2019-09-032019-09-032012SILVA, Claudia Danielle de Lima da. Estudo da distribuição dos hidrocarbonetos policíclicos aromáticos (HPAs) nos sedimentos de fundo da bacia do guajará, porto de Miramar (Belém-Pará). Orientador: José Augusto Martins Corrêa. 2012. 83 f. Trabalho de Curso (Bacharelado em Geologia) - Faculdade de Geologia, Instituto de Geociências, Universidade Federal do Pará, Belém, 2012. Disponível em: http://bdm.ufpa.br/jspui/handle/prefix/1916. Acesso em:.http://bdm.ufpa.br/jspui/handle/prefix/1916The Polycyclic Aromatic Hydrocarbons (PAHs) are compounds that may produce toxic and carcinogenic effects to humans and animals. When released into the environment, it can cause damages in the ecosystems. There are two main sources of PAHs in contaminated areas: combustion and fossil fuels. In Belem, previous studies suggested a PAH contamination in sediments of Guajará bay. The aim of this work was, therefore, the study of sediment quality near the Miramar harbor. Surface sediments were collected and the extracts analyzed (16 PAHs) by high performance liquid chromatography (HPLC). Total PAH concentrations ranged among 2.454 to 533 ng/g-1 of dry sediment. The resulting distributions and molecular ratios of specific aromatic compounds (acenaphthylene, anthracene and naphthalene) have been discussed in terms of sample location, origin of the organic matter and clay content. The collected data show that the Miramar harbor area is moderately contaminated. Good correlations observed between a certain number of pairs of isomer PAH concentrations allowed to identify five origin molecular indices that were used to identify the PAH contamination sources in the studied sampling stations: Fl/(Fl+Py), Fl/Py, BaA/(BaA+Cri), BaA/Cri, Ant/(Ant+Fen). In general, the Miramar harbor sampling sites were contaminated mainly by petrogenic PAHs, due to petroleum trade at individual scale along the Guajará bay. Near the Una channel the samples were polluted by pyrolytic origin PAHs. Interferences of rather petrogenic and pyrolytic PAH contaminations were noticed in the Miramar harbor due to petroleum products deliveries and fuel combustion emissions from the ships staying alongside the quays. The level of contamination and the relative distributions of PAHs are concentrated in the harbor area. A strong pretrogenic and minor pyrolytic source fingerprint has been recorded, but the detection of high amounts of acenaphthylene which is always the most abundant PAH, indicates a dominant petrogenic origin.Acesso AbertoGeoquímica ambientalContaminação por HPAsSedimentos de fundoPorto de Miramar (Belém-Pará)CNPQ::CIENCIAS EXATAS E DA TERRA::GEOCIENCIAS::GEOLOGIATrabalho de Curso - Graduação - Monografia