چكيده به لاتين
Abstract:
Adsorption process is attractive due to its merits of efficiency, economy and simple operation. In this study, at first, Fe3O4@MnO2 magnetic nanoparticles were synthesized using a one-pot method. The properties of these nanoparticles were characterized by various analysis methods such as XRD, EDS, FTIR, FESEM, TEM, VSM and BET. These analysis indicated that the mean particle size of Fe3O4@MnO2 MNPs is 40 nm and specific surface area is 158.23 m2/g. then, the batch experiments were conducted for the removal of copper from aqueous solution using Fe3O4@MnO2 MNPs as adsorbent. The effect of different parameters including contact time, initial Cu2+ concentration, initial pH of solution, adsorbent dosage, and temperature were studied to evaluate the adsorption capacity. The Langmuir isotherm yields a better fit than the Freundlich and Temkin isotherms for Cu2+ adsorption on Fe3O4@MnO2 MNPs. From the Langmuir isotherm, the maximum adsorption capacity of magnetic nanoadsorbent toward Cu2+ was found to be 416.67 mg/g. The kinetic adsorption indicated that the pseudo second order model characterized the kinetic data better than the pseudo first order model.
Keywords: Adsorption; Copper ions; Magnrtic nanoparticles; Fe3O4@MnO2.
