Research of oxygen mass transfer through the air–water surface at low bulk concentrations of surfactants

E Mölder, T Tenno, T Tenno
2009 Proceedings of the Estonian Academy of Sciences  
Oxygen transfer from the gaseous to the liquid phase is often technologically a very energy-consuming process. We studied the influence of small alcohol molecules (1-butanol, 2-butanol, 2-methyl-propanol, and 2-methyl-2-propanol) as surfactants to oxygen permeability and addressed the importance of experimental methodology. The oxygen mass transfer rate in the air-water surface layer was calculated by using an original technique and the results were compared to the surface tension values
more » ... nsion values obtained by the Du Nouy ring method. Our experiments revealed that oxygen permeability was inhibited already at very low surfactant concentrations (0.1-1 mmol/L), whereas a considerable increase in the surface tension was observed in a 1000-fold higher concentration range. These results demonstrate the importance of methodological considerations in the research of surface action of surfactants.
doi:10.3176/proc.2009.2.05 fatcat:r2gs6hjtgveefftutktatwpzhu