Assessment of trace metals contamination in estuarine sediments using a sequential extraction technique and principal component analysis

Passos, Elisangela de Andrade; Alves, Jeferson Cavalcante; Santos, Izaias Souza dos; Alves, José do Patrocínio Hora; Garcia, Carlos Alexandre Borges; Costa, Antônio Celso Spı́nola

doi:10.1016/j.microc.2010.01.018

Cited by 253 publications

(130 citation statements)

References 43 publications

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“…The optimized three-stage sequential extraction procedure proposed by the European Community Bureau of Reference (BCR) is a useful approach to reveal the different affinity to various solid-phase fraction samples, including freshwater sediments, salt water sediments, soil, sewage sludge and particulate matter. Furthermore, the method has been widely applied and adopted by a large number of researchers to study the speciation and possible associations between metals and sediment components [11]. Evaluating metal speciation can provide detailed information concerning the origin, mobilization, biological availability and toxicity of metals.…”

Section: Introductionmentioning

confidence: 99%

Speciation of Metals and Assessment of Contamination in Surface Sediments from Daya Bay, South China Sea

et al. 2014

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Abstract:The contents, speciation, source factors and potential ecological risks of the selected metals (Cr, Ni, Cu, Pb, Zn, Cd and As) were analyzed in surface sediments from Daya Bay (DYB). The results show that, with the exception of Pb, metal concentrations have decreased at all sites over the past decade. The distribution features of these concentrations represent a ring shape that descends from shore to bay by varying degrees. Speciation analysis showed that Cr, Ni, Cu, Zn and As exist mainly in the residual fraction and, thus, are of low bioavailability, while Cd and Pb were found to be abundant in the non-residual fraction and, thus, have high potential mobility. The ratio of heavy metals in non-residual form in descending order is Pb (78.83%), Cd (78.65%), Cu (48.54%), Zn (48.10%), Ni (38.31%), Cr (28.43%) and As (27.76%). The ratio of Pb content is the highest, meaning the highest mobility of Pb. The metals' potential ecological risks to the environment were also assessed using the methods of the mean effect range-median quotient and the criteria of OPEN ACCESS Sustainability 2014, 6 9097 risk assessment code. The results showed that Cd presents the highest risk, and Pb and Cu are generally considered to be medium risks in the sub-basins of Daya Bay. The principal component analysis (PCA) revealed that natural coastal weathering and erosion of rock caused the highest input, followed by mariculture and industrial wastewater and, finally, domestic sewage discharge.

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Section: Introductionmentioning

confidence: 99%

Speciation of Metals and Assessment of Contamination in Surface Sediments from Daya Bay, South China Sea

et al. 2014

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“…Cd is one of the most hazardous and extremely toxic elements, and use of water high in Cd could cause severe health effects to consumers and even death (Hammer and Hammer Jr, 2004;Passos et al, 2010;Rajappa et al, 2010). The highest Cd concentration is found in the drainages and some of the stream water sources from the waste of the Zn-Cd-rich mine deposits.…”

Section: Discussionmentioning

confidence: 99%

Toxic element contamination in waters from the massive sulfide deposits and wastes around Giresun, Turkey

Karakaya¹,

KARAKAYA²

2014

Turkish J Earth Sci

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“…Dessa forma, o risco de contaminação da biota por tais metais está relacionado, sobretudo, à fraca ligação dos metais adsorvidos às partículas por forças iônicas. Passos et al (2010) afirmam que a maior parte da fração trocável dos metais é fracamente ligada aos sedimentos, portanto, considerada muito instável e reativa. Egreja (2000) acrescenta o pH como um parâmetro limitador, pois tem grande influência na adsorção dos metais pelos óxidos, matéria orgânica e argila, visto que à medida que o pH aumenta, aumenta a adsorção dos metais.…”

Section: Rio Caceribuunclassified

Distribuição de metais pesados nos sedimentos de fundo dos rios Caceribu e Guaxindiba, afluentes da Baía de Guanabara - Rio de Janeiro, Brasil

et al. 2014

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ResumoOs rios Caceribu e Guaxindiba são dois importantes tributários da Baía de Guanabara, no Rio de Janeiro, Brasil. Ambos estão inseridos em duas importantes áreas protegidas, ainda sim, são passivos de contaminação por diversas fontes de contaminação. O objetivo do presente trabalho foi avaliar a concentração de metais pesados (Cu, Cd, Pb, Ni, Mn, Zn e Cr) nas frações dos sedimentos de fundo dos rios Caceribu e Guaxindiba. Para isso, as seguintes análises foram realizadas: mineralogia, concentração total de metais pesados, matéria orgânica e extração sequencial dos metais pesados de acordo com o método de Tessier et al. (1979). A análise mineralógica mostrou que os sedimentos são compostos principalmente de microclina e muscovita, com intercalações de albita, gipsita e argilominerais (esmectita e caulinita). No rio Guaxindiba, a mineralogia foi similar (microclima, muscovita, albita, gipsita e intercalações de hematita). Com exceção do Mn, todos os metais pesados avaliados nos sedimentos do rio Guaxindiba apresentaram concentração total maior que aquela encontrada nos sedimentos do rio Caceribu, variando de 0,20 a 3,29%, enquanto o rio Guaxindiba variou de 1,93 a 21,60%. No rio Caceribu, as duas frações dominantes foram S4 (orgânica) 69,13% Cu, 86,56% Cd e 46,88% Pb; S5 (residual) 39,25% Mn, 26,80% Zn e 73,50% Cr. Com exceção do Zn, todos os demais elementos seguiram a mesma tendência no rio Guaxindiba: fração S4 44,80% Cu, 88,99% Cd, 26,59% Ni, 57,59% Pb e 71,69% Cr, e fração S5 28,72% Mn. Palavras-chave: sedimento, metal pesado, extração sequencial, Rio Caceribu, Rio Guaxindiba. AbstractThe Caceribu and Guaxindiba Rivers are two important tributaries of Guanabara Bay, in Rio de Janeiro, Brazil. Both of them are included in two environmentally protected areas, but they are still passive from contamination sources. The objective of the present work was to evaluate heavy metal concentrations (Cu, Cd, Pb, Ni, Mn, Zn, and Cr)

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Assessment of trace metals contamination in estuarine sediments using a sequential extraction technique and principal component analysis

Cited by 253 publications

References 43 publications

Speciation of Metals and Assessment of Contamination in Surface Sediments from Daya Bay, South China Sea

Speciation of Metals and Assessment of Contamination in Surface Sediments from Daya Bay, South China Sea

Toxic element contamination in waters from the massive sulfide deposits and wastes around Giresun, Turkey

Distribuição de metais pesados nos sedimentos de fundo dos rios Caceribu e Guaxindiba, afluentes da Baía de Guanabara - Rio de Janeiro, Brasil

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