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• W2019820009 abstract "Mercury is a toxic element that is globally distributed in contamina-ted areas, as well as remote environments. In the case of the Juturnaiba  Lake (State of Rio de Janeiro, Southeastern Brazil), part of the landscape was flooded after the construction of a dam, favoring the development of anoxic conditions, reducing the redox potential within the sediments and modifying the geochemical conditions. The understanding of the pollutants behavior in the Juturnaiba is necessary, because the system is a multi purpose environment that is used for water supply, agricultural irrigation, leisure and fishing. In the present study, we evaluated the mercury distribution of superficial sediments of the Juturnaiba reservoir that was interpreted in the light of granulometry and concentrations of carbon and nitrogen. Thirty-two surface sediment samples were collected in March 2011 in order to carry out the total mercury analyses with Cold Vapor Atomic Absorption Spectrophotometry (CV-AAS). The distribution map indicates that the highest mercury values (211 ng/g) are associated with the presence of the aquatic macrophytes banks. The lowest values (58 ng/g) were observed in the Northern portion, associated with the inputs of the Sao Joao River that drains a better preserved area. It is necessary to underline that the highest concentrations occur in an area of significant macrophyte production, where methylation process may be more significant, constituting a threat for humans and the environment." @default.
• W2019820009 created "2016-06-24" @default.
• W2019820009 creator A5015087660 @default.
• W2019820009 creator A5078668356 @default.
• W2019820009 date "2014-12-01" @default.
• W2019820009 modified "2023-10-18" @default.
• W2019820009 title "MERCURY DISTRIBUTION IN SEDIMENTS OF A SHALLOW TROPICAL RESERVOIR IN BRAZIL" @default.
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• W2019820009 doi "https://doi.org/10.21715/gb.v28i2.399" @default.
• W2019820009 hasPublicationYear "2014" @default.
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