Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6344553 | Journal of Aerosol Science | 2013 | 9 Pages |
Abstract
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 (0-0.5 mol/kg water) was added to ammonium sulfate (0.1-3 mol/kg water), d-glucose (0.01-2 mol/kg water), and NaHA (0.1-10 g/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 of oxalic/malonic acids in the solution, the surface tension increase by d-glucose becomes larger and the surface tension reduction by NaHA becomes smaller.
Related Topics
Physical Sciences and Engineering
Earth and Planetary Sciences
Atmospheric Science
Authors
Jae Young Lee, Lynn M. Hildemann,