Adsorption characteristics and electrochemical performance of reactive red onto magnetic MgFe2O4 nanoparticles prepared via a facile alcohol combustion process

Magnetic MgFe2O4 nanoparticles were prepared successfully via a facile alcohol combustion process and applied to remove the reactive red (RR) from aqueous solution. Characterizations of the as-prepared MgFe2O4 nanoparticles were performed by the scanning electron microscopy (SEM), the transmission electron microscope (TEM), the X-ray diffraction (XRD), the vibrating sample magnetometer (VSM), and the Brunauer-Emmett-Teller (BET) measurement. The adsorption characteristics of RR onto MgFe2O4 nanoparticles at room temperature were investigated. Compared with the pseudo-first-order and intraparticle diffusion model, the pseudo-second-order kinetic model could be applied to evaluate the adsorption performance of RR onto MgFe2O4 nanoparticles in a range of initial concentration of 100-400 mg/L. Based on the values of the correlation coefficients, the equilibrium experimental data related to the adsorption of RR showed that the adsorption performance followed the Langmuir isotherm model with maximum adsorption capacity of 119.07 mg/g. The obtained results implied that the adsorption mechanism of RR onto MgFe2O4 nanoparticles at room temperature was the monolayer adsorption. Magnetic MgFe2O4 nanoparticles were prepared via the facile alcohol combustion process, and the magnetic MgFe2O4 nanoparticles were applied to remove the reactive red (RR) from aqueous solution, the adsorption kinetics and adsorption isothermals of RR onto MgFe2O4 nanoparticles at room temperature were investigated. [GRAPHICS] Highlights. MgFe2O4 nanoparticles were prepared via the facile alcohol combustion process.. The pseudo-second-order kinetics model can explain the adsorption process of RR onto them.. The adsorption isotherm of RR onto them at room temperature conformed to Langmuir model.