Research Abstracts

Transport of uranyl ion from HCl medium was investigated using 0.2 micron PTFE filters as the membranesupport and 30% alamine 336 in toluene as the carrier while distilled water was used as the strippant. In an experimentcarried out to understand the effect of the organic diluents, the observed tren

This work focuses on a non-destructive process for recovering valuable aromatic fractions from odorous industry aqueous effluent. Non-dispersive extraction of ten selected aroma compound was carried out on very diluted model aqueous solutions, using membrane contactors, in two configurations: liquid

Concentration and/or space-dependent diffusional mass transport through a dense membrane were investigated. A quasi-analytical approach is given in order to calculate the concentration distribution in the membrane and the mass transfer rates in the case of a single component as well as of binary com

Crossflow microfiltration experiments were performed on aqueous dispersions of titanium dioxide through a 0.1 µm pore size ceramic membrane at various operating parameters. The initial transient flux decline follows dead-end filtration theory, with the membrane resistance determined from the initial

The influence of particle shape, ζ-potential and size with change of pH and ionic strength on permeate flux during the microfiltration of model dispersions (two different china clays with mean particle sizes of 3.5 µm and 1.5 µm) on flat sheet ceramic membranes (ZrO2, mean size of pores 0.2 µm) have

Studies were carried out on the treatment of water for potable purposes using ceramic and capillary membranes. The studies involved the processes of unit microfiltration and ultrafiltration as well as hybrid processes. In the hybrid processes, adsorption on activated carbon and membrane separation w

The efficiency of cross-flow microfiltration processes is limited by membrane fouling and concentration polarization leading to permeate flux decline during operation. The objective of this study was to investigate the influence of static turbulence promoter on permeate flux during skim milk microfi

An alternative method using established polymer processing and membrane formation processes to prepare hydrophilic membranes based on acid modified polyolefins is introduced. This process includes blend formation by reactive extrusion of functionalized polyolefins (polypropylene; PP) and a hydrophil

Cyproheptadine hydrochloride (C) shows an antihistaminic as well as antimuscarine, antiserotonic and sedative activity. The present work describes sensitive and reasonably selective poly(vinyl chloride) membrane electrodes for cyproheptadine. They are based on the use of cyproheptadine-tetrakis(4-ch

Alginite, mined at Pula (Hungary) is used as a model material. It has been originated from biomass of fossil algae during several millions of years in volcanic craters. Its organic material content is about 5–50%. It was fractionated by alkaline extraction. The solute pH was adjusted to 7, 5 and 2 r