Articles | Volume 16, issue 3
https://doi.org/10.5194/acp-16-1761-2016
https://doi.org/10.5194/acp-16-1761-2016
Research article
 | 
15 Feb 2016
Research article |  | 15 Feb 2016

Hydroxyl radicals from secondary organic aerosol decomposition in water

Haijie Tong, Andrea M. Arangio, Pascale S. J. Lakey, Thomas Berkemeier, Fobang Liu, Christopher J. Kampf, William H. Brune, Ulrich Pöschl, and Manabu Shiraiwa

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We provide experimental evidence that terpene and isoprene SOA form substantial amounts of OH radicals upon interaction with liquid water and iron. Our measurements and model results imply that the chemical reactivity of SOA in the atmosphere, particularly in clouds, can be faster than previously thought. Inhalation and deposition of SOA particles in the human respiratory tract may lead to a substantial release of OH radicals in vivo, causing oxidative stress and adverse aerosol health effects.
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