COLL 18 |
| Atmospheric aerosol particles, particularly in the submicron range, are now known to contain significant amounts of organic carbon. Many field studies suggest that a major fraction of organic carbon, found in atmospheric aerosols, is often water-soluble and humic-like in character. Humic materials are known, from studies in soil science, to form colloids or micelles in aqueous solutions. Thus, it is very likely for humic-like organic carbon to also exist in a colloid state in atmospheric aerosols. In this talk I will show, using laboratory measurements and field observations, how micelle formation in atmospheric aerosols can affect their hydroscopic growth, surface tension and refractive index. |
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Environmental Interfaces
8:30 AM-12:00 PM, Sunday, 10 September 2006 Sir Francis Drake -- Empire Room, Oral
Division of Colloid & Surface Chemistry |