3D porous tubular network-structured chitosan-based beads with multifunctional groups: Highly efficient and selective removal of Cu2+

Herein, an effective adsorbent, 3D porous tubular network-structured citric acid-chitosan/Fe/polyethyleneimine beads (CCFPB) with multifunctional active groups and strong selectivity, was prepared for the selective removal of Cu2+ from simulated wastewater. Compared with pure chitosan beads (CB), the adsorption capacity of CCFPB for Cu2+ was increased by 127 mg g−1 (238%), and the adsorption equilibrium time was shortened by 480 min. The CCFPB...