نوع مقاله : مقاله علمی پژوهشی
عنوان مقاله English
نویسندگان English
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.
کلیدواژهها English
