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	Provedor de dados Organic Eprints (1) Ciências Agrárias (1) Autor Bastos, Wanderley Rodrigues (2) Bernardi, José Vicente Elias (2) Almeida, Ronaldo (1) Almeida, Ronaldo de (1) Carvalho, Dario Pires de (1) Galvão, Roberta Carolina Ferreira (1) Gomes, João Paulo de Oliveira (1) Lacerda, Luiz Drude de (1) Manzatto, Angelo Gilberto (1) Oliveira, Ronaldo Cavalcante (1) Mais... Palavra-chave Biodiversity and ecosystem services (1) Environmental aspects (1) Knowledge management (1) Krigagem (1) Mercúrio (1) Regressão múltipla (1) Rio Madeira (1) Sedimento de fundo (1) Mais... Tipo do documento Article (1) Journal paper (1) Ano 2013 (1) 2007 (1) País Brazil (1) Germany (1) Idioma Português (1)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última RELAÇÃO ESPACIAL DO MERCÚRIO E ELEMENTOS TRAÇOS EM SEDIMENTO DE FUNDO NO ALTO RIO MADEIRA Ciências Agrárias Galvão, Roberta Carolina Ferreira; Bernardi, José Vicente Elias; Almeida, Ronaldo; Bastos, Wanderley Rodrigues; Gomes, João Paulo de Oliveira. The presence of mercury in several compartments of the aquatic ecosystems represents a problem of great concern in the Amazonian basin. The goal of this work is to correlate the amount mercury found in bottom sediment with other trace elements as well as its spatial distribution in the upper Madeira River. Field samples were acquired on February of 2004. Total mercury quantitative determination was carried out through atomic absorption spectrophotometer analysis with cold vapor generation in flow injection system. Trace elements data analysis was implemented using multiple regression and spatial distribution analysis was developed using indicative kriging geostatistic technique. Multiple regression analysis showed that Hg has a strong dependence with Co,... Tipo: Article Palavras-chave: Mercúrio; Krigagem; Regressão múltipla; Sedimento de fundo; Rio Madeira. Ano: 2007 URL: http://hdl.handle.net/2315/81 Flood pulse and spatial dynamics of mercury in sediments in Puruzinho lake, Brazilian Amazon. Organic Eprints Almeida, Ronaldo de; Bernardi, José Vicente Elias; Oliveira, Ronaldo Cavalcante; Carvalho, Dario Pires de; Manzatto, Angelo Gilberto; Lacerda, Luiz Drude de; Bastos, Wanderley Rodrigues. The study was conducted in Puruzinho lake (Humaitá, AM) considering seasonal periods of rainy and dry in way to elucidate the flood pulse importance in the deposition, remobilization and distributions of mercury and organic matter in bottom sediments in the Madeira River Basin (Brazilian Amazon). Bottom sediments and soils samples were analyzed for total mercury and organic matter. Mercury concentrations obtained in bottom sediment were 32.20-146.40 ng g-1 and organic matter values were 3.5 - 18.0%. The main region for accumulation of mercury and organic matter was in the central and deepest lake area In the rainy season there was a greater distribution of Hg and organic matter, mainly controlled by means of income of the Madeira river water during... Tipo: Journal paper Palavras-chave: Biodiversity and ecosystem services; Environmental aspects; Knowledge management. Ano: 2013 URL: http://orgprints.org/28995/1/Almeida_Flood.pdf Registros recuperados: 2 Primeira ... 1 ... Última

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