This paper presents the development of a model for evaluating adsorbable organic halogens’ (AOX) removal efficiency during wastewater treatment by using the micellar-enhanced ultrafiltration (MEUF) technique. Surfactants can form larger aggregates (micelles) were prepared into which AOXs dissolve and are then retained by the membrane. Synthetic wastewater samples containing certain concentratio...

Some surfactants widely used as additives in food, pharmaceuticals, and cosmetic formulations are susceptible to peroxidation resulting in accumulation of hydroperoxides (HP). Our investigation was aimed to study the possible influence of different surfactants on the proportionality and reproducibility of the ferrous oxidation-xylenol orange method developed originally for the determination of ...

A simple method was developed for the reversible and selective modification of metallic and large diameter semiconducting SWCNTs in [BMIM]PF(6) ionic liquids by adding certain anion surfactants. The electronic band structure of SWCNTs can be controlled and tuned over a range by varying the surfactants used and their concentrations. A charge transfer "cation- product operator" complex model was ...

A straightforward flow injection method for the tensammetric determination of surfactants is described. The flow-through cell is equipped with a mercury-coated gold electrode as the working electrode. Ionic as well as nonionic surfactants can be determined in the concentration range 10~5-104 M. The calibration graph is not linear but with an approximation by a polynomial or a cubic spline funct...

[structure: see text] A hybrid foldamer constructed from six cholate units and two methionines was labeled with a DANSYL (DNS) group. The foldamer was solubilized by surfactant micelles to allow its usage as a fluorescent sensor for mercury ions present in the micromolar range in aqueous solutions. Its sensitivity was largely independent of the concentration of nonionic surfactants but was stro...

The association of many classes of surface-active molecules into micellar aggregates is a well-known phenomenon. Micelles are in dynamic equilibrium, constantly disintegrating and reforming. This relaxation process is characterized by the slow micellar relaxation time constant, tau(2), which is directly related to the micellar stability. Theories of the kinetics of micelle formation and disinte...

Microemulsions (μe) with water and a hydrophobic ionic liquid (IL) usually require 45-60 wt% surfactant to solubilize equal amounts of water and IL. To increase the efficiency we designed a new class of surfactants by combining a hydrophilic but IL-ophobic carbohydrate-based part with a hydrophobic but IL-ophilic IL-based part. These surfactants allow formulating microemulsions with 20 wt% surf...

The interaction of non-ionic surfactants in aqueous solutions containing some acid dyes has been studied spectrophotometrically. The spectral shift suggests that interaction decreases with increase in sulfonic acid grpup and increases. with ~crease in the hydrophobic character of the dye molecule as well as with increase in the number of ethylene oXIde umt of the surfactants, The results are ex...