The Particle Morphology Effect of Atmospheric Aerosols on the Interaction Kinetics with Volatile Impurities
The analysis of solid particle morphology effect for atmospheric aerosols on the uptake coefficients with volatile impurities has been performed for those determined in the laboratory experiments as well as of the effect on the rate coefficients used in the transport atmospheric models for fate of the impurities in the heterogeneous processes. The equations for correct determination of the uptake coefficients from dependence of observable rate and uptake coeffi cients on the substrate mass in the flow reactors have been proposed. It was demonstrated that most of mineral and carbon aerosols in the atmosphere are the aggregates of nanoparticles or the particles with internal nanopores. Be cause of this, the use of impermeable spherical particles approximation to these particles leads to underestimation of heterogeneous fate rate for the impurities from the atmosphere. The possibility for acceleration of the reactions fol lowing via Langmuir-Hinshelwood mechanism is found through interaction of the impurities with nanopore walls in the atmospheric particles and formation of stable adsorption complexes on the surface.