uv-induced grafting technique was used as a flexible method for surface modification of polysulfone (psf) ultrafiltration (uf) membranes in order to prepare hydrophilic nanofiltration (nf) membranes. flat sheet polysulfone (psf) ultrafiltration membranes were prepared via phase inversion method. n-methylene-2-pyrrolidone (nmp) and polyethylene glycol (peg) of three different molecular weights (...

Groundwater contamination by chlorinated hydrocarbons represents a particularly difficult separation to achieve and very little is published on the subject. In this paper, we explore potential for removal of volatile non-volatile organics from site in Bedfordshire UK. The compounds interest include trichloroethylene (TCE), tetrachloroethylene (PCE), cis-1,2-dichloroethylene (DCE), 2,2-dichlorop...

Background: Chitooligosaccharides (COS) with degrees of polymerization (DP) 6 to 8 are degraded from chitosan, which possess excellent bioactivities. However, technologies that could purify them from hydrolysis mixtures in the narrow DP range (984 to 1,306 Da) are absent. The objective of this research is to purify DP 6 to 8 COS by nanofiltration on the basis of appropriate adjustments of the f...

DESCRIPTION Carimune® NF, Nanofiltered, Immune Globulin Intravenous (Human), is a sterile, highly purified polyvalent antibody product containing in concentrated form all the IgG antibodies which regularly occur in the donor population.1 This immunoglobulin preparation is produced by cold alcohol fractionation from the plasma of US donors. Part of the fractionation may be performed by another U...

Graphene oxide (GO) is emerging as an excellent next generation material for water purification membranes. Its ability to be fabricated cost-effectively in large quantities and featured characteristics, such hydrophilicity, makes it equitable graphene alternative respective nanometric applications, including nanofiltration. In this study, the influence of key properties GO sheets, lateral size,...

Natural organic matter (NOM) complicates water treatment and causes formation of disinfection byproducts (DBPs). NOM is removed well by nanofiltration (NF) but extensive membrane fouling, especially in the presence divalent cations. This research investigated a hybrid electrodialysis-nanofiltration (ED–NF) system to treat freshwaters containing hardness NOM. ED removes most ions little no NOM, ...

In nanofiltration (NF), solution and membrane chemistry determine the charge density. multi-component electrolytes solutions, it is important to consider interaction between ions NF membranes. For instance, in presence of divalent ions, reversal can take place due counterions with charged functional groups membrane. This paper presents a model based on state-of-the-art mean-field theory that in...

Rapid increase in population and industrialization leads to huge generation of solid waste throughout the country with landfilling as the most common practice for management of these solid waste. It is estimated that out of 3267 MLD of sewage is generated in Delhi. Concentrations of COD, BOD5, heavy metals, NH4AN, low BOD5/COD ratio and the lack of nutrients in the methanogenic phase have restr...

Polymer-based membranes have advanced or novel functions in the various membrane separation processes for liquid and gaseous mixtures, such as gas separation, pervaporation (PV), reverse osmosis (RO), nanofiltration (NF), ultrafiltration (UF), microfiltration (MF), other critical applications of water purification, solvent concentration, recovery [...]