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	Provedor de dados Anais da ABC (AABC) (4) Autor Smith,Bernard J. (4) Baptista Neto,José A. (2) Baptista-Neto,José A. (2) Fonseca,Estefan M. (2) Castanheira,Fabio S. (1) McAlister,John (1) McAllister,John J. (1) Mcalister,John J. (1) Mcallister,John J. (1) Patchineelam,Sambasiva R. (1) Patchineelam,Soraya M. (1) Peixoto,Tomás C.S. (1) Pereira,Edisio (1) Rangel,Carlos M. A. (1) Silva,Maria Augusta M. (1) Mais... Palavra-chave Guanabara Bay (3) 210Pb (1) Air pollution (1) Estrela River (1) Flux of heavy metal (1) Fractionation (1) Geochronology (1) Granite (1) Gypsum crusts (1) Heavy metal (1) Heavy metals (1) Marine aerosols (1) Urban runoff (1) Weathering (1) Mais... Tipo do documento Info:eu-repo/semantics/article (4) Ano 2013 (1) 2011 (1) 2007 (1) 2006 (1) País Brazil (4) Idioma Inglês (4)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 4 Primeira ... 1 ... Última The contribution of heavy metal pollution derived from highway runoff to Guanabara Bay sediments: Rio de Janeiro / Brazil Anais da ABC (AABC) Pereira,Edisio; Baptista-Neto,José A.; Smith,Bernard J.; Mcallister,John J.. In this study, geochemical and particle size analyses of thirty-four street sediment samples collected from an urban environment around Guanabara Bay, shows highway run-off to be a potential source of heavy metals for the pollution of near-shore sedimentary deposits. Concentrations of Fe, Mn, Zn, Cu, Pb, Cr and Ni were found to be higher in these sediments when compared to concentrations found in samples from the natural environment, where an Enrichment Factor (EF) index was used to distinguish between natural and anthropogenic sources. Particle size analysis shows these sediments to be predominantly composed of sand and no distribution pattern was observed between the sand, silt and clay fractions. High levels of organic matter and heavy metals would... Tipo: Info:eu-repo/semantics/article Palavras-chave: Heavy metals; Urban runoff; Guanabara Bay. Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652007000400013 Geochronology and heavy metal flux to Guanabara bay, Rio de Janeiro state: a preliminary study Anais da ABC (AABC) Baptista Neto,José A.; Peixoto,Tomás C.S.; Smith,Bernard J.; Mcalister,John J.; Patchineelam,Soraya M.; Patchineelam,Sambasiva R.; Fonseca,Estefan M.. Guanabara Bay, located in Rio de Janeiro state. It is surrounded by the second most important metropolitan area of the country. Over recent decades, land disturbance and urbanization in the surrounding area has significantly increased sediment input to the bay and had a negative effect on its overall environmental. This is especially related to high volumes of untreated sewage and industrial effluents. This study evaluates the history of this human impact through detailed examination of a sediment core taken from the northern portion of Guanabara Bay. A geochronology is established using 210Pb dating and related to organic carbon and heavy metal fluxes to the sediments. This gave a calculated net average sedimentation rate for the core of 0.67 cm.year-1.... Tipo: Info:eu-repo/semantics/article Palavras-chave: 210Pb; Geochronology; Flux of heavy metal; Guanabara Bay. Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652013000401317 Surface modification of a granite building stone in central Rio de Janeiro Anais da ABC (AABC) Baptista-Neto,José A.; Smith,Bernard J.; McAllister,John J.; Silva,Maria Augusta M.; Castanheira,Fabio S.. In order to evaluate environmental controls on the soiling formation and decay of building stones a set of mapping and physical and chemical analyses were carried out on granite from a historical church in the polluted centre of Rio de Janeiro. These techniques highlight the increasing of threatening damage on generally perceived as a durable building material, caused by granular disaggregation and contour scaling in areas close to ground level. Mapping also indicated the formation of black crusts over entire building façades, concentrated on areas sheltered from rain-wash. Analyses demonstrated the influence of marine aerosols, rock and mortar composition and mostly of the atmospheric pollutants on the decay and soiling of the granite. Much of the decay... Tipo: Info:eu-repo/semantics/article Palavras-chave: Weathering; Granite; Air pollution; Marine aerosols; Gypsum crusts. Ano: 2006 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652006000200011 Study of heavy metal concentration and partitioning in the Estrela River: implications for the pollution in Guanabara Bay - SE Brazil Anais da ABC (AABC) Rangel,Carlos M. A.; Baptista Neto,José A.; Fonseca,Estefan M.; McAlister,John; Smith,Bernard J.. In this study, the geochemical analysis of ten sediment samples collected along the fluvial system of the Estrela River, which flows into the northern portion of Guanabara Bay, shows the presence of anthropogenic impacts in this area. Concentrations of Fe, Mn, Zn, Cu, Pb, Cr and Ni obtained were slightly higher, when compared with values found innatural environments. The particle size and organic matter content in most of the analyzed stations showed featuresnot conducive to the accumulation of pollutants due to the low organic matter content and the strong presence ofsand fraction. There was also the fractionation of heavy metals in sediments and it was found the prominence ofresidual and reducible phase, besides the significant occurrence of organic... Tipo: Info:eu-repo/semantics/article Palavras-chave: Estrela River; Guanabara Bay; Heavy metal; Fractionation. Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652011000300005 Registros recuperados: 4 Primeira ... 1 ... Última

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