Carbon influence on metal distribution in sediment of Amazonian macrotidal estuaries of northeastern Brazil

Santos, Thays Thayanne Luz; Marins, Rozane Valente; Dias, Francisco

doi:10.1007/s10661-019-7626-6

Cited by 8 publications

(13 citation statements)

References 38 publications

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“…Such differences may be due to the sampling year, sampling stations, and/or the methodologies used. The metal concentrations found for sediments from the Tarumã-Açu stream were much lower than those reported in all the studies cited above [44][45][46][47].…”

Section: Discussioncontrasting

confidence: 68%

“…Compared with the polluted and eutrophic Rodrigo de Freitas Lagoon [46], the Mindu and Quarenta streams presented slightly lower concentrations for most metals. Only the metals Mn and Pb were found in much lower concentrations herein compared to all of the systems cited [23,[44][45][46]. The Quarenta and Mindu streams also presented slightly lower concentrations for most metals than those reported for the Xingu and Fresco rivers [22] and the Furo da Laura estuary [24], which are Amazonian waterbodies located in the Pará state.…”

Section: Discussionmentioning

confidence: 49%

“…Compared with sediments of black and whitewater rivers within the Itacoatiara city (AM), Central Amazon, metal concentrations were higher for sediments of the Mindu and Quarenta streams [23]. Compared with estuarine environments, such as the Itajaí-Açu estuarine system (SC) [44] and the São Marcos bay and Anil river estuary (MA) [45], sediments from the Mindu and Quarenta streams presented a comparable concentration for most metals. It is important to mention that those both estuarine systems are also port regions [44,45].…”

Section: Discussionmentioning

confidence: 99%

“…Compared with estuarine environments, such as the Itajaí-Açu estuarine system (SC) [44] and the São Marcos bay and Anil river estuary (MA) [45], sediments from the Mindu and Quarenta streams presented a comparable concentration for most metals. It is important to mention that those both estuarine systems are also port regions [44,45]. Compared with the polluted and eutrophic Rodrigo de Freitas Lagoon [46], the Mindu and Quarenta streams presented slightly lower concentrations for most metals.…”

Section: Discussionmentioning

confidence: 99%

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Metals, n-Alkanes, Hopanes, and Polycyclic Aromatic Hydrocarbon in Sediments from Three Amazonian Streams Crossing Manaus (Brazil)

et al. 2020

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Pollution is increasing in the Amazon region and its real impact is still unclear. Since this region is of great interest to the global community, this study aimed to assess geochemical biomarkers and metals in sediments from three streams crossing Manaus, a Brazilian city of 2.1 million inhabitants located in the heart of the Amazon rainforest. The Mindu and Quarenta streams criss-cross the urban area of Manaus and receive domestic effluents from many heavily populated districts. In addition, the Quarenta stream is subjected to effluents from the industrial district of Manaus. The Tarumã-Açu stream is mostly covered by vegetation, although the region presents some occurrence of family farming, floating petrol station, marinas, and floating restaurants and bars. n-Alkanes were determined by Gas Chromatography with Flame Ionization Detection (GC-FID), whereas hopanes and polycyclic aromatic hydrocarbons (PAHs) were determined by Gas Chromatography coupled to Mass Spectrometry (GC-MS). The metals Ag, Cd, Cr, Co, Cu, Mn, Ni, Pb, and Zn were determined by Inductively Coupled Plasma Optical Emission Spectroscopy (ICP-OES) after microwave-assisted acid digestion. Concentrations of total PAHs and metals were higher in sediments from the urban streams Mindu and Quarenta because of the occurrence of more intense and diverse sources of pollution. In addition, some sediment samples from both these streams presented concentrations of fluoranthene, phenanthrene, and metals higher than the limits of low probability of adverse effects on biota established by the international guideline and by the Brazilian legislation. A similar total n-alkane concentration for sediments from all streams associated with profiles of n-alkanes with no odd/even hydrocarbon predominance suggests that biomass burning is an important source of hydrocarbons. Petroleum-derived products also represented a source for n-alkanes, as confirmed by the presence of α,β-hopanes, including an α,β-homohopane series from C31 to C35 with the presence of both 22S and 22R epimers. This is the first report on n-alkanes, PAHs, and hopanes in sediments from the Mindu, Quarenta, and Tarumã-Açu streams. The concentrations reported herein may be considered as baseline data in future monitoring programs of these streams.

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Section: Discussioncontrasting

confidence: 68%

Section: Discussionmentioning

confidence: 49%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Metals, n-Alkanes, Hopanes, and Polycyclic Aromatic Hydrocarbon in Sediments from Three Amazonian Streams Crossing Manaus (Brazil)

et al. 2020

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“…The Anil River Estuary (ARE) is located in a largely urban area (65.2% of the sub-basin) and has a population of 250 thousand residents along its drainage basin, of the metropolitan region of São Luís, capital of the state of Maranhão, Brazil. The ARE is characterized by deforestation and the filling of mangroves for the construction of shanties as well as the discharge of domestic and hospital waste (Santos et al, 2019). Studies aimed at understanding the dynamics of physical, chemical, and sedimentary variables make an important contribution to knowledge on estuarine systems and variations in these systems in terms of the distribution of sedimentary and physical characteristics (Serejo et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Distribution of physical and chemical variables in the water column and characterization of the bottom sediment in a macrotidal estuary on the Amazon coast of the state of Maranhão, Brazil

Machado¹,

Eschrique²,

Lima³

et al. 2022

Rev. ambiente água

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The objective of this research was to characterize the distribution of dissolved nutrients at six sampling stations in the estuary of the Anil River (ARE) and characterize the bottom sediment. The study area is influenced by a tropical climate and semidiurnal macrotidal regime. Sampling of the surface water and sediment was performed in the main channel at six sampling stations distributed along the estuary in the rainy period (May 9th) and dry period (October 5th) during the spring. Physical variables were collected with the aid of a HANNA HI-8424 multi-parameter probe (water temperature, salinity, pH, dissolved oxygen, and turbidity) and YSI CTD (conductivity, temperature, and depth) probe. A van Veen dredge was used for the collection of bottom sediment from the main channel. The sedimentological results were heterogeneous. Grain size ranged from very fine to medium sand. Dissolved nutrients in the ARE had different sources depending on the season. Continental and fluvial inputs, evidenced by salinity values, governed the distribution of nutrients in the rainy period (January to June), whereas nutrient concentrations were related to the recycling of organic material in the estuary in the dry season (July to December). The considerable presence of sand in the main channel indicates that the sediments available in ARE are exposed to intense hydrodynamics. The distribution of nutrients and the grain size revealed the occurrence of different sources in the estuary according to the rainfall regime and the intense hydrodynamics of tidal currents (semidiurnal macrotidal). Keywords: dissolved nutrients, estuarine environment, sedimentology.

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Evaluation of metal contamination in surface sediments and macroalgae in mangrove and port complex ecosystems on the Brazilian equatorial margin

Corrêa

Cutrim

Cruz

2023

Environ Monit Assess

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Carbon influence on metal distribution in sediment of Amazonian macrotidal estuaries of northeastern Brazil

Cited by 8 publications

References 38 publications

Metals, n-Alkanes, Hopanes, and Polycyclic Aromatic Hydrocarbon in Sediments from Three Amazonian Streams Crossing Manaus (Brazil)

Metals, n-Alkanes, Hopanes, and Polycyclic Aromatic Hydrocarbon in Sediments from Three Amazonian Streams Crossing Manaus (Brazil)

Distribution of physical and chemical variables in the water column and characterization of the bottom sediment in a macrotidal estuary on the Amazon coast of the state of Maranhão, Brazil

Evaluation of metal contamination in surface sediments and macroalgae in mangrove and port complex ecosystems on the Brazilian equatorial margin

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