Indicators of strong solute adsorption at container walls

Abstract

Arguments are advanced to suggest the usefulness of linear response theory for indicating the occurrence of strong physisorption at container walls. On this basis, it is concluded that strong solute adsorption occurs in dilute binary systems if either (i) the fluid is nearly critical or (ii) the solute atoms are larger and more attracted lo the walls than solvent atoms. The origin of the large effect observed for Cs atoms in liquid Na is tentatively explained through this size effect and a repulsion of the Na from chemisorbed surface layers.

Negative Gas−Solid Adsorption and Its Influence on Wettability

“…Thus, while all values of Γ throughout the course of the experiment may remain in the positive region, incremental adsorption is actuallynegative after Γ passes through the maximum. According to Henderson, the equation predicting possible negative adsorption in gas solid systems was first derived by Steele, then by others. − …”