Behaviour of heavy metals in the estuarine area of the Capibaribe River in the Northeast of Brazil

Brayner, F. M. M.; Barbosa, Alexandre Muselli; Silva, H.K. Phillipini da; Melo, L. Vieira de

doi:10.1051/jp4:20030283

Cited by 3 publications

(5 citation statements)

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“…The influence of the estuary water in this coastal area was observed by some authors between them Bryner et al (2003); Guenther et al (2015); Maciel et al (2015); Travassos et al (2016);and Martins et al (2016), whose studied some pollution markers introduced by the urbanized and industrialized Capibaribe rivers. This study showed that the behavior and association of the components of silicon cycle can corroborate these river inputs and to evidence coastal biogeochemical and physical processes on this coastal zone with emphasis to testimony of primary production actors contribution.…”

Section: T (°C)mentioning

confidence: 88%

Different silicon forms sinalize an input of urbanized river and indicate the presence of phytoplankton with silicon structures in the tropical coastal area of Recife (PE-Brazil)

Bastos

Braga

2018

Braz. j. oceanogr.

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The urbanized areas mark its presence in the hydrological systems with some biogeochemical signs including silicon inputs. Natural influence of leaching and erosion is done by silicate contribution and sometimes, the agriculturally soil contains microphytoliths and contributes with biogenic silica. Once in the hydrological system, the silicon can integrate the biogeochemical cycles showing a balance or not between inorganic and biological forms that reveals a tendency of processes that occur in each sector of the estuarine-marine interface. This study aims to evaluate the impact of a heavily polluted/urbanized river, whose input can be evidenced by the contribution of different forms of silicon that can evidence the terrestrial contribution, erosion process, the presence of phytoplankton species with siliceous structures, mainly associated to diatoms and also, to study the river plume spreading on the coastal area by undertaking silicon profiles in the region adjacent to the river mouth. The coastal region of Recife is under influence of fluvial inputs from Capibaribe and Beberibe rivers verified by observed low salinity (min. 33.93). The distribution of silicon forms showed sectorial variation, and the maximum values were dissimilar. Dissolved silicate reached 14.40 µmol L-1, lithogenic silicon (LSi) maximum of 25.76 µmol L-1 and biogenic silica (BSi) reaching 7.39 µmol L-1 near the river mouth toward the sea, evidencing the river influence coming from the west, achieving the port barrier at the end and propagating in the sea toward northeast. Due to higher nutrient availability in the stations nearest to the coast, primary production was encouraged with evidencing by high values of chlorophyll-a associated to silicate (r=0.71) and to BSi (r=0.44). In the stations more distant to the coast, the forms of silicon showed very low concentrations and BSi/Chlorophyll-a showed negative correlation associated with chlorophyll-a concentrations evidencing the participation of non-silicon actors in the primary production in medium depth in oligotrophic tropical waters.

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Section: T (°C)mentioning

confidence: 88%

Different silicon forms sinalize an input of urbanized river and indicate the presence of phytoplankton with silicon structures in the tropical coastal area of Recife (PE-Brazil)

Bastos

Braga

2018

Braz. j. oceanogr.

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“…44,45 The common presence of illite (KxAl 2 [Si 4-x Al x O 10 ](OH) 2 ), which is also a detrital mineral, may be due to its stability in alkaline water sediments, which indicates direct and mechanical alterations. 46 Although these two clay minerals are generally deposited in the upper portion of estuaries as a result of salinity variations, [47][48][49] such as in Guanabara Bay (Rio de Janeiro state; RJ), 50 the Huelva estuary on the Spanish coast, 51 the Capibaribe River (Pernambuco state; PE) 52 and the Curimataú estuary (Rio Grande do Norte state; RN) 6 , their effective transport and dispersion in association with the SPM in the lower estuary should be considered.…”

Section: Resultsmentioning

confidence: 99%

Geoquímica do material particulado em suspensão em um sistema estuarino tropical, sudeste do Brasil

Monteiro¹,

Sá²,

Neto³

2017

Quim. Nova

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The aim of this study is to assess the variation of the geochemistry of suspended particulate matter (SPM) in the tropical estuarine system composed of the adjacent Piraquê-Açu and Piraquê-Mirim (ES) rivers using SPM sampled with sediment traps (45 µm mesh) installed in the drainage channels. We collected SPM during different tidal stages and seasonal periods and analysed the metals using inductively coupled plasma mass spectrometry according to EPA 3051A, the mineralogy using X-ray diffraction, the particle size using laser ray diffraction, and organic matter (OM) using calcination. The traps collected enough SPM to perform analyses for each sampling period. The SPM consists of silt size particles, and the percentage of OM is between 20 and 40%. The particles are dominated by kaolinite and quartz, and gibbsite, haematite, goethite, and pyrite are also present. These materials are found in the Barreiras Formation, through which the drainage system cuts. The metal concentrations were higher in the summer: Al (3208.32 g kg ). The Piraquê-Açu River had higher metal concentrations than the Piraquê-Mirim River, and the geochemical indices of both rivers indicate that they naturally contribute to the estuarine system of the Piraquê-Açu and Piraquê-Mirim rivers (SEPAPM). However, anthropic interferences influence these indices at the confluence of the two channels.Keywords: sediment trap; metals; mineralogy; Piraquê-Açu. INTRODUCTIONEstuaries are transitional environments that act as biogeochemical filters that retain dissolved and particulate material, including pollutants.1-4 Because they are largely influenced by hydrodynamic processes (waves, currents, and tides), estuaries distribute these elements and determine whether the system is a retainer or an exporter.5 Several studies have addressed the chemical composition and transport of suspended particulate matter (SPM; ≥ 0.45 µm) from estuarine regions to the adjacent coastal zones, mainly to quantify the continental contribution to the oceans. [6][7][8][9][10][11] However, few studies have been conducted in estuaries located in small and medium river basins in tropical regions, especially in those where human impacts are not yet evident. Understanding the geochemistry of SPM and the processes that influence it in estuarine systems has become a challenge when considering conditioning parameters such as rainfall, river discharge, the concentrations of major and trace elements and the physicochemical variables that may modify the geochemical behaviour of the SPM.To address these issues, the estuarine system of the Piraquê-Açu and Piraquê-Mirim rivers (SEPAPM) was studied to 1) evaluate if the geochemistry of the SPM of these two adjacent fluvial channels with different drainages varies 12,13 and 2) test if a sediment trap can be used to collect SPM considering the difficulty of sampling SPM with conventional methods, which require filtering many litres of water to acquire sufficient material for the geochemical analysis. Study areaThe SEPAPM is located in the municipa...

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“…In this study, the results obtained by Brayner et al [5] in the analysis of samples collected in a preserved mangrove area, and the same characteristics being found in studied sediments, was used as background.…”

Section: Discussionmentioning

confidence: 99%

“…The mineralogical analysis of sediment samples collected along the Capibaribe estuary reveals the presence of kaolinite, ilite and feldspar group as well as quartz and hematite [5]. Sampling sites in the Capibaribe estuary, Recife (PE).…”

Section: Studied Areamentioning

confidence: 99%

“…Most wastewaters of Recife City are discharged into this estuary. As a result of these anthropogenic inputs this estuarine area is negatively affected by contaminants and the water is listed as impaired [5]. Despite the environmental degradation of the Capibaribe estuary, the relative contributions of specific contaminant sources to the impairments are usually unknown.…”

Section: Introductionmentioning

confidence: 99%

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Heavy metal concentrations in sediments of the Capibaribe River Estuary in the Metropolitan Region of Recife, Pernambuco-Brazil

Macêdo¹,

Silva²,

Brayner³

et al. 2007

WIT Transactions on Ecology and the Environment, Vol 102

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The objective of this research was to assess the heavy metal concentration in sediments from the Capibaribe river estuary located in Recife City (Pernambuco, Brazil). Sampling was carried out in the rainy and dry seasons in six fixed stations along the river estuary during the rainy/2002 and dry/2003 seasons. Superficial sediment samples were collected between 0 -10 cm deep, during low tide. 14 traps were also used and the settled sediment collected 24 hours later. Dissolved oxygen, pH, salinity, temperature and water transparency data were obtained in the same stations. To quantify cadmium, cobalt, copper, chromium, iron, lead, manganese, nickel and zinc metals an Atomic Emission Spectrometer with Inductive Coupled Plasma (ICP-AES) method was used. No cobalt, lead or nickel were detected, all of them below the quantifying limit. The obtained results to both sediments and sedimentary material showed concentration levels above "background" indicating a high level of contamination in the study area. The pH, salinity, temperature and water transparency parameters results are as expected to estuarine areas. The dissolved oxygen content indicated that pollution is threatening the water quality in the area studied.

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Behaviour of heavy metals in the estuarine area of the Capibaribe River in the Northeast of Brazil

Cited by 3 publications

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Different silicon forms sinalize an input of urbanized river and indicate the presence of phytoplankton with silicon structures in the tropical coastal area of Recife (PE-Brazil)

Different silicon forms sinalize an input of urbanized river and indicate the presence of phytoplankton with silicon structures in the tropical coastal area of Recife (PE-Brazil)

Geoquímica do material particulado em suspensão em um sistema estuarino tropical, sudeste do Brasil

Heavy metal concentrations in sediments of the Capibaribe River Estuary in the Metropolitan Region of Recife, Pernambuco-Brazil

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