Contamination of port zone sediments by metals from Large Marine Ecosystems of Brazil

Buruaem, Lucas M.; Hortellani, Marcos Antonio; Sarkis, J.E.S.; Costa-Lotufo, Letı́cia V.; Abessa, Denis Moledo de Souza

doi:10.1016/j.marpolbul.2012.01.017

Cited by 100 publications

(60 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…23 The metal recovery was > 80%, an indicative of a satisfactory method, except for elements Cr ((1)-56.7%, (2)-48.9%) and Al ((1)-38.4%, (2)-51.1%). These results are in agreement with other studies 24,25 and compliant with validation data presented by the method 3051A for Buffalo River sediment.…”

Section: Resultssupporting

confidence: 93%

“…26 Our group intent was not to completely decompose the samples but nearly get a total digestion of the samples in order to obtain the elements that are associated with the adsorbed, exchangeable, oxidizable and reduced geochemical fractions and that can be considered anthropogenic in origin. 25 The limits of detection for these metals were obtained based in a mean of determinations of seven blank preparations ( -X) plus t times the standard deviation determined by these seven preparations of the blanks (LOD = -X + ts) were t = 3.143 value of student's t test for p = 0.05 and six degrees of freedom (n -1). The limit of determination was obtained by an equation (LOQ = -X + 5s).…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Assessment of metal concentration in the Billings Reservoir sediments, São Paulo State, Southeastern Brazil

Hortellani

Sarkis

Menezes

et al. 2013

J. Braz. Chem. Soc.

Self Cite

View full text Add to dashboard Cite

A contaminação por metais em 47 amostras de sedimentos (fração < 63 µm) coletadas em 13 pontos de pesca no reservatório Billings foi avaliada utilizando quatro metodologias: normas de qualidade de sedimentos (SQG S ), índice de geoacumulação (I Geo ), índice de poluição metálica (MPI) e análises estatísticas. Somente Fe e Co parecem estar associados com a composição natural do sedimento ou processos de intemperismo natural, enquanto Al, Cd, Cr, Cu, Hg, Mn, Ni, Pb, and Zn mostraram aumento em suas concentrações, sugerindo associação com fontes antropogênicas. MPI identificou as áreas mais críticas em relação à concentração total de metais enquanto I Geo identificou o metal específico para cada área. A sazonalidade sobre os níveis dos metais foi avaliada usando análise de variância (ANOVA) e gráfico de caixa. Somente o gráfico de caixa sugeriu um pequeno aumento na contaminação por Hg and Pb durante o período com muita chuva e também indicou altas concentrações de Cu e Zn em um dos pontos analisados com a incidência de valores fora do normal e extremos. Portanto, políticas ambientais devem ser adotadas para reduzir a contaminação por metais.Four approaches were applied to evaluate the metal contamination in 47 sediment samples (< 63 µm fraction) collected at 13 fishing points of the Billings Reservoir: sediment quality guidelines (SQGs), geoaccumulation index (I Geo ), metal pollution index (MPI) and statistical analyses. Only Fe and Co concentrations seemed to be associated with crustal material or natural weathering processes, while Al, Cd, Cr, Cu, Hg, Mn, Ni, Pb and Zn showed increases in their concentrations, which seemed to be associated with anthropogenic sources. MPI identified the most critical sites in relation to the total metal accumulation while I Geo identified the specific metal accumulation for each site. Analysis of variance (ANOVA) and box plot method were performed to evaluate seasonal effects on the metal levels. Only box plot suggested a slight increase in Hg and Pb contamination during heavy rainy periods and also indicated high concentrations of Cu and Zn in one of the analyzed point, with incidence of outliers and extreme values. Thus, an environmental policy in order to reduce these metal contaminations must be adopted.

show abstract

Section: Resultssupporting

confidence: 93%

Section: Resultsmentioning

confidence: 99%

Assessment of metal concentration in the Billings Reservoir sediments, São Paulo State, Southeastern Brazil

Hortellani

Sarkis

Menezes

et al. 2013

J. Braz. Chem. Soc.

Self Cite

View full text Add to dashboard Cite

show abstract

“…Port activities are often associated with aquatic pollution and the spreading of contaminants through different compartments, such as water, sediments and biota. Special attention must be given to sediments, which frequently present higher concentrations of contaminants compared to the water column, and may constitute not only a sink but also a secondary source of contaminants for the water column and biota (Buruaem et al, 2012). Benthic organisms, in particular, due to their limited mobility, are exposed to accumulated contaminants and respond to stress conditions both at individual and community level through the selection of taxa, the elimination of sensitive ones and abundance changes (Solis-Weiss et al, 2004).…”

Section: Introductionmentioning

confidence: 99%

The Port of Trieste (Northern Adriatic Sea)—A Case Study of the “Ecosystem Approach to Management”

et al. 2017

View full text Add to dashboard Cite

This study is a rare example of "the ecosystem approach to management" that has been carried out for the purpose of providing practical support to decision-makers in managing a Site of National Interest (SIN) where activities such as fishing, aquaculture and swimming are restricted. Benthic ecosystem functioning was assessed to verify whether it would be possible to exclude the less contaminated part from the SIN and its legislative constraints. At five macrosites subjected to diversified industrialization and anthropization, we evaluated the structural characteristics of the sediments, both heterotrophic and phototrophic communities, and the main processes of production, transformation and consumption of organic matter at seven stations, plus a reference site. Along the north-eastern boundary of the bay, the port, shipbuilding and iron foundry areas, characterized by high levels of contaminants, low macrozoobenthic diversity, major organic contents (up to 51.1 mgC g −1 ) and higher numbers of hydrocarbon degrading bacteria (up to 5,464 MPN g dry −1 ), differed significantly (R ANOSIM = 0.463, p = 2.9%) from the other areas (stations). Oxygen consumption (−15.22 ± 1.59 mgC m −2 ) prevailed over primary production and the trophic state was net heterotrophic. In contrast, on the other side of the harbor (residential area/center bay), contamination levels were below the legal limits and both the microalgal and macrobenthic communities displayed higher biodiversity. Higher macrofaunal abundances (up to 753 ± 174.7 ind.m −2 ), primary production rates (up to 58.60 ± 8.41 mgC m −2 ) and exoenzymatic activities were estimated. nMDS and SIMPROF analyses performed on benthic communities significantly separated the most contaminated stations from the other ones. Overall, by applying this holistic approach, a better environmental situation was highlighted along the southern boundary of the bay and according to these results this part of the bay could be excluded from the SIN. However, further sampling is required along a finer sampling grid in the less contaminated side of the port in order to confirm these first results. Our work is one of the first case studies where such an ecosystem approach has been applied to a port area, in order to provide practical support to decision-makers involved in the spatial planning of harbor zones.

show abstract

“…Assessments of environmental risks associated with metal contamination in these areas can involve the use of sediment resuspension experiments combined with extraction techniques that allow metal bioavailability estimation (Caetano et al 2003;Machado et al 2011). Studies comparing strong chemical extraction data with sediment quality guidelines (SQGs) have been frequently done in sediments from dredging areas (HuertaDiaz et al 2008;Buruaem et al 2012). However, the use of resuspension experiments can improve results and be a useful tool for the management of dredging sediments.…”

Section: Introductionmentioning

confidence: 99%

Changes in Cd and Zn bioavailability upon an experimental resuspension of highly contaminated coastal sediments from a tropical estuary

Monte

Rodrigues

Cordeiro

et al. 2015

Sustain. Water Resour. Manag.

View full text Add to dashboard Cite

Bioavailability evaluations can be an important tool to determine the quality of dredging sediments. Sequential extractions are commonly used to assess the different chemical forms of trace metals in coastal sediments; however, sometimes they are expensive and timeconsuming. Additionally, these analyses do not represent possible changes due to resuspension during and after dredging activity. Newer, easier options to evaluate bioavailability are necessary to understand and preview bioavailability changes resulting from trace metals in dredging and disposal areas. This study aims to evaluate changes in Cd and Zn bioavailability due to sediment resuspension in a highly contaminated area in Sepetiba Bay, Brazil. Twelve surface sediment samples from this location were submitted to a resuspension experiment during two different time intervals (1 and 24 h). The extraction of potentially bioavailable (1 mol L -1 HCl-extractable) fractions and strongly bound (concentrated HNO 3 -extractable) fractions were sequentially carried out. More than 50 % of the concentrations were in potentially bioavailable fractions. Bioavailability change indexes were proposed; these were estimated as relative changes in bioavailability percentage after resuspension. However, two of these stations presented increases in the Cd and Zn HCl-extractable fractions after sediment resuspension above effects range low and effects range medium National Oceanic and Atmospheric Administration which are the same limits adopted for Brazilian environmental jurisdiction. Positive correlation of Zn and Cd with TOC in strongly bound fractions evidenced the importance of organic matter binding to preserve metals in this fraction. Fe and Mn partitioning was a major geochemical control on bioavailability of Cd and Zn upon short-time resuspension periods.

show abstract

Contamination of port zone sediments by metals from Large Marine Ecosystems of Brazil

Cited by 100 publications

References 37 publications

Assessment of metal concentration in the Billings Reservoir sediments, São Paulo State, Southeastern Brazil

Assessment of metal concentration in the Billings Reservoir sediments, São Paulo State, Southeastern Brazil

The Port of Trieste (Northern Adriatic Sea)—A Case Study of the “Ecosystem Approach to Management”

Changes in Cd and Zn bioavailability upon an experimental resuspension of highly contaminated coastal sediments from a tropical estuary

Contact Info

Product

Resources

About