A mobile gas-water interface in electrolyte solutions

Christine L. Henry; Lake Parkinson; John R. Ralston; Vincent S.J. Craig

doi:10.1021/jp8067969

A mobile gas-water interface in electrolyte solutions

Christine L. Henry, Lake Parkinson, John R. Ralston, Vincent S.J. Craig

Research output: Contribution to journal › Article › peer-review

57 Citations (Scopus)

Abstract

The effect of a range of electrolytes on the mobility of the gas-aqueous solution interface has been investigated By measuring the terminal rise velocity of small bubbles (diameter < 100 μn, Re < 1 ) in electrolyte solutions devoid of surface active contaminants, we determined that they obey the Hadamard-Rybczynski model, corresponding to a mobile interface (slip boundary condition), in agreement with observations in pure water. In addition, there is no difference in the interfacial mobility between electrolytes that inhibit bubble coalescence relative to pure water and electrolytes that have no effect This is strong evidence against the hypothesis that electrolytes inhibit bubble coalescence via immobilization of the interface in the absence of surface-active contaminants.

Original language	English
Pages (from-to)	15094-15097
Number of pages	4
Journal	Journal of Physical Chemistry C
Volume	112
Issue number	39
DOIs	https://doi.org/10.1021/jp8067969
Publication status	Published - 2 Oct 2008

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AU - Henry, Christine L.

AU - Parkinson, Lake

AU - Ralston, John R.

AU - Craig, Vincent S.J.

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Y1 - 2008/10/2

N2 - The effect of a range of electrolytes on the mobility of the gas-aqueous solution interface has been investigated By measuring the terminal rise velocity of small bubbles (diameter < 100 μn, Re < 1 ) in electrolyte solutions devoid of surface active contaminants, we determined that they obey the Hadamard-Rybczynski model, corresponding to a mobile interface (slip boundary condition), in agreement with observations in pure water. In addition, there is no difference in the interfacial mobility between electrolytes that inhibit bubble coalescence relative to pure water and electrolytes that have no effect This is strong evidence against the hypothesis that electrolytes inhibit bubble coalescence via immobilization of the interface in the absence of surface-active contaminants.

AB - The effect of a range of electrolytes on the mobility of the gas-aqueous solution interface has been investigated By measuring the terminal rise velocity of small bubbles (diameter < 100 μn, Re < 1 ) in electrolyte solutions devoid of surface active contaminants, we determined that they obey the Hadamard-Rybczynski model, corresponding to a mobile interface (slip boundary condition), in agreement with observations in pure water. In addition, there is no difference in the interfacial mobility between electrolytes that inhibit bubble coalescence relative to pure water and electrolytes that have no effect This is strong evidence against the hypothesis that electrolytes inhibit bubble coalescence via immobilization of the interface in the absence of surface-active contaminants.

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U2 - 10.1021/jp8067969

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VL - 112

SP - 15094

EP - 15097

JO - Journal of Physical Chemistry C

JF - Journal of Physical Chemistry C

IS - 39

ER -

A mobile gas-water interface in electrolyte solutions

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