Articles | Volume 16, issue 20
https://doi.org/10.5194/acp-16-13105-2016
https://doi.org/10.5194/acp-16-13105-2016
Research article
 | 
26 Oct 2016
Research article |  | 26 Oct 2016

Quantification of environmentally persistent free radicals and reactive oxygen species in atmospheric aerosol particles

Andrea M. Arangio, Haijie Tong, Joanna Socorro, Ulrich Pöschl, and Manabu Shiraiwa

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Cited articles

Abbas, K., Hardy, M., Poulhès, F., Karoui, H., Tordo, P., Ouari, O., and Peyrot, F.: Detection of superoxide production in stimulated and unstimulated living cells using new cyclic nitrone spin traps, Free Radical Biol. Med., 71, 281–290, 2014.
Badali, K. M., Zhou, S., Aljawhary, D., Antiñolo, M., Chen, W. J., Lok, A., Mungall, E., Wong, J. P. S., Zhao, R., and Abbatt, J. P. D.: Formation of hydroxyl radicals from photolysis of secondary organic aerosol material, Atmos. Chem. Phys., 15, 7831–7840, https://doi.org/10.5194/acp-15-7831-2015, 2015.
Bahrle, C., Nick, T. U., Bennati, M., Jeschke, G., and Vogel, F.: High-Field Electron Paramagnetic Resonance and Density Functional Theory Study of Stable Organic Radicals in Lignin: Influence of the Extraction Process, Botanical Origin, and Protonation Reactions on the Radical g Tensor, J. Phys. Chem. A, 119, 6475–6482, 2015.
Bateman, A. P., Belassein, H., and Martin, S. T.: Impactor Apparatus for the Study of Particle Rebound: Relative Humidity and Capillary Forces, Aerosol Sci. Technol., 48, 42–52, 2014.
Berkemeier, T., Steimer, S., Krieger, U. K., Peter, T., Pöschl, U., Ammann, M., and Shiraiwa, M.: Ozone uptake on glassy, semi-solid and liquid organic matter and the role of reactive oxygen intermediates in atmospheric aerosol chemistry, Phys. Chem. Chem. Phys., 18, 12662–12674, 2016.
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Short summary
We have quantified environmentally persistent free radicals and reactive oxygen species (ROS) in size-segregated atmospheric aerosol particles. We suggest that ROS were formed by decomposition of secondary organic aerosols interacting with transition metal ions and quinones contained in humic-like substances. The results have significant implications for aqueous-phase and cloud processing of organic aerosols as well as adverse health effects upon respiratory deposition of aerosol particles.
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