Multi-elemental contamination and historic record in sediments from the Santos-Cubatão Estuarine System, Brazil

Luiz-Silva, Wanilson; Machado, Wilson; Matos, Rosa Helena Ribeiro

doi:10.1590/s0103-50532008000800008

Cited by 47 publications

(28 citation statements)

References 16 publications

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“…The high estuarine water nutrient concentrations in Cubatão (Table ) likely contributes to the fourfold higher OC accumulation than in the undisturbed forest and sixfold higher than the global average of 163 g OC m −2 yr −1 [ Breithaupt et al , ]. The onset of urbanization at the beginning of the twentieth century and major industrial development (iron ore industry in the 1960s and fertilizer plant in the 1970s) may also play a critical role in the high accumulation rates, as noted by the large phosphorus enrichment factors during the previous century [ Luiz‐Silva et al , ; Machado et al , ]. As iron and phosphorus may be limiting to mangrove growth [ Alongi , ; Reef et al , ], the OC accumulation rates in Cubatão are likely upper limit estimates.…”

Section: Resultsmentioning

confidence: 99%

Elevated rates of organic carbon, nitrogen, and phosphorus accumulation in a highly impacted mangrove wetland

Sanders

Eyre

Santos

et al. 2014

Geophys. Res. Lett.

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121

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The effect of nutrient enrichment on mangrove sediment accretion and carbon accumulation rates is poorly understood. Here we quantify sediment accretion through radionuclide tracers to determine organic carbon (OC), total nitrogen (TN), and total phosphorus (TP) accumulation rates during the previous 60 years in both a nutrient-enriched and a pristine mangrove forest within the same geomorphological region of southeastern Brazil. The forest receiving high nutrient loads has accumulated OC, TN, and TP at rates that are fourfold, twofold, and eightfold respectively, higher than those from the undisturbed mangrove. Organic carbon and TN stable isotopes (δ 13 C and δ 15 N) reflect an increased presence of organic matter (OM) originating with either phytoplankton, benthic algae, or another allochthonous source within the more rapidly accumulated sediments of the impacted mangrove. This suggests that the accumulation rate of OM in eutrophic mangrove systems may be enhanced through the addition of autochthonous and allochthonous nonmangrove material.

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Section: Resultsmentioning

confidence: 99%

Elevated rates of organic carbon, nitrogen, and phosphorus accumulation in a highly impacted mangrove wetland

Sanders

Eyre

Santos

et al. 2014

Geophys. Res. Lett.

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121

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“…High levels of chemical contaminants are frequently reported in coastal regions, as observed in the Santos-Cubatão estuarine system, state of São Paulo, Brazil (Nizoli and Luiz-Silva 2009). Studies in this estuarine system have shown the occurrence of high concentrations of several trace elements in sediments (Luiz-Silva et al 2002, 2008. However, a few studies have focused on the bioavailability of metals at this site.…”

Section: Introductionmentioning

confidence: 99%

Seasonal AVS–SEM relationship in sediments and potential bioavailability of metals in industrialized estuary, southeastern Brazil

Nizoli

Luiz-Silva

2011

Environ Geochem Health

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In anoxic sediments, as those found in estuaries, the mobility of metals can be controlled by the formation of stable sulfide complexes. The potential bioavailability of a metal can then be predicted on the basis of the acid volatile sulfide (AVS) and simultaneously extracted metals (SEM) criterion. Distributions of AVS and SEM (Hg, Cu, Pb, Cd, Zn, and Ni) along the sediment profiles were determined seasonally for three rivers that constitute the Santos-Cubatão estuarine system (SE Brazil), which is located in one of the most industrialized areas of Latin America. AVS and SEM concentrations varied significantly, from 0.04 to 31.9 μmol g(-1) and 0.086-6.659 μmol g(-1), respectively. The highest AVS levels in sediments were detected in the winter, whereas high SEM values predominated in the summer. Considering SEM-AVS molar differences as a parameter to evaluate potential bioavailability, sediments nearest to the industrial area represent higher risk to biota, especially during the summer. It is due to relatively low AVS values and not necessarily high concentrations of metals.

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“…According to Luiz-Silva et al (2008), Cr, Cd, Pb and Zn in the region are related to steel plant-derived Fe concentrations. Relevant amounts of Zn, Pb and Cr were reported by Abessa et al (2008) in sediments from Santos Estuarine System.…”

Section: Resultsmentioning

confidence: 99%

Metals, trace elements and ecotoxicity in sediments of the Cubatão River, Brazil

Borrely

Garcia

Borrely

et al. 2024

Ecotoxicol. Environ. Contam.

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The Cubatão River is one of the most important waterways of the coast of São Paulo. The continuous discharge of domestic and industrial effluents into the river and its tributaries resulted in loss of water quality across the system. Industrial and domestic landfills are also located around the studied area. The purpose of this study was to assess two aspects of sediments from the river and two of its tributaries (Perequê and Pilões Rivers): presence of trace elements and toxic metals, and ecotoxicity. Four sampling surveys were conducted from 2010 to 2011 on six different sites (here named P0, P2, P4, P5, P7 and P8). Ecotoxicity was assessed by exposing Hyalella azteca to the collected sediments. Instrumental Neutron Activation Analysis (INAA) and Atomic Absorption Spectrometry (GF AAS and CV AAS) techniques were applied for measuring concentration of metals and trace elements. The latter enabled quantification of Cd, Pb and Hg, while the former enabled quantification of a wide range of metals and trace elements. As, Cr and Zn concentrations obtained by INAA as well as AAS results were compared to threshold effect levels (TEL) and probable effect levels (PEL), the sediment quality guidelines proposed by the Canadian Council of Ministers of the Environment (CCME) for evaluating the potential effects on aquatic organisms. Cd and Hg values did not exceed TEL at the most of samples. Pb exceeded TEL at only one site campaign. As, Cr and Zn values exceeded TEL in most of sampling sites, with P2 and P4 showing the highest concentrations. Enrichment Factor (EF) and Geoaccumulation Index (IGeo) were calculated for the elements determined by INAA using North American Shale Composite (NASC) and regional background values. In short, As, Br, Cr, Hf, Pb, Sb and Zn were the elements found in concerning amounts, especially As, Br, Cr and Zn. Toxicity results revealed toxic effects on sediments from P2 and P5 (mortality > 50%). Body size analysis demonstrated negative effects at P4 (length smaller than 2,500.00 µm). Data crossing analyses indicate As and Br as main possible contributors to high toxicity levels.

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Multi-elemental contamination and historic record in sediments from the Santos-Cubatão Estuarine System, Brazil

Cited by 47 publications

References 16 publications

Elevated rates of organic carbon, nitrogen, and phosphorus accumulation in a highly impacted mangrove wetland

Elevated rates of organic carbon, nitrogen, and phosphorus accumulation in a highly impacted mangrove wetland

Seasonal AVS–SEM relationship in sediments and potential bioavailability of metals in industrialized estuary, southeastern Brazil

Metals, trace elements and ecotoxicity in sediments of the Cubatão River, Brazil

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