Quantificação de metais (Al, Fe, Mn, Pb, Zn e Cu) nos sedimentos do sistema estuarino das Ilhas de Tinharé-Boipeba (Bahia - Brasil)

• Ano de defesa: 2011
• Autor(a) principal: Silva, Anna Paula Fagundes da
• Orientador(a): Santos, Joana Mara Teixeira
• Banca de defesa: Simões Filho, Francisco Fernando Lamego , Marques, Mônica Regina da Costa
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade do Estado do Rio de Janeiro
• Programa de Pós-Graduação: Programa de Pós-Graduação em Química
• Departamento: Centro de Tecnologia e Ciências::Instituto de Química
• País: BR
• Palavras-chave em Português: Baixo Sul; Sedimento; Estuário; BCR 701
• Palavras-chave em Inglês: Metals; Baixo Sul; Sediment; Estuary; BCR 701
• Área do conhecimento CNPq: CNPQ::CIENCIAS EXATAS E DA TERRA::QUIMICA
• Link de acesso: http://www.bdtd.uerj.br/handle/1/15689

The estuaries of Tinharé-Boipeba Island are inserted in region called Baixo Sul baiano (Bahia Brazil), brazilian northeast coast and have a connection with the ocean for three principals locals, Morro de São Paulo, Boipeba and Barra dos Carvalhos. Information about the presence of metals in the sediments was almost absent for this region. In these estuaries were collected 40 samples for sediments, where the metals concentration was analyzed (Al, Cu, Fe, Mn, Pb e Zn) through the aqua regia extraction procedure of the reference material BCR-701 (RAURET et al., 2001). Low concentrations of metals were registered on the proximity of the connection with the ocean and at the Canal de Garapuá and Rio Grande. High concentrations, but practically according to values of reference in CONAMA 344/04, were registered in Una River, at the most part of the Cairu River, das Almas River, almost part of the stations, the east side of Cairu River and in the middle part of dos Patos River. The metals concentrations (mg/kg 1) presented values in the following ranges Al (3.57 x 104 at 3.19 x 102), Cu (1.02 x 102 at 0.35), Fe (4.33 x 104 at 2.05 x 102), Mn (1.44 x 103 at 2.73), Pb (6.67 x 101 at 2.66) and Zn (5.08 x 102 at 3.18). Through the statistic PCA (Principal Component Analysis) and the graphic correlation between the sediment granulometry (sand, silt, clay) and the metals, observed the higher concentrations of metals with the increase of percentage of silt and the decrease of percentage of sand. Likewise was identified a strong correlation between the occurrence of phosphorus and the presence of metals. Believes that the principal chemistry specie involved is the phosphate (PO43 or P2O5) that is a hard base, where the binding occurs through the oxygen, that the ionic character and relevant. No correlation between the presence of metals and clay was identified. This fact was assigned for a low content for this granulometry for all samples in the study and the composition the clay of these estuaries