Data/hora: 09/06/2024 18:44:43

Biblioteca(s): | Embrapa Pantanal.
Data corrente: | 06/06/2000
Data da última atualização: | 31/03/2017
Autoria: | GODOY, J. M.; GUIMARAES, J. R. D.; PADOVANI, C. R.; PEREIRA, J. C. A.; VIEIRA, L. M.; CARVALHO, Z. L.; GALDINO, S.
Afiliação: | CNEN.Instituto de Radioprotecao e Dosemetria (Rio de Janeiro, RJ). PUC.Departamento de Quimica (Rio de Janeiro, RJ). UFRJ.Instituto de Biofisica (Rio de Janeiro, RJ). EMBRAPA Pantanal (Corumba, MS).
Título: | Mercury levels on sediment cores from a non gold mining area of the Brazilian Pantanal.
Ano de publicação: | 1999
Fonte/Imprenta: | In: INTERNATIONAL SYMPOSIUM ENVIRONMENTAL GEOCHEMISTRY IN TROPICAL COUNTRIES, 3., 1999, Nova Friburgo. Book Abstracts.
Idioma: | Inglês
Conteúdo: | The mercury concentration was determined on two sediment cores taken from floodplain lakes from the Taquari River, Mato Grosso do Sul. The lakes studied during this work were located close to the city of Coxim, in the coordinates 18º 24' 10"S and 54º 58' 46"W (Lake 1) and 18º 21' 57"S and 54º 59' 38"W (Lake 2). The sediment cores were taken using a gravity corer and P^VC tubes. They were cut into 2 cm slices, and the central part of each slice was reserved for mercury determination. The Pb-210 technique was used for sediment dating and determination of mass sedimentation rates. Mercury was analyzed by cold vapor atomic absorption spectrometry. Both cores have shown a similar pattern with mercury concentrations between 20 and 80 ug.g-1 for Lake 1 and 13 and 60 ug.g-1 for Lake 2. The mercury concentrations are approximately constant until 1940 and lower than present values by a factor of two.
Palavras-Chave: | Brasil; Gold mining; Mineracao de ouro; Sediment.
Thesagro: | Mercúrio; Sedimento.
Thesaurus Nal: | Brazil; mercury; Pantanal.
Categoria do assunto: | --
Registro original: | Embrapa Pantanal (CPAP)
Exemplares: | CPAP - (43920-1) - UPC - SP - PP - SP16162 -  - 16162 - DIS