title: FTIR analysis and evaluation of carcinogenic and mutagenic risks of nitro-polycyclic aromatic hydrocarbons in PM1.0.
abstract: Nitro-polycyclic aromatic hydrocarbons (NPAHs) represent a group of organic compounds of significant interest due to their presence in airborne particulates of urban centers, wide distribution in the environment, and mutagenic and carcinogenic properties. These compounds, associated with atmospheric particles of size < 1 μm, have been reported as a major risk to human health. This study aims at identifying the spectral features of NPAHs (1-nitropyrene, 2-nitrofluorene, and 6-nitrochrysene) in emissivity and transmittance spectra of samples of particulate matter < 1 μm (PM1.0) using infrared spectrometry. Carcinogenic and mutagenic risks of the studied NPAHs associated with PM1.0 samples were also determined for two sampling sites: Canoas and Sapucaia do Sul. The results showed that NPAH standard spectra can effectively identify NPAHs in PM1.0 samples. The transmittance and emissivity sample spectra showed broader bands and lower relative intensity than the standard NPAH spectra. The carcinogenic risk and the total mutagenic risk were calculated using the toxic equivalent factors and mutagenic potency factors, respectively. Canoas showed the highest total carcinogenic risk, while Sapucaia do Sul had the highest mutagenic risk. The seasonal analysis suggested that in the study area the ambient air is more toxic during the cold periods. These findings might of significant importance for the decision and policy making authorities.
authors.affiliation: Programa de Pós-graduação em Sensoriamento Remoto, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil.
authors.forename: Ismael Luís
authors.initials: IL
authors.lastname: Schneider
authors.affiliation: Programa de Pós-graduação em Sensoriamento Remoto, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil; Fundação Estadual de Proteção Ambiental Henrique Luís Roessler, Porto Alegre, RS, Brazil. Electronic address: gerpro.pesquisa@fepam.rs.gov.br.
authors.forename: Elba Calesso
authors.initials: EC
authors.lastname: Teixeira
authors.affiliation: Programa de Pós-graduação em Sensoriamento Remoto, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil.
authors.forename: Dayana Milena
authors.initials: DM
authors.lastname: Agudelo-Castañeda
authors.affiliation: Laboratory of Environmental Researches and Nanotechnology Development, Centro Universitário La Salle, Mestrado em Avaliação de Impactos Ambientais em Mineração, Canoas, RS, Brazil.
authors.forename: Gabriel
authors.initials: G
authors.lastname: Silva E Silva
authors.affiliation: Instituto de Física, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil.
authors.forename: Naira
authors.initials: N
authors.lastname: Balzaretti
authors.affiliation: Programa de Pós-graduação em Sensoriamento Remoto, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil.
authors.forename: Marcel Ferreira
authors.initials: MF
authors.lastname: Braga
authors.affiliation: Laboratory of Environmental Researches and Nanotechnology Development, Centro Universitário La Salle, Mestrado em Avaliação de Impactos Ambientais em Mineração, Canoas, RS, Brazil.
authors.forename: Luís Felipe Silva
authors.initials: LFS
authors.lastname: Oliveira
mesh_terms: D015197:Carcinogenicity Tests; D002273:Carcinogens / Q000032:analysis; D004784:Environmental Monitoring / Q000379:methods; D009153:Mutagens / Q000032:analysis; D052638:Particulate Matter / Q000032:analysis / Q000633:toxicity*; D011084:Polycyclic Aromatic Hydrocarbons / Q000032:analysis / Q000633:toxicity*; D018570:Risk Assessment; D017550:Spectroscopy, Fourier Transform Infrared
chemical_list: D002273:Carcinogens; D009153:Mutagens; D052638:Particulate Matter; D011084:Polycyclic Aromatic Hydrocarbons
keywords: Emissivity; FTIR; NPAH; PM(1.0); Toxicity; Transmittance