Results 201 to 210 of about 14,417 (244)

Electroviscous Effects in Ceramic Nanofiltration Membranes

ChemPhysChem, 2015
AbstractMembrane permeability and salt rejection of a γ‐alumina nanofiltration membrane were studied and modeled for different salt solutions. Salt rejection was predicted by using the Donnan‐steric pore model, in which the extended Nernst–Planck equation was applied to predict ion transport through the pores.
Farsi, Ali, Boffa, Vittorio, Christensen, Morten Lykkegaard; id_orcid 0000-0002-7671-817X   +2 more
openaire   +2 more sources

Polymer Nanocomposite Membranes for Antifouling Nanofiltration

Recent Patents on Nanotechnology, 2016
Fouling refers to the unwanted and undesirable attachment of biological macromolecules, inorganic, organic matter, and microorganisms on water contact surfaces. Fouling reduces the performance of devices involving these submerged surfaces and is considered the bottle-neck issue for various applications in the biomedical industry, food processing, and ...
Tahseen, Kamal, Nauman, Ali, Abbas A, Naseem, Sher B, Khan, Abdullah M, Asiri   +4 more
openaire   +2 more sources

Physico‐Chemical Characterization of Nanofiltration Membranes

ChemPhysChem, 2007
AbstractThis study presents a methodology for an in‐depth characterization of six representative commercial nanofiltration membranes. Laboratory‐made polyethersulfone membranes are included for reference. Besides the physical characterization [molecular weight cut‐off (MWCO), surface charge, roughness and hydrophobicity], the membranes are also studied
Katleen, Boussu, Jérémie, De Baerdemaeker, Charles, Dauwe, Marc, Weber, Kelvin G, Lynn, Diederik, Depla, Steliana, Aldea, Ivo F J, Vankelecom, Carlo, Vandecasteele, Bart, Van der Bruggen   +9 more
openaire   +2 more sources

Characteristics and Application of Ceramic Nanofiltration Membranes

Annals of the New York Academy of Sciences, 2003
Abstract: In this paper we report on the characteristic and filtration behavior of a newly developed ceramic nanofiltration membrane and compare it with other commercial ceramic nanofiltration membranes currently available. It is shown that it is possible to produce a ceramic membrane with separation properties in the nanofiltration range and with ...
Ralph, Weber, Horst, Chmiel, Valko, Mavrov   +2 more
openaire   +2 more sources

Concentration of Grape Must by Nanofiltration Membranes

Food and Bioproducts Processing, 2003
In this study the selectivity of two nanofiltration (NF) membranes was tested with the aim of increasing the sugar content of grape must used for wine production. The composition of grape must, concentrate, permeate and the rejection values for selected physicochemical parameters is presented.
Versari A., Ferrarini R., Parpinello G. P., Galassi S.   +3 more
openaire   +3 more sources

Evaluating the charge of nanofiltration membranes

Journal of Membrane Science, 2001
Abstract In this study, several methods were used to determine the charge of commercially available nanofiltration membranes, and were compared. First the ion-exchange capacity was determined by titration, this method is able to distinguish between positively and negatively charged functional groups on the membrane.
Johan Schaep, Carlo Vandecasteele
openaire   +1 more source

Performance of Nanofiltration Membranes in Ethanol

Separation Science and Technology, 2005
Abstract Several nanofiltration membranes were tested for flux and rejection of selected solutes in ethanol. The membranes were initially conditioned with pure solvent containing increasing concentrations of ethanol. Flux decreased with increase in ethanol concentration and increased at higher temperatures and pressures.
Jason Kwiatkowski, Munir Cheryan
openaire   +1 more source

Fouling and retention of nanofiltration membranes

Journal of Membrane Science, 1995
Abstract Nanofiltration membranes retain substances with molar masses higher than ∼300 g/mol and multivalent ions. The retention characteristics depend much on how much free volume there is in the membranes, which can for some membranes be related to the flux.
Marianne Nyström, Lena Kaipia, Susana Luque   +2 more
openaire   +1 more source

Separation potential of nanofiltration membranes

Desalination, 1990
Abstract Nanofiltration has two interesting features: 1. - a fractionation capacity for different organic components in aqueous solutions, the ‘cut-off’ being in the range of 300 kg/kmol molecular weight 2. - the potential of realizing the Donnan-effect with respect to anions of different valency.
R. Rautenbach, A. Gröschl
openaire   +1 more source

Microcystins removal by nanofiltration membranes

Separation and Purification Technology, 2005
Abstract Microcystins produced by cyanobacterial blooms have been extensively found in water reservoirs used for drinking water abstraction and many conventional water treatment technologies have been reported to be ineffective for removing them. Safe barriers against microcystins in drinking water, are therefore, needed.
M TEIXEIRA, M ROSA
openaire   +1 more source