Articles | Volume 25, issue 8
https://doi.org/10.5194/acp-25-4587-2025
https://doi.org/10.5194/acp-25-4587-2025
Research article
 | 
30 Apr 2025
Research article |  | 30 Apr 2025

Source apportionment and ecotoxicity of PM2.5 pollution events in a major Southern Hemisphere megacity: influence of a biofuel-impacted fleet and biomass burning

Guilherme Martins Pereira, Leonardo Yoshiaki Kamigauti, Rubens Fabio Pereira, Djacinto Monteiro dos Santos, Thayná da Silva Santos, José Vinicius Martins, Célia Alves, Cátia Gonçalves, Ismael Casotti Rienda, Nora Kováts, Thiago Nogueira, Luciana Rizzo, Paulo Artaxo, Regina Maura de Miranda, Marcia Akemi Yamasoe, Edmilson Dias de Freitas, Pérola de Castro Vasconcellos, and Maria de Fatima Andrade

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Cited articles

Abram, N. J., Henley, B. J., Sen Gupta, A., Lippmann, T. J. R., Clarke, H., Dowdy, A. J., Sharples, J. J., Nolan, R. H., Zhang, T., Wooster, M. J., Wurtzel, J. B., Meissner, K. J., Pitman, A. J., Ukkola, A. M., Murphy, B. P., Tapper, N. J., and Boer, M. M.: Connections of climate change and variability to large and extreme forest fires in southeast Australia, Commun. Earth Environ., 2, 1–17, https://doi.org/10.1038/s43247-020-00065-8, 2021. 
Akyüz, M. and Cabuk, H.: Gas-particle partitioning and seasonal variation of polycyclic aromatic hydrocarbons in the atmosphere of Zonguldak, Turkey, Sci. Total Environ., 408, 5550–5558, https://doi.org/10.1016/j.scitotenv.2010.07.063, 2010. 
Allen, A. G., Cardoso, A. A., Wiatr, A. G., Machado, C. M. D., Paterlini, W. C., and Baker, J.: Influence of intensive agriculture on dry deposition of aerosol nutrients, J. Braz. Chem. Soc., 21, 1, https://doi.org/10.1590/S0103-50532010000100014, 2010. 
Almeida, S. M., Pio, C. A., Freitas, M. C., Reis, M. A., and Trancoso, M. A.: Approaching PM2.5 and PM2.5–10 source apportionment by mass balance analysis, principal component analysis and particle size distribution, Sci. Total Environ., 368, 663–674, https://doi.org/10.1016/j.scitotenv.2006.03.031, 2006. 
Alves, C., Rienda, I. C., Vicente, A., Vicente, E., Gonçalves, C., Candeias, C., Rocha, F., Lucarelli, F., Pazzi, G., Kováts, N., Hubai, K., Pio, C., and Tchepel, O.: Morphological properties, chemical composition, cancer risks and toxicological potential of airborne particles from traffic and urban background sites, Atmos. Res., 264, 105837, https://doi.org/10.1016/j.atmosres.2021.105837, 2021. 
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The chemical composition of fine particulate matter was studied in the megacity of São Paulo (Brazil) during a polluted period. Vehicular-related sources remain relevant; however, a high contribution of biomass burning was observed and correlated with sample ecotoxicity. Emerging biomass burning sources, such as forest fires and sugarcane-bagasse-based power plants, highlight the need for additional control measures alongside stricter rules concerning vehicular emissions.
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