Recovery of surfactant SDS and Cd2+ from permeate in MEUF using a continuous foam fractionator

Micellar-enhanced ultrafiltration of cadmium and methylene blue in synthetic wastewater using SDS

“…The micellar solution is then passed through an ultrafiltration membrane with pore sizes small enough to reject micelles containing the attracted metal ions or/and solubilized organic solutes. As a result, permeate will contain little unattracted metal ions or organic molecules and surfactant monomers, which can be recycled or discarded with foam fractionation [27]. Theoretically, as mentioned above, micelles act on metal ions and organics in different locations.…”

Recovery of Isoflavones from the Soy Whey Wastewater Using Two-Stage Batch Foam Fractionation

“…The decrease of viscosity in the interstitial liquid between the bubbles accelerated foam drainage and, thus, contributed to improving the enrichment ratio. 22 The foam properties of the soy whey wastewater were characterized by the foaming ability and the foam stability. From Table 1, with the increase of temperature, the foaming ability increased and the foam stability decreased.…”

Removal of color from textile dyeing wastewater by foam separation

“…Materials that are not surface-active can also be separated using surfactant, which is called a collector [11]. Foam separation has been used as an effective and low-cost method for wastewater treatment and has been widely applied to the removal of proteins [12,13], organic materials [14], and metal ions [15,16]. This technique has also been applied to the removal of dyes.…”