2009
DOI: 10.1590/s0100-40422009000200018
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O papel dos sulfetos volatilizados por acidificação no controle do potencial de biodisponibilidade de metais em sedimentos contaminados de um estuário tropical, no sudeste do Brasil

Abstract: and simultaneously extracted metals (SEM) were combined in order to verify the ecological hazard of contaminated sediments from the Santos-Cubatão Estuarine System (SE Brazil), which is located in one of the most industrialized areas in the Latin America. Intertidal sediments from the Morrão River estuary were collected seasonally in short cores. The redox conditions, organic matter contents and grain-size were the main controlling factors on SEM distribution. However, clear relationships among these variables… Show more

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Cited by 11 publications
(16 citation statements)
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“…A similar behavior was observed in other tropical (Bava and Seralathan 1999) and temperate climate (Canário et al 2003) estuaries. Nizoli and Luiz-Silva (2009) found Eh values more reducing in the summer (12 ± 35 mV) than in the winter (57 ± 39 mV) in sediment cores from the Morrão River, which is in agreement with the present study. …”
Section: / CLsupporting
confidence: 93%
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“…A similar behavior was observed in other tropical (Bava and Seralathan 1999) and temperate climate (Canário et al 2003) estuaries. Nizoli and Luiz-Silva (2009) found Eh values more reducing in the summer (12 ± 35 mV) than in the winter (57 ± 39 mV) in sediment cores from the Morrão River, which is in agreement with the present study. …”
Section: / CLsupporting
confidence: 93%
“…Acid-volatile sulfides (AVS) are considered as particularly important phases that can influence the metal distribution in anoxic/suboxic conditions (Di Toro et al 1990, Burton et al 2005, Machado et al 2010. In sediments from the study area, Nizoli and Luiz-Silva (2009) concluded that the AVS levels are lower in the summer (0.87 ± 1.1 µmol g − 1 ) than in the winter (5.8 ± 9.2 µmol g − 1 ). Higher AVS levels in the winter can contribute to explain the lower pore water levels of Cu, Ni and Zn in this period.…”
Section: Non-conservative Elements In Watermentioning
confidence: 94%
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“…52 Gravimetria com íons prata, 53 espectrofotometria pelo método do azul de metileno [54][55][56] ou, ainda, a determinação potenciométrica usando eletrodo íon seletivo (EIS) 57,58 são os métodos mais citados na literatura. Há variações no método de extração, as quais podem seguir o mesmo princípio do original 59 ou utilizar a técnica dos filmes finos.…”
Section: Métodos De Determinação De Sva E Mesunclassified
“…64 A ordem de solubilidade dos sulfetos metálicos de interesse ambiental é: FeS > NiS > ZnS > CdS > PbS > CuS. 54 Os sulfetos de níquel (milleritaNiS, heazlewoodita -Ni 2 S 3 e vaesita -NiS 2 ), cobre (covellita -CuS e calcocita -Cu 2 S) e mercúrio (cinábrio -HgS) [62][63][64][65] não são destruídos pela extração dos SVA, empregando-se HCl a frio: a recuperação destes metais enquanto MES se deve à detecção daquele estoque que se encontra interagido com outra fase ligante, como a matéria orgânica, por exemplo. …”
Section: Figura 1 Representação Esquemática Do Sistema Extrator Paraunclassified