Research Abstracts

Supported liquid membranes (SLMs) have demonstrated all along the years very high selectivity in facilitated transport of metal ions, however, they have some well known limitations, such as the gradual loss of the organic phase to the aqueous solutions. This paper describes two different types of no

Spontaneous reduction of 4-nitrobenzene diazonium salt on coal in acetonitrile or HCl aqueous solution permits the strong bonding of aryl groups to its surface as shown by IR spectroscopy. Heterogeneous reverse osmosis membranes containing small particles of coal modified with aryldiazonium salts we

Based on experimental data, a simulation and optimisation of the adsorption Á microfiltration (AMF) process for boron removal from reverse osmosis (RO) permeate was done. An impressively low flow rate of the dry boron adsorbent of about only 54.3 kg h(1 is needed in the adsorbent recirculation loop

Suspensions of a microparticulate boron adsorbent Dowex XUS can be effectively concentrated by microfiltration (MF) to relatively high concentrations of about 24 mass% of dry adsorbent. This is important for formation of a hybrid process combining adsorption or ion-exchange and MF. A tubular ceramic

Suspensions of a microparticulate boron adsorbent can be effectively concentrated to relatively high concentrations of about 11 mass% by microfiltration in aerated submerged modules using hydrophilic capillary and hydrophobic polypropylene hollow fibre membranes. With the increasing trans-membrane p

The gas and vapor transport into films of Hyflon† Ion H, a short-side-chain perfluorosulfonic acid ionomeric (PFSI) membrane, suitable for use in proton exchange membrane fuel cells (PEMFC), has been studied at various temperatures (358C, 508C, and 658C). The permeability and diffusivity values of H

The concentration of pretreated blackcurrant (Ribes nigrum L.) juice by reverse osmosis (RO) membrane was investigated in this study. The pretreatment steps were crushing, enzyme dosage, pressing and then clarification of the raw juice by ultrafiltration (UF). Polyethersulphone, tubular UF membrane

Membrane reactors could serve as a tool for enzyme-catalyzed reactions and they enable the performance of catalytic reaction, enzyme recovery and product isolation as a one-step process. In the presented work, the use of continuous flat-shape and continuous tubular membrane enzymatic reactors for di

Modified poly(ether ether ketone) (PEEKWC) and polysulphone (PSU) hollow fibre (HF) membranes were prepared via dry-wet spinning technique through the phase inversion process and characterised by pure water permeability, dextran rejection and scanning electron microscopy (SEM). The performance of th

In this paper, nanofiltration (NF) combined with continuous variable volume diafiltration (CVVD) of cottage cheese whey (also known as acid whey) was investigated to simultaneously concentrate and partially demineralize it. The experiments were carried out in a laboratory NF equipment using a flat s