Produção Nacional
Revisado por pares
FATORES DE EMISSÃO DE COMPOSTOS CARBONÍLICOS MEDIDOS EM UM TÚNEL DO RIO DE JANEIRO, BRASIL, EM CONDIÇÕES REAIS DE DIRIGIBILIDADE
2020; Brazilian Chemical Society; Linguagem: Inglês
10.21577/0100-4042.20170502
ISSN1678-7064
AutoresJosé Almeida, Andre Braga, Leonardo Ribeiro Bastos, Graciela Arbilla, Eduardo Monteiro Martins,
Tópico(s)Geochemistry and Geologic Mapping
ResumoBRAZIL.Real-world vehicle emissions of carbonyls compounds (CC) were determined at the Rebouças Tunnel, Rio de Janeiro (Brazil).The tunnel is a two-bore tunnel with three lanes in each direction and has a length of 2840 m, divided in two sections.On average, approximately 5,000 vehicles (95% light duty) were passing the tunnel per hour.Sixteen samples were simultaneously collected 500 and 1500 m inside from the entrance.The main CC were formaldehyde, acetaldehyde, acetone, propionaldehyde and benzaldehyde.A total of 16 samples were collected in each point in 8 different days.In 5 days, CO and CO 2 were also monitored during the sampling period.Emission factors were calculated.Using the Pierson method, emission factors were 7.5 ± 2.6 and 13.8 ± 5.7 mg km -1 for formaldehyde and acetaldehyde, respectively.Using the fuel consumption method, values were 6.3 ± 2.1 and 11.8 ± 3.9 mg km -1 for the same compounds.The differences between both methods were lower than 20% and may be considered acceptable considering all the approximations in the calculations.Ozone forming potentials (OFP) were also estimated as 90.4 ± 37.3 and 70.7 ± 24.6 mg km -1 for formaldehyde and acetaldehyde, respectively.
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