Secondary organic aerosol formation from the ozonolysis and oh-photooxidation of 2,5-dimethylfuran

In this study, the O3 and OH radical oxidation of 2,5-dimethylfuran (2,5-DMF) were investigated in two different chambers at (296±1) K atmospheric pressure to examine secondary organic aerosol (SOA) formation. Results for OH-photooxidation indicate that SOA yieldsdecrease (from 6.2 0.4) with rise 2,5-DMF concentration (from10 1000 ppb). absence NOx under high relative humidity (RH) conditions (60%), higher yields are favoured. formation is dependent on initial seed surface kinds inorganic particles ((NH4)2SO4 CaCl2), being effect slightly greater CaCl2. The ozonolysis only generates presence SO2 increase from 0 15% lowers particle number mass concentrations. water-to-SO2 rate constant ratio Criegee intermediate was derived yield experiments values, kH2O/kSO2 = (1.6±0.4)x10−5.