Research Abstracts

Permeation experiments of aqueous solutions of diprotic amino acids (L-glutamine and glycine) were carried out with numerous commercial polymeric nanofiltration (NF) and tight ultrafiltration (UF) membranes. The aim of this study was to determine the permeate flux and the amino acid rejection as a f

Equilibrium and transport properties of ion-exchange electrodialytic membranes before and after their processing in model solution containing dimethylacetamide were investigated in LiCl solutions. Values of the membranes transport structural parameters reflecting structural and kinetic characteristi

The chronopotentiometric study of the CMS membrane in contact with 0.05 M NaCl shows a chronopotentiometric response at over-limiting currents typical of homogeneous membranes. Based on the two-phase model, the fraction of the interstitial phase in presence of NaCl was determined from the conductivi

Textile industry processes (dyeing, bleaching, printing and finishing) require a high-water consumption generating high amounts of wastewater. According to the literature, typically 200 and 500 L of water are needed to produce 1 kg of finished product [1]. This fact in combination with the current w

The “adsorption Á amphoteric” model is used to investigate the role of the main phenomena determining the mechanism of the membrane charge formation in nanofiltration membranes. The prevailing mechanisms considered are: acid/base dissociation of the hydrophilic groups of the membrane, counter-ion si

Concentration and/or space-dependent diffusive and convective mass transport, through flat sheet, anisotropic membrane layer or membrane bioreactor through dense or porous membrane, were investigated. A quasi-analytical solution is presented in order to estimate the concentration distribution in the

A new class of multi-wall carbon nanotubes (MWCNTs)/carbon nanocomposite thin films was successfully prepared by incorporating (MWCNTs) into polyimide (PI) precursor solution. The carbon films were obtained in only one coating step by spin-coating technique on a macroporous alumina substrate and wer

Electrodialysis of manganese (II) containing solutions has been studied. It was shown that Mn (II) cations themselves do not render any negative impact on the ion-exchange membranes. These ions are highly movable within the cationite membrane phase and may be easily removed during the electrodialysi

For the first time the effect of essential shift of the overlimiting state potentials on the current Á voltage curves for the composite membranes PANI/MF-4SC has been observed. This effect is explained by morphology changes of initial membrane due to formation of interpolymeric complexes of electron

The goal of this research is to evaluate the potential of using membrane based solvent extraction for the recovery of vanillin obtained by bioconversion of ferulic acid in view of the on-line extraction from the bioconversion broth, thus coupling bioconversion and separation. The partition coefficie