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Aerosol formation yields from the reaction of catechol with ozone

Abstract : The formation of secondary organic aerosol from the gas-phase reaction of catechol (1,2-dihydroxybenzene) with ozone has been studied in two smog chambers. Aerosol production was monitored using a scanning mobility particle sizer and loss of the precursor was determined by gas chromatography and infrared spectroscopy, whilst ozone concentrations were measured using a UV photometric analyzer. The overall organic aerosol yield (Y) was determined as the ratio of the suspended aerosol mass corrected for wall losses (Mo) to the total reacted catechol concentrations, assuming a particle density of 1.4 g cm 3. Analysis of the data clearly shows that Y is a strong function of Mo and that secondary organic aerosol formation can be expressed by a one-product gas-particle partitioning absorption model. The aerosol formation is affected by the initial catechol concentration, which leads to aerosol yields ranging from 17% to 86%. The results of this work are compared to similar studies reported in the literature.
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Submitted on : Monday, June 8, 2020 - 2:50:59 PM
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C. Coeur-Tourneur, A. Tomas, A. Guilloteau, Françoise Henry, F. Ledoux, et al.. Aerosol formation yields from the reaction of catechol with ozone. Atmospheric environment, Elsevier, 2009, 43, pp.2360-2365. ⟨10.1016/j.atmosenv.2008.12.054⟩. ⟨hal-02860662⟩



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