Nanofiltration

All MSF desalination plants have been operated at a top brine temperature below 120°C. That is because of sulfate scaling phenomena, which usually occurs when the temperature is higher than 120°C. This type of scaling is hard scale that cannot be removed easily by chemical or mechanical cleaning. In

We report the results of experiments conducted under the well known ACS ED membrane, using the membrane potential technique, in order to obtain the transference numbers of Na+ and Br! before and after lengthy filtration studies using brackish waters from France and Senegal. With a change of the Br!

Our article deals with the possibilities to treat seawater using commercial nanofiltration polyamide membranes, denoted NF70 and NF 200, in order to elaborate usable salty aqueous solutions (from high concentrated solutions with total salinity around 70 g/L to isotonic solutions with total salinity

Nanofiltration (NF) membranes are a relatively new class of membranes which have properties in between those of ultrafiltration (UF) membranes and reverse-osmosis (RO) ones. Their separation mechanisms involve both steric (sieving) effects and electrical (Donnan) effects. The significance of this me

In this paper, the implications of the so-called optimized NF membrane properties on the economic assessment as well as the process performance of NF membrane system will be discussed. The predictive model for NF membranes such as the Donnan-steric-pore model has been used in conjunction with an eco

Thin film composite (TFC) co-polyamide membranes were modified by adding carboxyl group to the polypiperazinamide backbone. The sodium chloride, sodium sulphate, magnesium chloride and magnesium sulphate rejections were measured at various feed pressures for the modified and unmodified membranes. Th

The treatment of a rejection of tannery effluent was carried out on an organic nanofiltration membrane. The rejection was recovered from a leather manufacturing plant in the area of Algiers (Rouiba). The effluent of the bath of tanning and liming charged with chromium ions was the subject of this st

A mathematical model is proposed to predict the transfer mechanism of calcium salts through a nanofiltration membrane. The model is a combination of Nernst-Planck and film theory equations and it is characterized by three transport parameters: solute permeability Ps, reflection coefficient σ and fil

Cadmium is one of the main toxic pollutants generated by industrial activities. Many methods have been used to remove cadmium from wastewater issued from these industries. In the present study removal of cadmium Cd(II) ions from aqueous streams was investigated through a nanofiltration membrane proc

Membrane filtration is used for separating oil from water and treating waste metal-working fluids. This work presents two different filtration systems and investigates the possibility of reusing their permeates. The first system consists of an ultrafiltration membrane (UF) followed by a nanofiltrati