AAAR 36th Annual Conference October 16 - October 20, 2017 Raleigh Convention Center Raleigh, North Carolina, USA
Abstract View
Adsorption of Trace Atmospheric Gases by Carbon-based Aerosol Particles Dispersed from Industrial Sources
BORIS KRASOVITOV, Tov Elperin, Andrew Fominykh, Itzhak Katra, Ben-Gurion University of the Negev, Israel
Abstract Number: 185 Working Group: Urban Aerosols
Abstract Adsorption of trace atmospheric gases by aerosol particles contributes to the evolution of concentration distribution of the trace constituents and can affect subsequent chemical reactions in the atmosphere. We suggest a two dimensional model of adsorption of trace atmospheric constituents by carbon-based particulate matter in air pollution plume dispersed from industrial source. The model is based on the application of theory of turbulent diffusion in the atmospheric boundary layer (ABL) in conjunction with plume dispersion model and model of gas adsorption by porous solid particles. The wind velocity profiles used in the simulations were determined by field measurements conducted in the Northern Negev (Israel) using the experimental wind mast. The adsorbate concentration distributions are calculated for the carbon-based PM2.5-10, which is typical for industrial emissions. The analyses of the obtained results are performed for different meteorological conditions and atmospheric stability classes. We found that spatial evolution of active gas concentration in the gaseous phase strongly depends on the stability of the atmosphere and efficiency of adsorption of various gases by a particulate matter. In the case of the unstable atmosphere, we calculated the ground level concentration distribution of active gases as a function of the distance from the point of release. The obtained results are compared with the available experimental data. The calculated concentration distribution can be used for the assessments of human exposure to hazardous gaseous contaminants in the atmosphere and in various air quality models.