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The Effect of Magnesium and Aluminium Ions on Zeta Potential of Bubbles  

Han, Moo-Young (서울대학교 지구환경시스템공학부)
Ahn, Hyun-Joo (서울대학교 지구환경시스템공학부)
Shin, Min-Seok ((주)에코프론티어)
Publication Information
Journal of Korean Society of Water and Wastewater / v.18, no.5, 2004 , pp. 573-579 More about this Journal
Abstract
Electroflotation, which is used as an alternative to sedimentation, is a separation treatment process that uses small bubbles to remove low-density particulates. Making allowances for recent collision efficiency diagram based on trajectory analysis, it is necessary to tailor zeta potential of bubbles that collide with negatively charged particles. In this paper, the study was performed to investigate the effects of magnesium and aluminium ions on zeta potential of bubbles. And, it was studied to find out factors which could affect the positively charged bubbles. Consequently, zeta potential of bubbles increased both with higher concentration of metal ions and in the acidic pH value. And, a probable principle that explained the procedure of charge reversal could be a combined mechanism with both specific adsorption of hydroxylated species and laying down of hydroxide precipitate. It also depended on the metal ion concentration in the solution to display its capacity to control the bubble surface.
Keywords
bubbles; charge reversal; electroflotation; multivalent metal; zeta potential;
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