| Title: | "Understanding high tropospheric ozone episodes in Bangu, Rio de Janeiro, Brazil" |
| Author(s): | Geraldino CGP; Arbilla G; da Silva CM; Correa SM; Martins EM; |
| Address: | "Instituto de Quimica, Universidade do Estado do Rio de Janeiro, Rio de Janeiro, RJ, Brazil. Instituto de Quimica, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil. Universidade Veiga de Almeida, Rio de Janeiro, RJ, Brazil. Faculdade de Tecnologia, Universidade do Estado do Rio de Janeiro, Resende, RJ, Brazil. Instituto de Quimica, Universidade do Estado do Rio de Janeiro, Rio de Janeiro, RJ, Brazil. edmmartins@gmail.com. Faculdade de Engenharia, Universidade do Estado do Rio de Janeiro, Rio de Janeiro, RJ, Brazil. edmmartins@gmail.com" |
| DOI: | 10.1007/s10661-020-8119-3 |
| ISSN/ISBN: | 1573-2959 (Electronic) 0167-6369 (Linking) |
| Abstract: | "This study investigates the potential factors that contribute to frequent high levels of ozone in Bangu, one of the most critical areas in the city of Rio de Janeiro, regarding ozone levels and air quality. Speciated non-oxygenated volatile organic compounds (VOCs) were measured using method TO-15 (US EPA). The measured concentrations and kinetic and mechanistic analysis of VOC reactivity showed that alkanes were the most important compounds. Ozone concentrations were simulated for a base case representing a day with high ozone levels. Simulated results and statistical multivariate analysis showed that the high ozone concentrations did not seem to be closely related to local emissions but rather were related to pollutant transport and low measured NO(x) levels and were triggered by photochemical activity. The differences between weekdays and weekends were also investigated, showing that ozone concentrations were also higher during weekends, mainly on Sunday, when the diesel heavy vehicle fleet was reduced and lower NO emissions were observed. The VOC/NO(x) ratios correspond to a VOC-limited process, which leads to higher ozone concentrations under low NO(x) conditions" |
| Keywords: | *Air Pollutants/analysis Brazil Cities Environmental Monitoring *Ozone/analysis *Volatile Organic Compounds Air quality modeling Ozipr Ozone episodes VOC/NOx ratios Volatile organic compounds; |
| Notes: | "MedlineGeraldino, Claudio Gabriel Pinheiro Arbilla, Graciela da Silva, Cleyton Martins Correa, Sergio Machado Martins, Eduardo Monteiro eng FAPERJ: E-26/202.793/2015/FAPERJ/ Netherlands 2020/02/03 Environ Monit Assess. 2020 Feb 1; 192(3):156. doi: 10.1007/s10661-020-8119-3" |
