Fabrication and modification of polysulfone nanofiltration membrane using organic acids: Morphology, characterization and performance in removal of xenobiotics

► Nanofiltration PS membranes were modified by addition of organic acids. ► Organic acids with different structures and acidic strengths were used as additives. ► Performance of the membranes was investigated in removal of xenobiotics. ► Addition of organic acids considerably increased the hydrophilicity of PS membrane. ► Prepared membranes represented higher flux and rejection in removal of xenobiotics.