Spatial distribution and accumulation of heavy metals in tidal flat sediments of Shanghai coastal zone

Chen, Zhenlou; Liu, Peifang; Xu, Shiyuan; Liu, Lin; Yu, Jia; Yu, Lizhong

doi:10.1007/bf02884828

Cited by 26 publications

(15 citation statements)

References 15 publications

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“…At tidal flat, heavy metals deposit with the particles and accumulate in the sediment through various complex physical, chemical and biological processes, then enter the food chain and take part in the ecological cycle finally (Shen et al 1992). Although research results on the spatial distribution and dynamic accumulation characteristics of heavy metals in the tidal flat sediments of Yangtze estuary indicated that the spatial distribution of Cu, Zn, Cr and Pb in the sediment was not directly influenced by the coastal sewage discharge in the whole estuary area, and were closely related to the local sedimentary dynamic conditions (Chen et al 2000;Xu et al 1997), the sewage discharge had definite impact on the total contents and distribution of heavy metals in the local tidal flat sediments (Bi et al 2003a, b;Brack et al 2001;Feng et al 2004;Lee and Cundy 2001;Zhang et al 2001;Zhou et al 2008).…”

Section: Introductionmentioning

confidence: 96%

Heavy metal pollution and assessment of the tidal flat sediments near the coastal sewage outfalls of shanghai, China

Deng

Wang

et al. 2009

Environ Earth Sci

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Zn, Cu, Cr and Pb concentrations of the sediment collected from three tidal flat sites of Yangtze estuary were investigated in October 2003. Results showed that the average concentrations of heavy metals in the sediments were two to three times to the environment background values of Yangtze estuary tidal flat sediment. The heavy metal concentrations in the sediments near the Bailonggang (BLG) and Laogang (LG) sewage outfalls were obviously higher than those of Chaoyang (CY) tidal flat where there are no sewage outfalls near the coast. And the concentrations of heavy metals in the surface sediments of LG tidal flat decreased with the increasing of the distance to the sewage outfalls. The heavy metal concentration profile in the sediment core changed with the depth, and generally reached maximum values at the depth of plant roots. The assessment results showed that the sediments of LG, BLG and CY tidal flat had been polluted by heavy metals in different level. The pollution degree of heavy metals in the sediments was as follows: Zn [ Cu [ Pb [ Cr. The potential ecological risks of the four heavy metals in three tidal flat sites sediment were all at a middle level, and Cu and Pb made the main contributions. The adverse ecological effects caused by the four heavy metals did not occur frequently.

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Section: Introductionmentioning

confidence: 96%

Heavy metal pollution and assessment of the tidal flat sediments near the coastal sewage outfalls of shanghai, China

Deng

Wang

et al. 2009

Environ Earth Sci

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“…Apesar do elemento Ni normalmente se encontrar na fração residual, Souza et al (1986) afirmam que, em geral, todos os metais, com a exceção do Pb, apresentam concentrações maiores com o aumento da salinidade, mas a presença de fontes antropogênicas ao longo dos cursos fluviais impede uma discussão mais aprofundada deste aspecto. Outro fator influenciador na concentração de carbonatos é que nessas regiões estuarinas, como explanado por Jurner e Brian (1965), Hinrich e Clark (1985), Chen et al (2000), parte do carbonato presente nos sedimentos será dissolvido durante a lixiviação com água dos rios.…”

Section: Rio Guaxindibaunclassified

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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“…These toxicants may accumulate in food chains and present threats to human health finally [2]. The researches about the ecotoxicity of heavy metals always distract global attentions [3][4][5][6]. The surface sediments play a important role in the transfers of heavy metals as a main part of circulation of substance in marine environments [7].…”

Section: Introductionmentioning

confidence: 99%

Distribution, Speciation and Ecological Risk Assessment of Heavy Metals in the Surface Sediments of Sanmen Bay in ZheJiang

Hu¹,

Zhao²,

Liu³

et al. 2017

Proceedings of the 2017 6th International Conference on Energy, Environment and Sustainable Development (ICEESD 2017)

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Abstract. This Surface sediment samples were collected from Sanmen Bay in Zhejiang. The distribution of total concentration of five heavy metals (Zinc, Chromium, Cadmium, Copper, and Lead) was determined, and their speciation using BCR sequential extraction procedure was investigated. The pollution level and ecological hazard of these heavy metals were evaluated Potential Ecological Risk Index (Er i ). The distribution of five metals showed that the total concentrations in inner bay were higher than those in out of bay. The results of metal speciation in surface sediment show that the residual fraction of four metal except for Pb predominated, of which Zn account for 79.20%~84.25%, Cr 93.24%~96.16%, Cd 34.71%~57.58%, and Cu 66.06%~79.51%, respectively. The dominate fraction of Pb is the part bounded to amorphous Fe and Mn oxides and hydroxides, which accounts for 58.17%~72.7%. The evaluation results indicate that Cd is the primary element with slight ecological risk in the area according to the potential ecological risk index (Er i ).

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Spatial distribution and accumulation of heavy metals in tidal flat sediments of Shanghai coastal zone

Cited by 26 publications

References 15 publications

Heavy metal pollution and assessment of the tidal flat sediments near the coastal sewage outfalls of shanghai, China

Heavy metal pollution and assessment of the tidal flat sediments near the coastal sewage outfalls of shanghai, China

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

Distribution, Speciation and Ecological Risk Assessment of Heavy Metals in the Surface Sediments of Sanmen Bay in ZheJiang

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