Abstract
Various separation methods utilizing bubbles are briefly reviewed. The basic principles of ore flotation for several minerals such as sulfides, oxides, silicates and soluble salts are outlined. Problems associated with fine particles flotation are discussed in connection with the separation between hematite and silica. An example of the application to municipal weste treatment is also included. Some of the experimental results concerning ion flotation, precipitate flotation, adsorbing particle flotation and microflotation, as applied to water treatment are presented. Attachment between particles and bubbles are discussed, in which particular attention is given to the dynamic double-layer effect around moving bubbles and adsorbed layer effect.
