Research Abstracts

Six different globular proteins were filtered with hydrophilic regenerated cellulose ultrafiltration membranes at their isoelectric points. The PLS regression was used to analyse the filtration data. The modelling of the relative flux failed, but that of the transmission of the proteins succeeded re

The streaming potential measured through the wall of a charged ceramic UF membrane is a relevant parameter to predict the retention properties of the considered membrane for ionic solutions. It is more satisfying than the electrophoretic measurement of the material particles used to prepare the memb

Adsorption isotherms and diffusion coefficients for light gases and butane isomers were measured for the transport pathways involved in gas permeation through H-ZSM-5 membranes by a transient permeation technique. The permeate responses to step changes in the feed were measured, and the transport wa

The aim of this study is the determination of the ionic distribution versus the spatial coordinates within the membrane polymers. The confocal Raman spectroscopy is a useful tool for the study because it allows investigation of the species nature within materials. The studied membrane is a AW from S

One of the principal purposes of transport characterization is obtaining input information for a predictive modelling of membrane performance. To be able to fit the model parameters in a unique way for a given feed composition, additional measurements other than single salt rejections are needed. Th

This work investigated the difference between membrane cut-offs measured with the CHARMME methods and the values quoted from the manufacturers. Four different membranes were characterised. The two regenerated cellulose membranes that according to the manufacturers had cut-offs of 5 and 10 kD had, in

This work deals with the selective demineralization of natural saltwaters by electrodialysis on specific membranes with the aim of preparing an “isotonic” water of blood plasma, i.e., of the same saline composition as blood, with potential applications in the field of health. Preliminary experiences

We have used electrodialysis for the separation of amino acids, mineral ions and sugars. It is an important problem at the last stages of biotechnological production of amino acids. We consider two effects that allow one to solve the problem of separations. The “barrier” effect makes it possible to

Organic acids are increasingly used for various industrial applications. Their production is mainly achieved by fermentation. Precipitation or extraction stages, which generates big amount of effluents, are then traditionally used to get the acid in a suitable form. Bipolar membrane electrodialysis

The purpose of this paper is to describe an experimental method developed to study the use of electrodialysis (ED) as a recycling process introduced within some operations in the surface treatment industry. The case study is acid picking before electroplating. The first step is the study and selecti