Membrane

The feasibility in the use of a sodium dodecyl sulfate anionic surfactant and nonionic monoalkylphenol polyetoxilate to purify contaminated waters of Ni(II) ions has been studied. Both the retention coefficients and the transmembrane fluxes have been determined at purification of the different syste

Membrane permeation combined with complexation was tested for radioactive wastes processing purpose. The ceramic membranes MEMBRALOX® and CéRAM INSIDE® were used. To enhance the UF separation effect, different soluble polymers and ferrocyanides, binding cobalt and caesium ions were used. The complex

As a new solvent free method for membrane formation, we have investigated the foaming of high-Tg polymers. We report two different routes for the formation of open-microcellular and open-nanoporous membrane morphologies. Porosity is introduced by expansion of carbon dioxide saturated films and hollo

Ultrafiltration is an ideal pretreatment method for reverse osmosis because it allows removing suspended solids and colloidal materials completely and reliably without chemicals. This paper introduces the ZeeWeed 1000 immersed membrane and its application for seawater ultrafiltration. ZeeWeed 1000

Membrane fouling is a frequent problem in most seawater reverse osmosis units, particularly when raw water is drawn from an open sea intake. Membranes tend to foul slowly, which makes it necessary to perform periodic cleanings with physical and chemical products, which in turn produce a decrease in

Micellar-enhanced ultrafiltration (MEUF) of chromate anions (CrO42–) from aqueous streams has been studied at 30°C using twice cationic surfactants (cetyltrimethylammonium bromide and cetylpyridinium chloride). The solution is processed by ultrafiltration, using a membrane with pore sizes small enou

The paper presents the latest developments and field experiences made with the large area, high rejection FilmTec** SW30HR-380 and SW30HR-320 membrane elements and focuses on technical-economical considerations with special emphasis on energy consumption and possible operational savings. Fouling in

This study was conducted to evaluate the applicability of microfiltration in treating domestic wastewater for reuse. A hollow fiber microfiltration membrane was used in the pilot test. The pore size of the membrane was 0.1 m and effective surface area was 20 m2. The maximum capacity of the pilot pla

Among the desalination technologies available, reverse osmosis is currently considered as the most economical process. However, while RO membranes have been continuously improved over the years, they have had one major shortcoming; the susceptibility to fouling. Indeed, it appears that RO technology