Research Abstracts

The phase inversion technique was used in this study to prepare polyethersulfone membranes. After optimizing the synthesis factors, like the relative air humidity, the concentration of the polymer and the used solvent, nanoporous membranes were obtained. Characterization of these membranes indicated

The problems involved in the environment for a surface treatment are especially at the level of water and even dangerous often toxic waste for the environment. The purpose of the surface treatments is to make acquire on metal or plastic surfaces new properties by a surface dressing of material. In t

From the preliminary results it can be concluded that reverse osmosis is an effective process to produce non-alcoholic beer, with ethanol values below 0.5% by volume. The most critical parameters in the membrane process have been studied and it can be concluded that the most promising conditions for

Permeate pressure (mbar) Fig. 2. Effect of permeate pressure on PSI: (30 wt.% methanol; 35°C).

The influence of the absorbent and the membrane on selectivity of the separation process was studied. It was shown that it is possible to achieve a high degree of ammonia purification from most of the impurities by the absorption pervaporation method.

The study was aimed at removing organic solvents from aqueous solutions using pervaporation. The tests were carried out on a composite polydimethylsiloxane (PDMS) membrane manufactured by GKSS/ Forschungszentrum Geesthacht, Germany and a polydimethylsiloxane membrane filled with carbon black (PDMS +

The prediction of binary and multicomponent fluxes through a microporous silica membrane from the pure component fluxes through the membrane is not straightforward. Although for small concentration intervals, concentration effects are neglected they must in fact always be taken into account.