Title

Condensation Nuclei Activation or Deactivation by Deposited Insoluble Particles

Abstract

Laboratory experiments have been performed in order to determine to what extent the deposition of, e.g. carbon particles doped by ethyl disulfide can affect the activation of well defined pure condensation nuclei such as sodium chloride and to study the way in which the carbon particles are distributed within the solution droplets. A significant effect was found for NaCl nuclei (dry particle diameter D = 0.425 μm) after several hours of exposure to the carbon aerosol (Dc = 0.05-0.07 μm) generated by a blowtorch. The critical supersaturation of sodium chloride with deposited doped carbon particles was slightly lowered in all samples. Analysis of micrographs shows that carbon particles are deposited on the droplet surface and in the core as well. A simple model of a droplet with insoluble deposited particles is suggested.

Department(s)

Physics

Second Department

Chemistry

Keywords and Phrases

Carbon; Meteorology--Clouds; Sodium Chloride; Condensation Nuclei Activation; Doped Carbon Particles; Droplets; Ethyl Disulfide; Aerosols; Disulfide; Scavenger; Airborne Particle; Dry Deposition; Fog; Haze; Laboratory; Solubility

International Standard Serial Number (ISSN)

0960-1686

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 1991 Elsevier, All rights reserved.

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