A mobile gas-water interface in electrolyte solutions

被引:55
作者
Henry, Christine L. [1 ]
Parkinson, Luke [2 ]
Ralston, John R. [2 ]
Craig, Vincent S. J. [1 ]
机构
[1] Australian Natl Univ, Dept Appl Math, Res Sch Phys Sci & Engn, Canberra, ACT 0200, Australia
[2] Univ S Australia, Ian Wark Res Inst, Mawson Lakes, SA 5095, Australia
关键词
D O I
10.1021/jp8067969
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
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 mu m, 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.
引用
收藏
页码:15094 / 15097
页数:4
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