Synthesis And Characterization Of Fe3o4−mwcnts Adsorbent: Application For Bromocresol Purple Dye Removal In Aqueous Medium

Résumé: Magnetic nanocomposite was synthesized from iron salts and multi-walled carbon nanotubes (Fe3O4−MWCNTs) using the chemical coprecipitation method. The characterization of Fe3O4−MWCNTs adsorbent was carried out using X-Ray diffraction (XRD); Fourier transform infrared spectroscopy (FTIR); Brunauer-Emmett-Teller (BET) and scanning electron microscopy (SEM). The prepared material has exhibited a higher adsorption capacity 296.52 mg.g-1 to remove the Bromocresol purple (BCP) dye from aqueous solutions. Kinetic study shows that the equilibrium time reached after 80 minutes and the pseudo second order best suited this adsorption. Isotherm models indicate that the adsorption represented perfectly by the Langmuir. Thermodynamic study suggests that the sorption process is spontaneous, exothermic and physisorption type. This work focused on the efficiency of nanocomposite Fe3O4−MWCNTs as a magnetically separable adsorbent compared with pure multi-walled carbon nanotubes.

Publié dans la revue: Journal of New Technology and Materials