Articles | Volume 16, issue 21
https://doi.org/10.5194/acp-16-13929-2016
https://doi.org/10.5194/acp-16-13929-2016
Research article
 | 
11 Nov 2016
Research article |  | 11 Nov 2016

The effect of particle acidity on secondary organic aerosol formation from α-pinene photooxidation under atmospherically relevant conditions

Yuemei Han, Craig A. Stroud, John Liggio, and Shao-Meng Li

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Cited articles

Aschmann, S. M., Atkinson, R., and Arey, J.: Products of reaction of OH radicals with alpha-pinene, J. Geophys. Res., 107, 4191, https://doi.org/10.1029/2001JD001098, 2002.
Atkinson, R.: Atmospheric chemistry of VOCs and NOx, Atmos. Environ., 34, 2063–2101, 2000.
Bae, M. S., Schwab, J. J., Zhang, Q., Hogrefe, O., Dermerjian, K. L., Weimer, S., Rhoads, K., Orsini, D., Venkatachari, P., and Hopke, P. K.: Interference of organic signals in highly time resolved nitrate measurements by low mass resolution aerosol mass spectrometry, J. Geophys. Res. Atmos., 112, 1–16, https://doi.org/10.1029/2007JD008614, 2007.
Barsanti, K. C. and Pankow, J. F.: Thermodynamics of the formation of atmospheric organic particulate matter by accretion reactions – Part 1: aldehydes and ketones, Atmos. Environ., 38, 4371–4382, 2004.
Boyd, C. M., Sanchez, J., Xu, L., Eugene, A. J., Nah, T., Tuet, W. Y., Guzman, M. I., and Ng, N. L.: Secondary organic aerosol formation from the β-pinene + NO3 system: effect of humidity and peroxy radical fate, Atmos. Chem. Phys., 15, 7497–7522, https://doi.org/10.5194/acp-15-7497-2015, 2015.
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Short summary
This study investigates the acidity effect on the yield and chemical composition of α-pinene secondary organic aerosol based on a series of laboratory experiments performed using a photochemical reaction chamber under high- and low-NOx conditions. We have found that the acidity effect largely depends on NOx level and the inorganic acidity has a significant role to play in determining various organic aerosol chemical properties such as mass yields, oxidation state, and organic nitrate content.
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