Geochemistry of iron and manganese in soils and sediments of a mangrove system, Island of Pai Matos (Cananeia — SP, Brazil)

Otero, Xosé Luís; Ferreira, Tiago Osório; Huerta-Díaz, Miguel Ángel; Partiti, C. S. M.; Souza, Vanessa Cristina de Oliveira; Vidal‐Torrado, Pablo; Macı́as, Felipe

doi:10.1016/j.geoderma.2008.10.016

Cited by 174 publications

(129 citation statements)

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“…Water level fluctuation resulted in Eh values from 66 to 74 mV. Eh values in this study ranged from oxic (>300 mV) to suboxic (100-300 mV) (Figure 2), in the reduction range from Mn 4+ to Mn 2+ , usually between 200 and 300 mV (Sousa et al, 2009), and do not reach typical values for anoxic environments (Eh <100 mV, pH = 7), as those reported in other studies (Ferreira et al, 2007a,b;Otero et al, 2009Otero et al, , 2010. Ferreira et al (2007b) also observed a substantial variation in the redox conditions for rhizophora woods in the Cananeia Lagoon System, Brazil, triggering variation in the redox conditions.…”

Section: Pedons Formed Under Fluvial Influencesupporting

confidence: 74%

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Genesis, Characterization, and Classification of Mangrove Soils in the Subaé River Basin, Bahia, Brazil

Bomfim

Santos

Costa

et al. 2015

Rev. Bras. Ciênc. Solo

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Preservation of mangroves, a very significant ecosystem from a social, economic, and environmental viewpoint, requires knowledge on soil composition, genesis, morphology, and classification. These aspects are of paramount importance to understand the dynamics of sustainability and preservation of this natural resource. In this study mangrove soils in the Subaé river basin were described and classified and inorganic waste concentrations evaluated.

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Section: Pedons Formed Under Fluvial Influencesupporting

confidence: 74%

“…Lower Eh values in deeper layers are usual in estuarine environments (Ferreira et al, 2007a;Otero et al, 2009). Although this proposition is applicable to all pedons assessed, it was observed that, in P3 and P4, the horizons with highest Eh values were concentrated in the subsurface layers (Figure 2).…”

Section: Pedons Formed Under Fluvial Influencementioning

confidence: 77%

Genesis, Characterization, and Classification of Mangrove Soils in the Subaé River Basin, Bahia, Brazil

Bomfim

Santos

Costa

et al. 2015

Rev. Bras. Ciênc. Solo

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“…These oscillations may be the result of the precipitation and dissolution behavior of Mn in differently oxidized sediments. 44 The content of metals in either core are less than sediments collected from more urbanized Brazilian estuaries. 28,29,45 Contrary to contents, EFs were slightly higher in PAA than GTA (open circles Figures 3 and 4).…”

Section: Discussionmentioning

confidence: 96%

Influence of Anthropogenic Activities on Trace Metal Accumulation in Brazilian Mangrove Sediments

Conrad

Sanders

2017

Rev. Virtual Quim.

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Resumo: Dois testemunhos de sedimento foram coletados em margem de manguezais para estudar os efeitos de atividades antrópicas na região de Paranaguá, no Brasil. Conteúdos, fluxos e fatores de enriquecimento (FE) de metais-traço foram calculados. Os conteúdos de metais-traço (Hg, Zn, Pb, Ni, Co, Mn e Cu) variaram ao longo dos testemunhos e entre os dois locais, mas não foram indicativos das taxas de acumulação ou EF. Enriquecimentos leves desses metais foram observados de forma consistente com atividades de mineração na área de estudo, ocorridas antes de 1900. Foram observados múltiplos aumentos das taxas de fluxo. Um deles foi congruente com a atividade de mineração pré-industrial que foi observada em ambos os testemunhos. O outro pico de fluxo só foi detectado em um testemunho, ocorrendo após 1990 e não foi acompanhado por nenhum enriquecimento. Este aumento de fluxo foi devido ao desenvolvimento urbano, causando aumento da deposição de partículas de grãos finos nos manguezais da Baía de Laranjeiras. Além de avaliar os impactos das atividades antrópicas em manguezais desta área, um ponto focal adicional deste trabalho foi mostrar os significados do conteúdo, do fluxo e do FE em estudos sobre poluição de sedimentos costeiros. A validade do uso de dados de fluxo e EF, além dos conteúdos de metais, para discernir tendências de contaminação em sedimentos de mangue é discutida.Palavras-chave: Fatores de enriquecimento; metais pesados; fluxo de metais; desenvolvimento urbano; atividades de mineração; Hg; Zn; Pb; Ni; Co; Mn; Cu. AbstractTwo sediment cores were collected at the margins of well-developed mangrove forests to study the effects of anthropogenic activities in the Paranagua region of Brazil. Calculations of sediment trace metal content, flux, and enrichment factors (EF) were performed. Trace metal (Hg, Zn, Pb, Ni, Co, Mn and Cu) contents showed differing values down core and amongst sites, which were not indicative of metal accumulation rates or EF. Slight enrichments of these metals were observed congruent with mining activities in the area occurring prior to 1900. Multiple rapid increases of flux rates were observed, one congruent with pre-industrial mining activity which was observed in both sediment cores. The other flux spike was only detected in one sediment core, occurring post 1990, and was not accompanied by any enrichment. This increase in flux is believed to be due to upstream urban development causing increased fine grain particle deposition in the mangroves of Laranjeiras Bay. Beyond assessing impacts of anthropogenic activities on mangroves of this area, an additional focal point of this work is to show the significance of content flux and EF in studies concerning coastal sediment pollution research. The validity of using flux and EF data, in addition to metals contents, to discern contamination trends in mangrove sediments is discussed.

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“…In this environment, therefore, sediments can play a double role, both as a carrier and as a possible source of contaminants. Because of the ubiquitous presence of heavy metals, their persistence, and their ability to create hazardous conditions in the environment, a number of studies have been carried out all over the world to assess the levels of different elements in mangrove sediments [26][27][28][29][30][31][32]. The objectives of this study were to (1) determine the concentrations of certain trace metals (Fe, Mn, Cr, Cu, Pb, Zn, Co, Ni, Ba, Sr, V and Rb) in core sediments of Pichavaram lagoon.…”

Section: Introductionmentioning

confidence: 99%

Geochemistry of Core Sediments from Tropical Mangrove Region of Tamil Nadu: Implications on Trace Metals

Kalaivanan¹,

Jayaprakash²,

Nethaji³

et al. 2017

J Earth Sci Clim Change

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The present study aims to determine the concentrations of certain trace metals (Fe, Mn, Cr, Cu, Pb, Zn, Co, Ni, Ba, Sr, V and Rb) and to identify the possible sources of the trace metals with multivariate analyses and assess the metal contamination using the enrichment factor (EF) and geo-accumulation index (I geo ) from the two core samples taken from Pichavaram lagoon. Pichavaram mangrove is a dynamic intertidal environment lying in between Vellar and Coleroon estuaries in Cauvery delta along the east coast of India. High OM in the present study is noted in both core samples which are mainly controlled by productivity and sediment texture. The increase of trace metals concentrations was observed at lower intersects which indicates that the trace metals were reprecipitated around the redox boundaries.Further it signifies that the enrichment of metals in C1 core sample is closely related to the diagenetic. Factor 1 with significant positive loadings on Mud and good loadings on Fe and Mn suggests the associations of these metals with finer sediment fractions and aluminosilicates. These elements to be enriched in the clay fraction in both core samples. They are mainly related to anthropogenic inputs and reflect the complexing nature of the organic matter. I geo studies confirm the contamination of the study area. Overall the study highlights significant anthropogenic contributions in terms of heavy metal pollution. Comparative data for normalized enrichment factors and the modified degree of contamination show that Pichavaram sediments have suffered significant systematic heavy metal contamination following catchment urbanization.

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Geochemistry of iron and manganese in soils and sediments of a mangrove system, Island of Pai Matos (Cananeia — SP, Brazil)

Cited by 174 publications

References 74 publications

Genesis, Characterization, and Classification of Mangrove Soils in the Subaé River Basin, Bahia, Brazil

Genesis, Characterization, and Classification of Mangrove Soils in the Subaé River Basin, Bahia, Brazil

Influence of Anthropogenic Activities on Trace Metal Accumulation in Brazilian Mangrove Sediments

Geochemistry of Core Sediments from Tropical Mangrove Region of Tamil Nadu: Implications on Trace Metals

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