Ultrafiltration behavior of a new type of non-ionic surfactant around the CMC

Membrane technology for the recovery of detergent compounds: A review

“…The nonionic permeate flux was even higher than that of pure water due to the interaction between the hydrophobic chain of the surfactant molecules and the non-polar sites of the membrane, leading to hydrophilization of the membrane surface and the pores. Similar results have been reported for nonionic surfactants [33][34][35][36]. Nevertheless, SDS presented a higher retention than Tergitol NP-9, probably due to the presieving effect of the electrostatic repulsion between the negatively charged micelles formed in the polarization layer as the feed concentration increased.…”

Structural Stability of Light-harvesting Protein LH2 Adsorbed on Mesoporous Silica Supports

“…In the ternary LH2-LDAO-water system, it has been reported that the aggregation of LH2 occurs when the concentration of LDAO is lower than the critical micelle concentration (CMC) of LDAO. 20 Since the CMC of LDAO in water was reported to be 0.028 wt% at 298 K, 21 the concentration of LDAO was tuned to 0.046 -0.19 wt%. When the concentrations of LDAO were 0.09 -0.19 wt%, the peak intensities of B800 and B850 were almost the same at 273 K, and a significant decrease and blueshift of the B850 band were induced by temperature elevation (Figs.…”

Treatment of Aqueous Ionic Surfactant Solutions by Dynamic Ultrafiltration

“…In addition, ultrafiltration (UF) is well-suited for recovery of organic compounds. The recent development of new membranes with specific properties has opened the way to surfactant reduction in liquid wastes (3)(4)(5)(6). However, the efficiency of conventional crossflow-filtration is limited by severe concentration polarization due to physicochemical interactions with the membrane.…”