On the scavenging of organic gases by cloud and raindrops: I. A theoretical and experimental study of acetaldehyde absorption and desorption for water drops in air |
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| Authors: | J H Topalian S Mitra D C Montague A Quintanar H R Pruppacher |
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| Institution: | (1) Department of Atmospheric Sciences, University of California, 90024 Los Angeles, CA, U.S.A. |
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| Abstract: | Our previously developed theoretical models for describing the rate at which water-soluble atmospheric trace gases are scavenged by cloud and rindrops were evaluated for the case of acetaldehyde being absorbed and desorbed by water drops of radii between 250 to 2500  m radius. The experimental verification of our theoretical predictions was carried out in the UCLA 33 m high precipitation shaft in which falling water drops were allowed to come to terminal velocity before passing through a chamber of variable lengths filled with air containing acetaldehyde at various partial pressures. For all drop sizes studied, the experimental results and the theoretical predictions were in reasonable agreement. |
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| Keywords: | Acetaldehyde Air pollution Pollution removal Scavenging Wet deposition |
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