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

► Novel nanofiltration (NF) membranes based on UV-grafting on sulfonated material. ► Use of positively charged vinyl monomers to induce positive charge on NF membrane. ► High water flux of 9-14 LMH bar−1 and impressive rejection of more than 99% to Safranin O dye molecule.