Positively charged nanofiltration (NF) membranes via UV grafting on sulfonated polyphenylenesulfone (sPPSU) for effective removal of textile dyes from wastewater

Fabrication and characterization of poly(phenylene ether-ether sulfone) based nanofiltration membranes modified by titanium dioxide nanoparticles for water desalination

“…3. Na 2 SO 4 rejection of membranes changed in different dosages of TiO 2 nanoparticles in casting solution. The increase of pore size and decrease of top layer thickness have negative effects on the membrane separation efficiency, whereas pore plugging by nanoparticles show positive effect in this respect.…”

“…This process is between reverse osmosis (RO) and ultrafiltration (UF). Its advantages over the reverse osmosis such as low operating pressure, high rejection of multivalent ions, relatively high permeate flux, and low operating costs led to some quick advances in many important applications including water softening, wastewater treatment, drinking water treatment, and dye removal, along with some applications in pharmaceutical industries [1,2]. The membranes used in the nanofiltration process are mostly thin film composites (TFCs) however some of the commercial nanofiltration membranes are asymmetric.…”

Effect of non-solvent additives on the morphology and separation performance of poly( m -phenylene isophthalamide) (PMIA) hollow fiber nanofiltration membrane

“…The separation mechanism of NF membrane involves a combination of steric (size exclusion) effect and electric (Donnan exclusion) effect. In the last few decades NF membrane technique has gained significant attention and be applied successfully in many fields such as drinking water [7][8][9][10][11][12][13], dye wastewater [14][15][16][17][18][19], food industry [20,21] and other industrial applications [22][23][24][25][26][27][28][29].…”

Performance evaluation of two stage nanofiltration for treatment of textile effluent containing reactive dyes

“…But complete removal of colour is a big challenge. Several methods like chemical oxidation [11], ultraviolet irradiation [12], ozonation [13], photochemical oxidation [14], electrochemical oxidation [15] offer possible alternative for treatment of textile effluent. Nanofiltration can be a viable alternative in this regard.…”