters. The worst biological effects (acute toxicity) on benthonic organism Hyalella azteca were also observed at P3 and P4.