Polymer-grafted magnetic microspheres for enhanced removal of methylene blue from aqueous solutions

Abstract

Chitosan/magnetite composite microspheres were grafted with polymer by graft polymerization of 2-acrylamido-2-methylpropane sulfonic acid and acrylic acid onto their surface and then applied for the removal of methylene blue from aqueous solutions.

Magnetic Template Anion Polyacrylamide–Polydopamine-Fe3O4 Combined with Ultraviolet/H2O2 for the Rapid Enrichment and Degradation of Diclofenac Sodium from Aqueous Environment

“…Compared with other two models, the PSO model correlation coefficients were much closer to 1.0, meanwhile the q value calculated by PSO model is much closer to the actual value. This confirmed that DCFS removal rate was dependent on the quantity of DCFS flocculated onto the surface of TAPAM-PDA-Fe3O4 [36,37]. The PSO model simulated curves of DCFS enrichment kinetics by TAPAM-PDA-Fe3O4 are presented in Figure 10A.…”

“…Compared with other two models, the PSO model correlation coefficients were much closer to 1.0, meanwhile the q value calculated by PSO model is much closer to the actual value. This confirmed that DCFS removal rate was dependent on the quantity of DCFS flocculated onto the surface of TAPAM-PDA-Fe 3 O 4 [36,37] Where q e and q max,exp are the enrichment capacity of the magnetic flocculant at equilibrium and the actual maximum enrichment capacity of the magnetic flocculant, respectively. k 1 and k 2 are the rate constant of first-order and second-order flocculation, respectively.…”

Nanomaterials with Tailored Magnetic Properties as Adsorbents of Organic Pollutants from Wastewaters

“…Compared to unmodified adsorbents, the adsorption capacities toward Food Yellow 3 and Acid Yellow 23 were considerably enhanced after modification, indicating that the dyes were captured by electrostatic interaction and ion exchange. On the other hand, polymer-grafted magnetic microspheres (GMMs) were prepared by graft polymerization of 2-acrylamido-2-methylpropane sulfonic acid and acrylic acid onto the surface of chitosan/magnetite composite microspheres and were used as an adsorbent to remove methylene blue from aqueous solutions [122]. The authors reported a maximum adsorption capacity for methylene blue of 926 mg g −1 , which is notably higher than the reported values for other adsorbents.…”

Efficient synthesis of cefadroxil in [Bmim][NTf2]‐phosphate cosolvent by magnetic immobilized penicillin G acylase

“…Meanwhile, the biological compatibility of magnetic polymer microsphere surface could be improved by modification of organic functional groups. In recent years, the magnetic polymer microspheres have been developing as novel functional materials . Wang et al reported magnetic poly(styrene‐glycidyl methacrylate) porous microspheres with high magnetic content were prepared by surfactant reverse micelles and emulsion polymerization of monomers, in which the well‐dispersed Fe 3 O 4 nanoparticles were modified by polyethylene glycol and oleic acid respectively.…”