Defect-Free Na+-Cu2+/GO-PEI Nanocomposite Membrane for Efficient Removal of Organic Pollutants from High-Salinity Brine

Key Points

• The study aims to develop a defect-free nanocomposite membrane for effective removal of organic pollutants from high-salinity environments.
• Utilized pH-controlled crosslinking for membrane fabrication.
• Incorporated polyethyleneimine (PEI) as a stabilizing agent at the nanocomposite interface.
• Optimized pore structure through sodium (Na+) and graphene oxide (GO) layers.
• Achieved a separation efficiency of 98% for various contaminants.
• Maintained high permeability of 160–224 L·m-2·h-1.
• Demonstrated excellent chemical stability and mechanical durability after 500 folding cycles.