Bubston structure of water and electrolyte aqueous solutions

This paper develops the theoretical concept of a bubston, a stable gas bubble that exists in pure water and in electrolyte water solutions in equilibrium with their gaseous environment. A theoretical model of ion adsorption on a water surface is constructed and used to quantitatively describe the do...

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Bibliographic Details
Published in:Physics Uspekhi 2016-01, Vol.59 (9), p.846-865
Main Authors: Bunkin, N F, Bunkin, F V
Format: Article
Language:English
Subjects:
Aqueous electrolytes
Clusters
double electric layer
Electrolytes
first-order phase transition
Helium
Ion concentration
ionic adsorption at the water surface
Mathematical models
Solubility
stable gas bubbles
Surface chemistry
thermodynamically equilibrium systems
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Summary:This paper develops the theoretical concept of a bubston, a stable gas bubble that exists in pure water and in electrolyte water solutions in equilibrium with their gaseous environment. A theoretical model of ion adsorption on a water surface is constructed and used to quantitatively describe the double electric layer that forms. These results also enable a thermodynamic description of a bubston structure in the water-gaseous environment system to be performed. It is shown that for certain temperatures and certain concentrations of dissolved impurity ions the emergence of such a structure is a first-order phase transition. The unique role of helium as a gaseous environment in the context under study is established: in this case, a bubston structure does not appear whatever the initial ion concentration, and the solubility of helium itself increases with increasing temperature. The mechanism of formation of experimentally observed bubston clusters is discussed.
ISSN:1063-7869
1468-4780
DOI:10.3367/UFNe.2016.05.037796