期刊
ATMOSPHERIC ENVIRONMENT
卷 44, 期 3, 页码 329-337出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.atmosenv.2009.10.033
关键词
Organic aerosol; Cloud activation; Water-soluble organic carbon (WSOC); Humic substances
资金
- School of Earth Sciences discretionary funds at Stanford University
- National Science Foundation [ATM-0731451]
Surface tensions for a wide variety of pure organic and mixed organic/salt solutions were measured at 25 and 5 degrees C using the Wilhelmy plate method. Langmuir adsorption parameters for the organic compounds were extracted by fitting the surface tension data to the Szyszkowski equation. in a mixed organic/salt solution, the surface tension was primarily controlled by the organic component, even when the mass ratio of salt to organic in solution exceeded threefold. Excellent agreement was found between measured surface tension values at 5 degrees C and those predicted by the Szyszkowski equation using Langmuir adsorption parameters extracted at 25 degrees C. This finding may have important implications for cloud formation studies where the onset of activation often occurs at temperatures below 25 degrees C. (C) 2009 Elsevier Ltd. All rights reserved.
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