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Non-isothermal effects on SO2 absorption by water droplets. I - Model development. II - Results and discussionAn analytic model of SO2 absorption in a falling water droplet is developed and a simulation of SO2 washout is performed. Nonisothermic effects on drop growth, droplet physical parameters, reaction rates, and multicomponent diffusion are treated in the model. The gas-liquid interface is assumed to be at equilibrium, and interfacial resistance is negligible. Raindrops are simulated as falling from a 2 km height through an atmospheric region containing SO2. The droplets decrease in size from evaporation and cooling, and their slightly basic pH aids SO2 absorption. The simulation indicates higher SO2 absorption at higher altitudes, and desorption may occur at ground level. Isothermal effects are concluded to be significant, and quantification of effects will depend on further modelling.
Document ID
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Reda, M.
(Iowa Univ. Iowa City, IA, United States)
Carmichael, G. R.
(Iowa, University Iowa City, IA, United States)
Date Acquired
August 10, 2013
Publication Date
January 1, 1982
Publication Information
Publication: Atmospheric Environment
Volume: 16
Issue: 1, 19
Subject Category
Environment Pollution
Accession Number
Funding Number(s)
Distribution Limits

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