Investigation of the mechanism of organic aerosol formation in urban air: interaction between anthropogenic and biogenic compounds
G. G. DULTSEVA1,2, S. N. DUBTSOV1,2, T. V. KOBZEVA1
1Voevodsky Institute of Chemical Kinetics and Combustion, Siberian Branch of the Russian Academy of Sciences, Novosibirsk, Russia
2Institute of Computational Mathematics and Mathematical Geophysics, Siberian Branch of the Russian Academy of Sciences, Novosibirsk, Russia
Keywords: photochemical aerosol formation, atmospheric organic aerosol, biogenic aldehydes, urban air pollution
Abstract
The mechanism of atmospheric organic aerosol formation in the interaction of the aldehydes emitted by plants with typical urban air pollutants has been investigated. The kinetics of aerosol formation in the aldehyde vapour was studied under laboratory conditions, and the effect of ozone and nitrogen oxides on the rate and mechanism of condensable product formation was determined. The chemical nature of the terminal groups of a growing organic chain was determined to change in the presence of increased ozone concentration. The effect of biogenic aldehydes on the reduction of polluted urban air toxicity was assessed. The field measurements were carried out, revealing the role of vegetation in the reduction of toxic action of anthropogenic air pollutants.
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