Foam Fractionation under Total Reflux. Recovery and Concentration of Ionic Species from Aqueous Solution.

ADSORPTIVE BUBBLE SEPARATION METHODS—Foam Fractionation and Allied Techniques

“…Mechanical methods for collapsing foam include slowly rotating perforated centrifuges (85) which can be improved by discharging aqueous foamate on to Teflon instead of glass (58); running foamate on to the foam in order to break it (75) (which works if the foam stability is not too high); discharging the foam on to a rotating disk (38); applying sonic or ultrasonic vibration ; and other means (38). Where thermal degradation is not a problem, it may be convenient to break the foam by passing it through a short conduit surrounded by a steam or hot water jacket (74,77). Chemical methods of foam breaking (772) may be employed, but obviously they are generally not desirable for producing reflux.…”

“…The separation from water of the anionic surfactant Aresket 300 (74), the nonionic surfactant Triton X-100 (67) [as corrected (55)], the cationic surfactant ethylhexadecyldimethylammonium bromide (57, 747) at various temperatures (44) in the presence of inorganic acids and bases (45), and other surfactants (49,57) have been studied. The last-named surfactant has been used to remove orthophosphate with optimum results at a pH of 8 to 9 (46), to remove phenol with optimum results at a pH of 11.6 (47), and to remove dichromate (52, 56).…”

Adsorption of Hemoglobin and Casein onto Air Bubbles

“…Recently, however, the nethod seems to find its way of application o an industrial sewage treatment. Removals )f metal ions [2][3][4][5][6][7][8] and detergents [9][10][11][12][13][14] from , , vaste liquors are two examples for which lpplication of froth flotation is most extenively studied. Sewages from food industry, m the other hand, contain such potential eed materials as proteins, lipids, fatty acids, md carbohydrates.…”