Fabrication of Polyethyleneimine-Modified Nanocellulose/Magnetic Bentonite Composite as a Functional Biosorbent for Efficient Removal of Cu(?)

A novel inorganic–organic biosorbent, polyethyleneimine (PEI)-modified nanocellulose cross-linked with magnetic bentonite, was prepared for the removal of Cu(?) from water. Fourier transform infrared spectroscopy (FT-IR) and X-ray diffraction (XRD) showed that amino carboxyl groups were successfully grafted onto structure. The adsorption performance various factors, using investigated. results show equilibrium could be reached within a short time (10 min), capacity up to 757.45 mg/g. kinetics isotherms well-fitted pseudo-second-order Freundlich isotherm models, respectively. process composite is mainly controlled by chemisorption, functional group chelation electrostatic force mechanisms; pore filling also has great influence on Cu(?). It found modified potential heavy metals