Contamination from an affluent of Furnas reservoir by trace metals

Cavalcanti, P P; Rodrigues, L C A; Beijo, Luiz Alberto; Barbosa, Sandro; Xavier, Tania; Magalhães, Francis Stefano de

doi:10.1590/1519-6984.07013

Cited by 6 publications

(2 citation statements)

References 19 publications

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“…Chemicals are known as important agents of global change (Bernhardt et al, 2017). Industrial development and urbanization release a variety of pollutants into the environment, with still unknown consequences to organisms (Förstner & Wittmann, 1983;Filser, 2008;Cavalcanti et al, 2014). The urbanization process usually results in changes in land cover, soil erosion, and waste production, which leads to a chemical load on the surrounding water bodies, altering the ecosystem and leaving records of disturbances in the sediments (Förstner & Wittmann, 1983).…”

Section: Sediments As a Secondary Source Of Pollutantsmentioning

confidence: 99%

The role of sediments in the carbon and pollutant cycles in aquatic ecosystems

et al. 2019

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Aim Anthropogenic modifications in the landscape are accelerating biogeochemical cycles and causing unbalances in terrestrial and aquatic ecosystems with still unknow impacts on biotic and abiotic processes. Therefore, there has been increasing scientific interest in the links between human activities and ecosystems functions. Methods Here we review the role of aquatic sediments in the carbon and pollutant cycle. Results We briefly explore the historical context, origin, and composition of the sediments, as well as the factors that influence the processes of carbon and contaminants cycling and the role of sediments in the greenhouse gases emissions in aquatic ecosystems. Conclusions Aquatic sediments can help to understand the terrestrial and aquatic ecosystem changes, once they are good sentinels, reflecting key biogeochemical processes over time.

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Section: Sediments As a Secondary Source Of Pollutantsmentioning

confidence: 99%

The role of sediments in the carbon and pollutant cycles in aquatic ecosystems

et al. 2019

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“…The large expansion of big cities results in environmental impacts on local water resources, which often serve as a source of water for the same populations (Cavalcanti et al, 2014). Trace metals entering aquatic ecosystems through runoff or atmospheric deposition and eventually accumulate in sediments (Bing et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

The historical influence of tributaries on the water and sediment of Jacuí’s Delta, Southern Brazil

Andrade¹,

Andrade²,

Camargo³

2018

Rev. ambiente água

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The high population density in a metropolis leads to socio-environmental impacts that directly affect local water resources. This work evaluated the historical data (between 2000 and 2014) of water and sediment monitoring in the Jacuí’s Delta region and analyzed the relationship between these sites. Seven monitoring sites around the Jacuí's Delta were evaluated: the outflow of the rivers Jacuí, Caí, Sinos, and Gravataí; the channels Ilha da Pintada and Navegantes; and Lake Guaíba. Water data were evaluated for: air and water temperature; depth; pH; electrical conductivity; transparency; turbidity; dissolved oxygen; biochemical oxygen demand; phosphorus; nitrogen; total residues; and escherichia coli. Sediment were evaluated for pseudo-total concentrations of metals (Al, Fe, Ca, Mn, Ba, V, Zn, Cu, Pb, Cr, Ni, Co, Li, Be, Cd, Hg, As, and Ag). The quality of water and sediment in the Jacuí's Delta are linked with the tributaries and priority flows of the channels. The historical data of water and sediment around the Jacuí's Delta shows the influence of the tributaries with low quality in the downstream points. The pollution of the rivers Caí, Sinos, and Gravataí negatively affects the environmental quality of the channel Navegantes and Lake Guaíba (catchment points to water supply). The water in those sites presents reductions in dissolved oxygen and high values of coliforms, and the sediment shows high concentrations of metal Zn, Pb, Cr, and Hg. Despite the reduction in Pb and Hg values in the sediment over the past years, pollution from the tributary rivers still persists.

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