Showing papers by "José Antônio Baptista Neto published in 2012"

ESTUDO GEOAMBIENTAL DAS CONCENTRAÇÕES DE HIDROCARBONETOS DE PETRÓLEO (POLICÍCLICOS AROMÁTICOS - HPAs) AO LONGO DO RIO ESTRELA, BAÍA DE GUANABARA - RJ Geoenvironmental studies about concentrations of petroleum hydrocarbons (polylyclic aromatic - PAHs) along the Rio Estrela, Baía de Guanabara - RJ

Abstract: In this study, the geochemical analysis of ten sediments samples collected along the fluvial system of the Estrela River, located in the northern portion of Guanabara Bay, shows the presence of anthropogenic impacts in this area. Concentrations of polycyclic aromatic hydrocarbons (PAHs) obtained were slightly higher when compared with values found in natural environments. The PAHs were tested in sediments along the drainage basin of Estrela River. Although the compounds found in this area have occurred in low proportions, PAHs compounds detected, with high molecular weight, are mutagenic and carcinogenic. For these reason, understanding PAHs transport, fate and environmental risk to ecological system, especially for aquatic ecosystem, are important forms of monitor this environment.

ESTUDO GEOAMBIENTAL DAS CONCENTRAÇÕES DE HIDROCARBONETOS DE PETRÓLEO (POLICÍCLICOS AROMÁTICOS – HPAs) AO LONGO DO RIO ESTRELA, BAÍA DE GUANABARA – RJ

Abstract: DOI 10.12957/tamoios.2012.5083 RESUMO Neste estudo, analises geoquimicas de dez amostras de sedimentos coletados ao longo do sistema fluvial do Rio Estrela, localizado ao norte da Baia de Guanabara, evidenciam a presenca de impactos antropogenicos nesta area. As concentracoes de hidrocarbonetos policiclicos aromaticos (HPAs) obtidas mostraram-se ligeiramente elevadas, quando comparadas com valores encontrados em ambientes naturais. Os HPAs foram analisados nos sedimentos ao longo da bacia do Rio Estrela. Embora as concentracoes destes compostos detectados nesta area tenham ocorrido em baixas proporcoes, os tipos de HPAs detectados com alto peso molecular, sao mutagenicos e carcinogenicos. Por esta razao, compreender a dinâmica de transporte, deposicao e riscos ambientais dos HPAs para o sistema ecologico, especialmente para o sistema aquatico, sao importantes formas de monitoramento deste ambiente. Palavras chaves: Rio Estrela, Baia de Guanabara, Poluicao, HPAs ABSTRACT In this study, the geochemical analysis of ten sediments samples collected along the fluvial system of the Estrela River, located in the northern portion of Guanabara Bay, shows the presence of anthropogenic impacts in this area. Concentrations of polycyclic aromatic hydrocarbons (PAHs) obtained were slightly higher when compared with values found in natural environments. The PAHs were tested in sediments along the drainage basin of Estrela River. Although the compounds found in this area have occurred in low proportions, PAHs compounds detected, with high molecular weight, are mutagenic and carcinogenic. For these reason, understanding PAHs transport, fate and environmental risk to ecological system, especially for aquatic ecosystem, are important forms of monitor this environment. Keywords: Estrela River, Guanabara Bay, Pollution, PAHs