Fe3O4@SiO2 nanoparticles decorated with glucosamine as an effective and recyclable magnetic adsorbent for the removal of Cu2+ ion from aqueous solutions

Esmaeilpour, Mohsen; Faghihi, Morteza; Ghahraman Afshar, Majid; Kazemnejadi, Milad

doi:10.22075/chem.2026.40156.2423

Fe3O4@SiO2 nanoparticles decorated with glucosamine as an effective and recyclable magnetic adsorbent for the removal of Cu2+ ion from aqueous solutions

Articles in Press

Document Type : Original Article

Authors

Mohsen Esmaeilpour ¹

Morteza Faghihi ²

Majid Ghahraman Afshar ³

Milad Kazemnejadi ⁴

¹ Chemistry and Process Research Department, Niroo Research Institute, Tehran , Iran

² faculty member/ Niroo research institute

³ aChemistry and Process Research Department, Niroo Research Institute (NRI), Tehran, Iran

⁴ bPolymer Chemistry Lab, Chemistry Department, Faculty of Sciences, Golestan University, Gorgan, Iran

10.22075/chem.2026.40156.2423

Abstract

Fe3O4@SiO2 nanoparticles modified by glucosamine were synthesized, and their ability for separation of heavy metal ion (Cu2+) from aqueous solutions was examined. Characterization of the synthetic nanocomposite was carried out using Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), transmission electron microscopy (TEM), field emission scanning electron microscopy (FE-SEM), dynamic light scattering (DLS), energy dispersive X-ray analysis (EDX), vibration sample magnetometry (VSM), Brunauer–Emmett–Teller (BET) and thermogravimetric analysis (TGA). The effect of parameters influencing adsorption efficiency including adsorption isotherms, adsorbent dosage, contact time of adsorbent, selective removal and solution pH on the sorption behavior was assessed and discussed. The kinetics curve examined the pseudo-second-order model better and the equilibrium data well fitted the Langmuir model, with the maximum adsorption capacity of 120.48 mg. g-1. The desorption of heavy metal ion was done effectively using HCl solution, thereby proving that nano sorbent can be magnetically separated, regenerated and reused effectively for seven consecutive cycles without significant loss of activity. The removal performance of adsorbent on the real wastewater samples is indicated the feasibility of adsorbent for applying in industrial purposes.

Keywords

Fe3O4@SiO2 nanoparticles

Surface modification

Adsorption/Desorption

Heavy metal

Magnetic separation

Removal efficiency

Subjects