Modification of polysulfone membranes with polyethylene glycol and lignosulfate: electrical characterization by impedance spectroscopy measurements

Dielectric analysis of nanofiltration membrane in electrolyte solutions: Influences of permittivity of wet membrane and volume charge density on ion permeability

“…Besides, in recent years, the studies by using dielectric spectroscopy or electrical impedance spectroscopy (EIS) have also been reported: Coster et al investigated the electrical properties of the fouled reverse osmosis membranes and BSA-fouling of ion-exchange membrane by EIS [14,15]; Benavente et al discussed the influence of modification of polysulfone membranes with polyethylene glycol and lignosulfate on the electrical properties of membrane [16]; Moon Seung Hyeon et al examined the fouling mechanism of a fouling layer formed by sodium dodecylbenzenesulfonate to ion exchange membranes [17]; Freger Viatcheslav et al characterized ion transport in thin film [18]. In our previous studies [19], an effective method to calculate the inner parameters in multi-membrane was proposed, and the method has been adapted to detect the structural and electrical properties of NF membrane [20].…”

Study of the electrical properties of bi-layer ion-exchange membrane systems

“…In practice [15][16][17][18][19][20][21], it is well known that certain membranes operate successfully at much higher concentrations of electrolyte than one would predict from a mean field estimate since there are ''bottlenecks" of high fixed-charge density inside the membrane. Also, one side of the membrane is usually modified with highly charged films to enhance the permselectivity.…”

Electrochemical impedance of ion-exchange membranes in asymmetric arrangements

“…In this figure, ÀZ i (x) is plotted against Z r (x) with the angular frequency, x, as a parameter increasing from the right to the left of the plot (Nyquist-type plot). These impedance plots are typical of ion-exchange membrane systems [15][16][17][18] and they show two regions: a geometric arc at high frequencies and a diffusional arc at low frequencies. In Fig.…”