Lee, Jae Young; Hildemann, Lynn M
Surface tension of solutions containing dicarboxylic acids with ammonium sulfate, d-glucose, or humic acid
Teil von
  • Journal of aerosol science, October 2013, Vol.64, pp.94-102
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To examine the effect of organic/inorganic solutes on the properties of cloud condensation nuclei and other atmospheric aerosols, the surface tension of various mixtures including dicarboxylic acids, ammonium sulfate, d-glucose, and humic acid sodium salt (NaHA) was measured at 20°C using the Wilhelmy plate method. An equimolar mixture of oxalic/malonic acids (0–0.5mol/kg water) was added to ammonium sulfate (0.1–3mol/kg water), d-glucose (0.01–2mol/kg water), and NaHA (0.1–10g/kg water) solutions. The surface tensions of ammonium sulfate, d-glucose, and NaHA solutions decreased as the concentration of the added oxalic/malonic acid mixture increased. The trend in surface tension for the ammonium sulfate solution is roughly similar with and without the addition of the oxalic/malonic acid mixture. However, the surface tension trend for the d-glucose and NaHA solutions with the oxalic/malonic acid mixtures does not follow that of pure d-glucose and NaHA solutions. With the presence...
ISSN: 0021-8502
ISSN: 1879-1964
DOI: 10.1016/j.jaerosci.2013.06.004

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