This study focuses on mechanisms and application of the permeate in Micellar-Enhanced Ultrafiltration (MEUF) by using Foam Fractionation (FF). Sodium Dodecyl Sulfate (SDS) was applied as the surfactant. Effects of operation parameters on foam fractionation process were investigated systemically. The conditions of separation process were optimized. The selectivity of the foam fractionation of mixture ions was investigated. The effect of combined technique on separations was studied. In addition, mecha...