Research Abstracts

Separation of benzene and cyclohexane is one of the most challenging processes in the chemical industry. In our previous paper, we examined the separation of a mixed solution of benzene and cyclohexane using a supported liquid membrane (SLM) based on ionic liquids. In this study, vapor permeation (V

A short review of the different approaches to the mechanism of oscillations of electric potential difference between aqueous phases of liquid membrane oscillators is presented. More attention is paid to the mechanisms of oscillations proposed in our laboratory. For systems with cationic surfactant a

Experimental results on permeate flux decline with time obtained from ultrafiltration tests were compared with those predicted by means of Song and Elimelech’s model. Feed solutions consisted of aqueous solutions containing 15 g/L of polyethylene glycol 35 kg/mol. All model parameters were theoretic

Electrical conductivity of flexible strongly acidic resin loaded with Cr (III) was investigated with an impedance spectroscopy method. The purpose of the work was to estimate the influence of hydrostatic pressure drop on the conductivity of the ion-exchanger bed, which had been compacted previously.

Pervaporation separation properties of water Á butan-1-ol binary mixtures were measured with the use of three supported liquid membranes at 378C, namely PDMS, 1-ethenyl-3-ethyl-imidazolium hexafluorophosphate Á PDMS, and tetrapropyl-ammonium tetracyanoborate Á PDMS membranes. An ultrafiltration cera

A method of obtaining membranes with a developed inner wall structure has been worked-out by establishing appropriate spinning conditions. Obtaining a developed surface of membranes without interference into the spinneret structure is feasible. Membranes with a developed inner surface bear higher ul

The effectiveness of different pretreatment on the fouling propensity of the feed was studied using synthetic wastewater. The fouling potential of the feed was characterized by the standard modified fouling index (MFI) and cross-flow sampler modified fouling index (CFS–MFI). In CFS–MFI, a cross-flow

The main purpose of this study is to evaluate a combined ozone and microfiltration (MF) membrane process as pre-treatment of a seawater reverse osmosis (SWRO) system. During the filtration of seawater (SW) with the MF membranes, membrane fouling on both hydrophilic (PHI) and hydrophobic (PHO) MF mem

The effects of low temperature on coagulation kinetics and floc surface morphology were examined in this study. The results show that low temperature slowed down the coagulation process as reflected in the decrease in aggregation rate and rate constants. The aggregation constant in the coagulation p