HPA e Nitro-HPA em Ambiente Semifechado Impactado por Emissão da Combustão de Diesel/Biodiesel (B5)

• Published in: Orbital : The Electronic Journal of Chemistry 2015-07, Vol.7 (3), p.245
• Main Authors: Sabino, Fabio Cal, Pinto, Jurandir Pereira, Picarelli, Victor Pontes, Amador, Ismael R., Martins, Leila D., Hoffmann, Thorsten, Solci, Maria Cristina
• Format: Article
• Language: English
• Subjects: Air pollution; Analysis; biodiesel emission; Biomass energy; Combustion; High performance liquid chromatography; Mass spectrometry; nitro-PAH; PAH; Polycyclic aromatic hydrocarbons; toxic pollutants
• ISSN: 1984-6428; 1984-6428
• DOI: 10.17807/orbital.v7i3.737

In order to verify the presence of polycyclic aromatic hydrocarbons (PAHs) and nitro-PAH (NPAH) associated with the fine fraction of particulate matter ([PM.sub.1.0] and [PM.sub.2.5]) from the combustion of diesel/biodiesel mixture (B5), daily samples were carried out in the urban bus station of Londrina. A high performance liquid chromatography with mass spectrometry (LC-APCI-MS) was used for the determination of nitro-PAH and the PAHs were determined by high performance liquid chromatography equipped with fluorescence detector (LC-FLD). 9 PAHs and 1-nitropyrene were determined. The concentrations of the PAHs with 4 to 6 rings (fluoranthene, pyrene, crysene, benzo(b)fluoranthene, benzo(k)fluoranthene and dibenzo(a,h)antharacene) were higher in comparison to the lighter PAHs (acenaphthene, fluorene and anthracene). The [SIGMA]PAH associated to the [PM.sub.1.0] corresponded to 66% of the [PM.sub.2.5] with concentrations that exceed the levels recommended by WHO. The diagnostic ratios (DR) of PAHs and NPAH were calculated and the results suggest diesel/biodiesel (B5) emissions. The use of biofuel in Brazil is encouraged and the monitoring of changes in emissions arising from combustion processes is important and necessary to follow the change of air quality and the impact on the environment. Keywords: biodiesel emission; PAH; nitro-PAH; toxic pollutants