Carboxymethyl Cellulose/Polyacrylamide/Fe<sub>3</sub>O<sub>4</sub> Magnetic Ion Imprinting Biosorbent for Removal and Recovery of La<sup>3+</sup>
Shuteng Wang, Ming Kong, Wei Li, Enjie Yi, Yan Wang, Minghui Shen, Hao Liu, Shixue Ren, Yuan‐Ru Guo, Jiguo Zhang
Abstract
High Resolution Image Download MS PowerPoint Slide To use resources rationally, the recovery and recycling of rare earth (RE) from industrial sewage have attracted a lot of attention. Herein, a polymer adsorbent CMC/PAM/Fe 3 O 4 (CPF) was synthesized from renewable carboxymethyl cellulose (CMC), polyacrylamide (PAM), and Fe 3 O 4 by the template of La 3+ using ion imprinting technology. The CPF was characterized with X-ray diffraction (XRD), IR, X-ray photoelectron spectroscopy (XPS), and scanning electron microscope (SEM), and results show that PAM and CMC can crosslink with each other and form copolymers with Fe 3 O 4 particles dispersing in it. The adsorption properties for the template ions La 3+ were fully studied. It is found that CPF exhibited good adsorption performance with an adsorption capacity of 34.6 mg·g –1 . Cycling experiments show that CPF still has high efficiency even after 5 cycles. Meanwhile, the desorption rate can reach more than 98%. The low wastage and high adsorption/desorption efficiency would enable CPF to be a good candidate adsorbent for removal/recovery of La 3+ from industrial sewage.