Membrane

The high purification of gases from easily penetrating impurities by a cascade of a continuous membrane column type has been investigated experimentally and theoretically. The equations for the separation power of cascades in the case of high purification of gases from low level impurities has been

Zeolite A membranes have been synthesised by secondary growth on the surface of macroporous "-alumina and stainless steel tubular supports, previously seeded with zeolite A crystals. The membranes thus obtained were used in the separation of H2/N2 and H2/C3H8 mixtures. Stainless steel supports appea

A review of works resulting in development of a hierarchic system of mathematical models is presented. Different scales of ion transport are considered: 1) in the membrane, where two approaches are used, the irreversible thermodynamics and modelling of the membrane material, the last permits to link

Separation of benzene and cyclohexane by a NaY zeolite membrane was studied via grand canonical molecular dynamics (GCMD). The GCMD technique was recently developed by simulation methods and effective for the study of the membrane separation process at the molecular level since it can simulate the d

The water state in the CaSO4 solutions where concentrations ranged from 0.68–7.08 g/l was studied by the differential-scanning calorimetry. In the low-temperature range, 248.8 K, a peak was detected at the beginning of a CaSO4 concentration of 1.7 g/l. Its appearance could be attributed to an initia

The adsorption of trace contaminants on natural particles is of great interest as this adsorption enhances the possibility of removing these with low pressure filtration such as MF and UF. This study shows that natural hormones such as estrone and estradiol will adsorb to natural particles both orga

The primary objective of the study described in the present paper was to investigate the problem of how the concentration of organic matter (expressed as dissolved organic carbon, DOC) contributes to the efficiency of separating atrazine form aqueous solutions by ultrafiltration. Another objective w

In Tenerife, Canary Islands, a complex infrastructure exists, whose aim is the reuse of wastewater for crop irrigation. For this reason, techniques of advanced treatment, such as micro-ultrafiltration, have been developed. A laboratory-scale study was carried out to evaluate the feasibility of a com

Nowadays, treatment of vinasse from the alcohol fermentation is a major cost centre which decides the economic viability of this traditional industry. Increasingly stringent environment norms in France have put enormous pressure on manufacturers of alcohol from traditional feedstock like beet molass

A temperature stimuli-responsive polymer, poly(N-isopropylacrylamide) (PNIPAAm), has been grafted into tubular-type porous polyethylene (PE) membranes by the plasma-induced graft polymerization technique. A wide range of grafting was achieved by varying grafting conditions such as monomer concentrat