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. The formation of secondary organic aerosol products from photo-oxidation of 1,3butadiene and ozone was investigated in static smog chamber. The effects of ozone concentration and relative humidity on the particle formation were studied. Research suggests that with the increase of ozone concentration (0-50 ppm), the particle size of particles larger than 0.7 μm accounted for the proportion of the total number of particles increased and the initial stage of the ozone decomposition rate increased. But the increase in ozone concentration has little effect on the total number of particles. Relative humidity of 4% and 25% of the experimental data show that in the relative humidity of 25%, the initial stage of the ozone decomposition rate is faster and particle size larger than 0.7 μm accounted for a larger proportion of the total number of particles. In the same way, the change in relative humidity has little effect on the total number of particles.

Effects of Ozone concentration and relative humidity on secondary organic aerosol formation from reactions of 1,3-butadiene with ozone