Novel Positively Charged Metal-Coordinated Nanofiltration Membrane for Lithium Recovery

Nanofiltration (NF) with high water flux and precise separation performance Li+/Mg2+ selectivity is ideal for lithium brine recovery. However, conventional polyamide-based commercial NF membranes are ineffective in recovery processes due to their undesired selectivity. In addition, they constrained by the permeance trade-off, which means that a highly permeable membrane often has lower this study, we developed novel nonpolyamide based on metal-coordinated structure, exhibits simultaneously improved Specifically, optimized Cu-m-phenylenediamine (MPD) demonstrated of 16.2 ± 2.7 LMH/bar 8.0 1.0, surpassed trade-off Meanwhile, existence copper Cu-MPD further enhanced anti-biofouling property nanofiltration possesses pH-responsive property. Finally, transport model Nernst-Planck equations been fit rejection uncharged solutes experiments conducted. The had deviation below 2% all performed suggested an average pore radius 1.25 nm porosity 21% membrane. Overall, our study provides exciting approach fabricating high-performance context