Caracterização da variação, a curto prazo, das concentrações de hidrocarbonetos policíclicos aromáticos em material particulado, da região central de Niterói (RJ)

• Ano de defesa: 2012
• Autor(a) principal: Franco, Caroline Fernandes Jaegger
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Programa de Pós-graduação em Química; Química
• Palavras-chave em Português: Hidrocarbonetos policíclicos aromáticos; material particulado atmosférico; Niterói; Hidrocarboneto; Material particulado em suspensão; Poluição do ar; Polycyclic aromatic hydrocarbons; atmospheric particulate matter; Hidrocarbon; suspended particulate matter; Air Pollution; CNPQ::CIENCIAS EXATAS E DA TERRA::QUIMICA
• Link de acesso: https://app.uff.br/riuff/handle/1/20627

Polycyclic aromatic hydrocarbons (PAHs) are ubiquitous persistent pollutants that have been described in all environmental compartments and classified by USEPA as priority pollutants. PAHs were determined in Atmospheric Particulate Matter (MPA), total suspended particulates (TSP) and inhalable particulates (PM10) collected in the central region of Niterói, a city of the State of Rio de Janeiro (Brazil), in three short periods (7 to 8 days) for the months of June and December 2011 and May 2012. The TSP samples were acquiried using a high volume sampler for total suspended particulates (Hi-vol) and PM10 by Small Volume Sampler was used to collect inhalable particles (PM10). Particulate matters collected on filters were extracted in the ultrasonic bath using dichloromethane as the extraction solvent. The extracts were subsequently analyzed using High Resolution Gas hromatography coupled to Mass Spectrometry (HRGC/MS). The concentration of PAHs over these three short periods of sampling ranged from 0.01 to 0.94 ng m-3 in PTS and 0.01 to 3.42 ng m-3 in MP10. The highest concentrations were observed in samples MP10, MP10 ΣHPA average of 3.01 ng m-3 and 2.22 ng m-3 in samples of PTS. There was no correlation between meteorological parameters temperature, humidity and rainfall and the data of PAHs in TSP and PM10 obtained. The concentrations of PAHs were well inferior than values observed in other Brazilian urban areas, comparable to those observed green areas. PAHs with 4-5 rings were predominant in the samples, indicating the main source of emission combustion of fossil fuels.