The effect of surfactants on oxygen mass-transfer through the air-water interface.
The aim of the current study was to investigate the oxygen transfer rate through the water-air interface in the presence of different concentrations of various surfactants. The surfactants used in the current study were methanol, ethanol, 1-propanol and 1-butanol. The measurements were performed with an apparatus based on the electrochemical oxygen sensor. Theresults obtained showed that the impediment to oxygen mass-transfer through the water-air interface depends on the molecular structure and concentration of the surfactant used. A simple mathematical model was proposed, which allowed us to calculate the characteristic constants of surfactants--K' and deltak starting from the experimental results. K' is the reciprocal of the equilibrium constant of adsorption process and deltak characterizes the influence of the surfactant to oxygen mass-transfer through the air-water interface.
Mölder
Erik
E
Institute of Physical Chemistry, University of Tartu, Jakobi 2, EE-51014 Tartu, Estonia.
Tenno
Toomas
T
Mashirin
Aleksei
A
D000327:Adsorption; D000388:Air; D007700:Kinetics; D008962:Models, Theoretical; D010100:Oxygen / Q000737:chemistry*; D013501:Surface-Active Agents / Q000737:chemistry*; D014867:Water
D013501:Surface-Active Agents; D014867:Water; D010100:Oxygen