ABSTRACT
Surfactants are often used to suppress or depress evaporation from a free liquid surface [13]. Surfactant monolayers formed on the water surface provide a barrier that molecules must overcome to transfer into the vapor from liquid phase. This is a kinetic effect that results in a decrease in vapor pressure ∆p over an evaporating water surface covered with a surfactant adsorption layer. In the state of equilibrium, the vapor pressure is equal to that of saturated vapor over the surfactant solution. At low concentration of surfactant molecules in the bulk solution this pressure is practically the same as for pure water, ps.
