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
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.