INFLUENCE UPON EFFUSION OF HYDROPHOBIC ORGANIC-COMPOUNDS (HOCS) FROM FOG DROPLETS - SURFACTANT, PH, AND SALT EFFECTS

Authors
Citation
Jha. Lo et Wmg. Lee, INFLUENCE UPON EFFUSION OF HYDROPHOBIC ORGANIC-COMPOUNDS (HOCS) FROM FOG DROPLETS - SURFACTANT, PH, AND SALT EFFECTS, Aerosol science and technology, 26(4), 1997, pp. 301-312
Citations number
25
Categorie Soggetti
Engineering, Mechanical","Environmental Sciences
ISSN journal
02786826
Volume
26
Issue
4
Year of publication
1997
Pages
301 - 312
Database
ISI
SICI code
0278-6826(1997)26:4<301:IUEOHO>2.0.ZU;2-#
Abstract
In this study, a HOCs-effusion reactor was constructed to investigate the effects of surfactant, pH, and salt concentration on the effusion of n-octane that we chose as a surrogate for hydrophobic organic compo unds (HOCs) in fog droplets. Sodium dodecyl sulfate (SDS) was selected as the surfactant for our experiments. In addition, a correction fact or a for the exchange constant of mass transfer of n-octane was define d and used to illustrate the effects mentioned above. The experimental results show that the values of cu are in the range of 0.421-0.798 fo r the effect of SDS. Thus, SDS can decrease the mass transfer of n-oct ane effused from the fog droplet by about 20-60%. However, the values of a vary from 1.17 to 1.57 and 1.42 to 4.23 for the effects of the H2 SO4 and NaCl. Therefore, ionic strength contributed by H2SO4 and NaCl can increase the effusion rate of n-octane by about 17 to 57% for the effect of H2SO4 and 42 to 323% for the effect of NaCl. (C) 1997 Americ an Association for Aerosol Research.