Presença e Tipologia de HPAs em moluscos bivalves de Santa Catarina e Rio de Janeiro, Brasil

• Autor(a) principal: Ramos, Ana Beatriz Azevedo
• Data de Publicação: 2016
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Biblioteca Digital de Teses e Dissertações da UERJ
• Texto Completo: http://www.bdtd.uerj.br/handle/1/13908
• topic: PAHs; Biomarkers; Mussels; Cockles; Oysters; Florianópolis; Guanabara Bay; HPAs; Biomarcadores; Mexilhões; Berbigões; Ostras; Florianópoli; Baía de Guanabara; CNPQ::CIENCIAS EXATAS E DA TERRA::OCEANOGRAFIA::OCEANOGRAFIA QUIMICA

Polycyclic aromatic hydrocarbons (PAHs) are broadly studied due to their deleterious effects on organisms and humans. Many compounds of PAHs are capable to reacting with the DNA and making it carcinogenic and/or mutagenic. The objective of this study was to evaluate the presence of PAHs in tissue of Crassostrea sp. (oyster), Perna perna (mussels) e Anomalocardia brasiliana (clams/cockles) and the distribution of these compounds in suspended particular matter (SPM) and surface sediments in two contrasting Brazilian coastal areas that it is subject to different levels of anthropogenic impact. PAHs were analyzed by GC-MS in three mussels and oyster size-classes samples and two clams size-classes samples further sediments and SPM. The results for Σ total PAHs in the sediments were 160.8 to 219.9 ng.g-1 and 200.5 to 8139.5 in Ribeirão da Ilha and Ilha do Governador, respectively. To the SPM was obtained a variation between 57.2 to 654.5 ng.g-1 in Ribeirão da Ilha and 25.9 to 133.9 ng.g-1 in the Ilha do Governador. In relation to biological samples, the concentration of Σ total PAHs in the Ribeirão da Ilha varied between 432.7 and 700.2 ng.g-1, 115.7 and 731.9 and 159.9 and 888.9 ng.g-1 for mussels, cockles and oysters, respectively. And in Ilha do Governador the mussels, cockles and oysters composite samples varied between 544.9 and 848.8 ng.g-1, 186.2 and 329.9 ng.g-1, and 941.8 and 1785.1 ng.g-1, respectively. In general, it was observed a greater accumulation of the compounds of lowest molecular weight in the samples. And the predominance of the alkylated compounds, which represent more than 75% of the Σ total PAHs for all biological samples, that can indicate an oil contamination and/or derivatives thereof. There were no significant differences between the different size-class, as there were no significant differences for Σ 16 PAHs and Σ total PAHs between the two regions studied. Our results show that Ribeirão da Ilha and Ilha do Governador organisms display low to moderate contamination, confirming the use of these organisms as sentinels of environmental contamination. All samples had benzo(a)pyrene concentrations below the established European Union threshold to tissue of bivalve mollusks.