BUBBLE COALESCENCE AND GAS TRANSFER IN AQUEOUS ELECTROLYTIC SOLUTIONS
BUBBLE COALESCENCE AND GAS TRANSFER IN AQUEOUS ELECTROLYTIC SOLUTIONS
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DOI：
10.1021/i160038a012
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发表时间：
1971-01-01
期刊：
影响因子：
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通讯作者：
ZIEMINSKI, SA
中科院分区：
文献类型：
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作者：
LESSARD, RR;ZIEMINSKI, SA
各种无机盐对气泡聚结和质量传递速率的影响是化学工程师和那些从事污染盐水沃茨的人感兴趣的（Gurnham，1965）。Zieminski和Whittemore（1971）进行的试验表明，足够高浓度的电解质溶液减少气泡聚结，通过扩大接触表面而增加气体传递速率。这表明了一种通过将空气引入高盐浓度区域来提高含盐沃茨中曝气效率的潜在方法。然而，在文献检索中，人们发现，在确定溶解离子对这种类型的系统的影响方面，几乎没有做过基础工作。虽然表面活性剂对水界面现象的影响已经进行了相当详细的研究（Carver，1956; Mancy和Okun，1965; Zieminski等人，1960; Zie-minski等人，一九六七年; Zieminski和Hill，1962; Zieminski和Lessard，1969），气泡聚结程度对离子电荷的依赖性仍然不清楚，电解质对气体传递阻力的影响实际上还没有探索。任何一个观察过从海上冲上岸的波浪的人，一定会有意识地或不自觉地对这种波浪与淡水中类似的波浪相比所具有的“泡沫性”留下深刻的印象。这种现象归因于海水的高含盐量，是由破碎波捕获的气泡合并减少引起的。在纯水中，
The effects various inorganic salts exert on the coalescence of gas bubbles and on the rate of mass transfer are of interest to the chemical engineer as well as to those engaged in the treat-ment of polluted saline waters (Gurnham, 1965). Tests performed by Zieminski and Whittemore (1971) show that the reduction of bubble coalescence afforded by electrolyte solu-tions of sufficiently high concentration leads to an increased gas-transfer rate by enlarging the contact surface. This indicates a potential means of increasing aeration efficiency in saline waters byintroducing air into regions of higher salt concentration. In searching the literature, however, one finds that very little basic work has been done in determining the effects of dissolved ions on this type ofsystem. Though the effects of surface-active agents on aqueous interfacial phe-nomena have been studied in considerable detail (Carver, 1956; Mancy and Okun, 1965; Zieminski, et al., 1960; Zie-minski, et al., 1967; Zieminski and Hill, 1962; Zieminski and Lessard, 1969), the dependence of the degree of bubble coales-cence on ionic charge remains unclear and the effects of elec-trolytes on the resistance to gas transfer are practically un-explored.Coalescence Phenomenon in Ionic Solution. Anyone who has watched a wave coming ontoshore from the sea must certainly have been impressed, either consciously or otherwise, by the “foaminess” which such a wave possesses as compared to a similar wave in freshwater. This phe-nomenon, attributable to the high salt content of sea water, is caused by the decreased coalescence of air bubbles trapped by a breaking wave. In pure water, gas bubbles which