MERCURY DISTRIBUTION IN SEDIMENTS OF A SHALLOW TROPICAL RESERVOIR IN BRAZIL

Authors

  • Vinicius Andrade Souza Programa de Pós-Graduação em Geoquímica da Universidade Federal Fluminense
  • Julio Cesar Wasserman Departamento de Análise Geoambiental, Universidade Federal Fluminense

Abstract

Mercury is a toxic element that is globally distributed in contamina-ted areas, as well as remote environments. In the case of the Juturnaíba  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 Juturnaíba 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 Juturnaíba 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 São João 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.

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Author Biographies

Vinicius Andrade Souza, Programa de Pós-Graduação em Geoquímica da Universidade Federal Fluminense

Biólogo com conhecimento em ornitologia. Experiência com pesquisas nas áreas de Meio Ambiente e Saúde Pública junto a Fundação Oswaldo Cruz e com analise de metais em sedimentos e água na UFF.

Julio Cesar Wasserman, Departamento de Análise Geoambiental, Universidade Federal Fluminense

Oceanógrafo na Universidade do Estado do Rio de Janeiro (1985), o pesquisador concluiu o doutorado em Oceanografia Química pela Université de Bordeaux I (França) em 1990 e um Pós-doutorado em Química Ambiental na Université de Pau et des Pays de lAdour (FRança) em 1999. Atualmente é Professor Associado da Universidade Federal Fluminense e Coordenador da Rede UFF de Meio Ambiente e Desenvolvimento Sustentável, onde tem trabalhado com pesquisa aplicada a problemas ambientais. No escopo da REMADS-UFF tem coordenado equipes para realizar estudos de impacto ambiental, monitoramentos ambientais, e tem atuado junto a empresas e sociedade civil, buscando novas tecnologias para a solução de impactos ambientais e sustentabilidade. Publicou 65 artigos em periódicos especializados e 166 trabalhos em anais de eventos. Possui 17 capítulos de livros e 4 livros editados. Possui 1 produto tecnológico registrado. Orientou 23 dissertações de mestrado e 6 teses de doutorado, além de ter orientado 24 trabalhos de iniciação científica. Atua na área de Oceanografia Química, Química de Poluentes, Gestão Ambiental e Gerenciamento Costeiro. Tem larga experiência na dinâmica de metais pesados, mas também vem estudando outros tipos de poluentes aquáticos, atmosféricos e de solos. Desde o final dos anos 1990, vem trabalhando com gestão ambiental em uma perspectiva interdisciplinar, interagindo com pesquisadores de diversas áreas, incluindo médicos, engenheiros, geógrafos e sociólogos.

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Published

2015-02-27

How to Cite

Souza, V. A., & Wasserman, J. C. (2015). MERCURY DISTRIBUTION IN SEDIMENTS OF A SHALLOW TROPICAL RESERVOIR IN BRAZIL. Geochimica Brasiliensis, 28(2), 149. Retrieved from https://geobrasiliensis.org.br/geobrasiliensis/article/view/399

Issue

Vol. 28 No. 2 (2014)

Section

Articles

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