Zeta potential of air bubbles conditioned with typical froth flotation reagents
International Journal of Mineral Processing(2015)
摘要
The effect of chemical flotation reagents on the zeta potential (ζ) of particles is well known, but their effect on bubbles is practically unknown. This study characterizes the ζ of air bubbles conditioned with typical froth flotation reagents and presents a novel experimental setup and method for estimating the electrophoretic velocity. It was observed that collectors strongly affect ζ in the following order from more to less anionic: xanthate, dithiophosphinate, deionized water, mercaptobenzothiazole and dodecylamine. By contrast, frothers affect ζ only slightly. In this study, it was also observed that pH affects the microbubble diameter and that under acidic or basic conditions, the bubble diameter decreases.
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关键词
Zeta potential,Microbubbles,Flotation reagents
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