Metal concentration in sediments from the Santos estuarine system: a recent assessment

Bordon, Isabella C.; Sarkis, J.E.S.; Gobbato, Gustavo Maluf; Hortellani, Marcos Antonio; Peixoto, Claudia Marques

doi:10.1590/s0103-50532011001000005

Cited by 36 publications

(20 citation statements)

References 5 publications

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“…Some are considered essential micronutrients, while others do not possess known biological function and, depending on the oxidation state, present extreme toxicity, necessitating the monitoring of aquatic environments (Karedede-Akin & Ünlü, 2007). Thus, sediment has been widely used as an environmental quality indicators (e.g., Bordon et al, 2011;Buruaem et al, 2013;Kim et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Trace elements in an adjacent channel of an anthropized area: a case study of Baixada Santista, Southeastern Brazil

Salaroli¹,

Kim²,

Angeli³

et al. 2024

Ecotoxicol. Environ. Contam.

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In recent decades, due to intensive industrialization, the Baixada Santista has undergone an intense process of environmental degradation. The metals are toxic and persistent in varying concentrations and oxidation states and may be incorporated in sediments and biota. Thus, understanding the importance of this contamination is necessary for coastal planning. This study provides a basis for understanding the levels of metal and As contamination in the Bertioga Channel (SP). The levels of Al, As, Cd, Cr, Cu, Fe, Mn, Ni, Pb, Sc, V and Zn in superficial sediment samples were determined by ICP-OES. The degree of sediment contamination was evaluated according to the sediment quality standards set by the Canadian environmental agency (ISQG and PEL) and by statistical tests. All values were below PEL, and most of the sample values were below ISQG, except for As, Cu and Pb. From a cluster analysis, it was possible to differentiate eastern and western parts of the channel due to their distinct hydrodynamic patterns. Furthermore, it was possible to separate the trace elements by geochemical behavior, in which Cu, Pb and Zn were linked to a small anthropogenic contribution. Thus, this study detected small anthropogenic contributions from an adjacent channel of an anthropized area, but most of the results were linked to natural geochemical processes.

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Section: Introductionmentioning

confidence: 99%

Trace elements in an adjacent channel of an anthropized area: a case study of Baixada Santista, Southeastern Brazil

Salaroli¹,

Kim²,

Angeli³

et al. 2024

Ecotoxicol. Environ. Contam.

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“…Among the studies regarding contamination in the Bertioga Channel are LAMPARELLI et al (2001) that found levels of mercury between TEL and PEL in the sediment of the Bertioga Channel, next to the Santos Channel; ABESSA et al (2008) that ranked the Bertioga Channel as the third most contaminated area in Santos Estuarine System based on integrative approach of both environmental factors and contaminants; SILVA et al (2011) that found high values of zinc and arsenic in the region of the Santos Estuarine System; BORDON et al (2011) that foud mercury concentrations above TEL limit levels in sediment of the north outfall of the Bertioga Channel and other metal contamination confirmed for the bentic ecosystem of the Santos Estuarine System; GONÇALVES et al (2013) that found no significant levels of contaminants in the channel but arsenic ;and SOUSA et al (2014), who performed the most recent survey in the channel, found cadmium in concentration levels above TEL as well as LABs (linear alkylbenzene sulfonates), which indicates the presence of household sewage and aromatic cyclic hydrocarbons.…”

Section: Introductionmentioning

confidence: 99%

Ichthyofauna as an environmental quality indicator of the Bertioga Channel, São Paulo (Brazil)

et al. 2017

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Ichthyofauna as an environmental quality indicator of the Bertioga Channel, São Paulo (Brazil)The aim of this study was to investigate the ichthyofauna structure in the region of the north outfall of the Bertioga Channel (São Paulo, Brazil) and the possible effects of the environmental quality loss. The samples were collected in a monthly basis, from September to December 2005, at two oceanographic stations with an otter-trawl. The fish fauna structure was evaluated by ecological indicators and the environmental quality evaluated by the ABC analysis and the Estuarine Fish Communities Index (EFCI). A total of 1553 individuals from 50 species were sampled. Ariidae and Sciaenidae amounted to 60 % and Cathorops spixii represented 36 % of all specimens collected. The highest richness and ecological diversity were recorded in December, while the highest numerical abundance was found in October. The majority of the species were represented by juveniles. The cluster analysis and canonical correspondence analysis showed a consistent and clear difference between the sampling stations, and the abiotic factors analyzed (temperature, depth and salinity) do not seem to have influence on the community structure. The ABC analysis suggested a moderate disturbed environment and the EFCI allowed classifying the area as "poor", due to the 12 metrics analyzed, concerning the reduction of the species diversity, composition and abundance, and modifications in the nursery function and trophic integrity of the area.

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“…Benthic biota is exposed to metallic pollutants accumulated within the sediments, which may transfer potentially toxic concentrations through the food web to organisms on higher trophic levels. The scientific community has shown increasing interest in the area and studies on contamination in sediments have been undertaken and contaminant variability along sedimentary cores has been widely evaluated to assess the history of toxic element pollution in aquatic environments (BORDON et al, 2011;FUKUMOTO (2007):…”

Section: Introductionmentioning

confidence: 99%

Reconstruction of historical trends in potentially toxic elements from sediment cores collected in Bertioga channel, southeastern Brazil

et al. 2013

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A B S T R A C TThe study presents an evaluation of potentially toxic elements deposition in Bertioga Channel (Southeastern Brazilian coast) along the last 150 years, the main anthropogenic activity period in the area. Five sediment cores by means of ICP-OES to determine the levels of metals (Cd, Cr, Cu, Ni, Pb and Zn) and As. The pollution load index (PLI) and enrichment factor (EF) were calculated to identify the relative elements toxicity of the sediments and the anthropogenic contribution of the investigated elements. The indexes indicated the absence of contamination but a higher input of As in cores B2 and B5, which have been sampled in an area that presents higher sedimentation rates. Through an statistical analysis of time series decomposition, it was verified that the metals flux to the area follow the cycles of rainy (austral summer and autumn) and dry seasons (austral winter and spring). In conclusion, the enrichment corresponds to the end of the 19th Century, when Santos Harbor was inaugurated, and to the 1970s, when Santos Harbor activities expanded. In addition, the analysis of the indexes and the temporal decomposition indicate that these elements' input to Bertioga Channel is due to natural processes of weathering and sedimentation. R E S U M OEste estudo apresenta uma avaliação da deposição de elementos potencialmente tóxicos no Canal de Bertioga (costa sudeste brasileira) ao longo de 150 anos, período principal de atividade antropogênica na área. O trabalho analisou cinco testemunhos sedimentares por meio de ICP-OES para determinar os níveis de metais (Cd, Cr, Cu, Ni, Pb e Zn) e As. O índice de carga de poluição (PLI) e o fator de enriquecimento (EF) foram calculados para identificar a toxicidade relativa dos elementos dos sedimentos e a contribuição antropogênica dos elementos investigados. Os índices indicaram a ausência de contaminação por metais pesados, mas houve uma entrada mais elevada de As nos testemunhos B2 e B5, amostrados em área com maiores taxas de sedimentação. Através de análise estatística de decomposição de séries temporais, verificou-se que o fluxo de metais para a área segue os ciclos de estações chuvosa (verão austral) e seca (inverno austral). Como conclusão pode ser verificado que o enriquecimento observado corresponde ao final do século XIX, quando o Porto de Santos foi inaugurado, e à década de 1970, quando as atividades do porto foram expandidas. Ainda, a análise dos índices e da decomposição temporal indica que a entrada de As no Canal de Bertioga dá-se por processos naturais de intemperismo e sedimentação.

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Metal concentration in sediments from the Santos estuarine system: a recent assessment

Cited by 36 publications

References 5 publications

Trace elements in an adjacent channel of an anthropized area: a case study of Baixada Santista, Southeastern Brazil

Trace elements in an adjacent channel of an anthropized area: a case study of Baixada Santista, Southeastern Brazil

Ichthyofauna as an environmental quality indicator of the Bertioga Channel, São Paulo (Brazil)

Reconstruction of historical trends in potentially toxic elements from sediment cores collected in Bertioga channel, southeastern Brazil

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