Browse > Article

The Reaction Efficiency and Surface Characteristics for Metallic Ions in Air Flotation Process  

Han, Moo-Young (서울대학교 지구환경시스템 공학부)
Dockko, Seok (우석대학교 환경신소재 공학부)
Kim, Young-Hwan (UNEP-SNU 빗물연구센터)
Publication Information
Journal of Korean Society of Water and Wastewater / v.18, no.2, 2004 , pp. 222-227 More about this Journal
Abstract
Flotation processes involve the use of very small bubbles (micro-bubbles) to separate particles from water. The process has become a good alternative to sedimentation, especially where the particles are small or of low density. Although the flotation process commences with a collision between particles and bubbles, most research has been focused only on the characteristics of the particles. In this paper, recent theoretical and experimental research on the characteristics of bubbles is summarized. The effect on the collision efficiency of the size and charge of bubbles is calculated through trajectory analysis. The size and charge of bubbles are measured under different conditions and the ramifications of the results are discussed. The results may lead to a better understanding and optimization of the existing process. In particular, we discuss an idea that a new advanced flotation process might be possible by the modification of the characteristics of the bubble alone or of both bubble and particle.
Keywords
Bubble size; bubble charge; DAF; electroflotation; flotation; trajectory analysis;
Citations & Related Records
연도 인용수 순위
  • Reference
1 Okada, K., Akagi, Y., Kogure M. and Yoshioka, N. (1990) Analysis of particle trajectories of small particles in flotation when the particles and bubbles are both charged. The Canadian Journal of Chemical Eng., 68, pp. 614-621
2 Han M.Y. and Dockko S. (1999) Zeta potential measurement of bubbles in DAF process and its effect on the removal efficiency, Water Supply: the review journal of the international water supply association, 17(34), pp. 177-182
3 Han, M. Y., (2002) 'Modeling of DAF: the effect of particle and bubble characteristics', AQUA, 51(1), pp. 27-34
4 Dockko, S., Han, M. Y., Park, C. H. (1998) Measuring Zetapotential of Microbubbles in DAF, J. of Korean Society of Water and Wastewater, 12(4), pp. 53-58
5 Han M.Y., Park Y.H. and Yu T.J. (2002) Development of new method of measuring bubble size, Wat. Sci. & Tech.: Water Supply, 2(2), pp. 77-83
6 Kubota K., Jameson G.J. (1993) A study of the electrophoretic mobilityof a very small inert gas bubble suspended in aqueous inorganic electrolytic and cationic surfactant solutions, J. of Chemical Eng. of Japan, 26(1)