Geochemistry of intertidal sediment pore waters from the industrialized Santos-Cubatão Estuarine System, SE Brazil

Gonçalves, Winston F.O.; Luiz-Silva, Wanilson; Machado, Wilson; Nizoli, Érico Casare; Santelli, Ricardo Erthal

doi:10.1590/s0001-37652012005000021

Cited by 12 publications

(11 citation statements)

References 50 publications

(36 reference statements)

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“…Sites cores from NR1 and SR1 sites have the lowest sedimentation rate amongst the six sampled stations because these sites are inundated by tides, and they receive considerable amount of runoff water resulting in erosion and loss of sediments. Other factors contributing to the low sedimentation rates at these sites could be due to (1) physical and biological mixing at or near the sediment-water interface in surface sediments resulting in a flat 210 Pb activity profile versus depth (Tylmann 2004), and (2) chemical diffusion or advection within the pore water at these sites (Gonçalves et al 2012). …”

Section: Discussionmentioning

confidence: 99%

Temporal and spatial distribution of trace metals in the Rufiji delta mangrove, Tanzania

Minu

Routh

Dario

et al. 2018

Environ Monit Assess

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Spatial and temporal distribution of trace metals and their cycling is a key issue for understanding the ongoing biogeochemical processes in coastal environments. Sediment cores were collected from six different sampling locations from the Rufiji delta mangrove forests in southeastern coastal Tanzania that are perceived to be impacted by urban development and agricultural activities in the catchment, and pollution in upstream sections of the Rufiji River. The chronology and sediment accumulation rates at these sampling sites were derived based on the distribution of 210Pbexcess method. The trace metals (As, Cd, Cr, Cu, Ni, Pb, and Zn) were sequentially extracted as per the BCR method and analyzed. The results indicate that the mass accumulation rates range from 0.40 g cm−2 year−1 (cores NR3 and NR4) to 1.75 g cm−2 year−1 (core SR1). Trace metals in the cores are mainly associated with the residual phase and their abundances in sediments are ranked as Cr > Zn > Ni > Cu > Pb > Cd. The results imply that trace metals in the Rufiji delta mangroves are mainly of crustal origin, and they are less sensitive to weathering. Further, these metals are least available for uptake by plants and they pose limited threat to the biota.

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Section: Discussionmentioning

confidence: 99%

Temporal and spatial distribution of trace metals in the Rufiji delta mangrove, Tanzania

Minu

Routh

Dario

et al. 2018

Environ Monit Assess

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“…We thank one anonymous reviewer for their constructive comments that have improved the paper. (2000) Tagus Estuary Portugal 18-40 Percuoco et al (2015) Great Bay Estuary USA 50-1400 De Vittor et al (2012) Marano-Grado Lagoon Italy 52-900 Zhang et al (2013) Pearl River Estuary China 64-321 Vidal and Morgui (1995) Alfacs Bay Spain 100-600 Magni et al (2014) Shinkawa-Kasugawa Estuary Japan 200-500 Lohrer et al (2010) Mahurangi Estuary New Zealand 257-1542 Pérez- Villalona et al (2015) San Juan Bay Estuary Puerto Rico 461-572 Cook et al (2004) Huon Estuary Australia 500 Clavero et al (2000) Palmones River Estuary Spain 500-3500 Bally et al (2004) Seine Estuary France 1940 Gonçalves et al (2012) Santos-Cubatao Estuarine System Brazil 2495-4989 This study Application rate 150 g N m −2 Application rate 600 g N m −2 64-10,275 11-18,842…”

Section: Author Contribution Statementmentioning

confidence: 99%

In situ soft sediment nutrient enrichment: A unified approach to eutrophication field experiments

Douglas

Pilditch

Hines

et al. 2016

Marine Pollution Bulletin

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Adding fertiliser to sediments is an established way of studying the effects of eutrophication but a lack of consistent methodology, reporting on enrichment levels, or guidance on application rates precludes rigorous synthesis and meta-analysis. We developed a simple enrichment technique then applied it to 28 sites across an intertidal sandflat. Fertiliser application rates of 150 and 600 g N m −2 resulted in pore water ammonium concentrations respectively 1-110 and 4-580 × ambient, with greater elevations observed in deeper (5-7 cm) than surface (0-2 cm) sediments. These enrichment levels were similar to eutrophic estuaries and were maintained for at least seven weeks. The high between-site variability could be partially explained by the sedimentary environment and macrofaunal community (42%), but only at the high application rate. We suggest future enrichment studies should be conducted in situ across large environmental gradients to incorporate real world complexity and increase generality of conclusions.

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“…Estudos sobre a alteração da qualidade dos solos, sedimentos, ar e águas (superficiais e subterrâneas) nesta porção do litoral paulista (CETEsB 1998, sIQuEIRA et al 2004, sIlVA 2004, sIMÕEs 2007, HORTEllANI et al 2008, gOMEs et al 2009, gONÇAlVEs et al 2012 indicam que o setor industrial constitui uma das principais fontes de poluição, em função das emissões de carga poluente superior à capacidade de assimilação dos sistemas estuarinos de santos-Cubatão e de são Vicente. somam-se a essas fontes aquelas associadas à lixiviação de áreas contaminadas, efluentes domésticos e lançamento de sedimentos contaminados dragados dos canais portuários.…”

Section: Introductionunclassified

Caracterização da contaminação por metais pesados em área de mangüezal, Município de Santos (SP)

et al. 2012

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REsuMOO presente trabalho teve como objetivo caracterizar a contaminação do solo e das águas subterrâneas e superficiais por metais pesados em uma área de manguezal em santos (sP), utilizada como local de descarte de resíduos das atividades portuárias por mais de 50 anos. Análises químicas do solo e das águas coletados no local de estudo indicaram que as concentrações de íons de metais pesados (Pb, Zn, Cu, Ni) encontram-se acima dos valores de referência de qualidade da CETEsB. O elevado teor de matéria orgânica do manguezal deve ser o principal responsável pela fixação iônica dos metais no solo. Análises químicas do líquido percolado do aterro, coletado em lagoa próxima, também indicaram a presença de Pb 2+ em quantidades elevadas. Extrações de metais do solo com água (fase solúvel) e HNO 3 (fases solúvel e adsorvida) indicam a lixiviação desses íons sob condições específicas, o que pode intensificar a dispersão desses contaminantes no ambiente.Palavras-chave: metais pesados, manguezal, aterro, santos. ABsTRACTThis study aimed at evaluating the contamination of soil and superficial and ground waters by heavy metals in a mangrove in santos Municipality (são Paulo state), where waste from port operations has been disposed for over 50 years. Chemical analyses of soil and water samples collected in the study area indicated that the concentrations of heavy metals ions (Pb, Zn, Cu, Ni) are above the reference values of the Companhia Ambiental do Estado de são Paulo -CETEsB (são Paulo state Environmental Agency). The high content of organic matter in the mangrove is probably the main cause of ionic fixation of these metals in the soils. Chemical analysis of the percolated liquid from the landfill, collected in a lagoon, also showed high concentration of Pb. Metal extraction from soils with water (soluble phase) and HNO 3 (soluble and adsorbed phases) indicates that the lixiviation of these ions occurred under specific conditions, which can increase the dispersion of these contaminants in the environment.

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Geochemistry of intertidal sediment pore waters from the industrialized Santos-Cubatão Estuarine System, SE Brazil

Cited by 12 publications

References 50 publications

Temporal and spatial distribution of trace metals in the Rufiji delta mangrove, Tanzania

Temporal and spatial distribution of trace metals in the Rufiji delta mangrove, Tanzania

In situ soft sediment nutrient enrichment: A unified approach to eutrophication field experiments

Caracterização da contaminação por metais pesados em área de mangüezal, Município de Santos (SP)

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