Facile Synthesis Of Layered Core-Shell Structure Fe3o4 Magnetic Composites And Its Application For The Co2+ Removal

Using chemical co-precipitation method to make a magnetic magnetite, dithiocarbamate-multifunctional embedded in the carboxyl group to synthesize a novel nanocomposite Fe3O4@SiO2-DTPA-DTC for adsorption the Co(2+)from aqueous solution. The Fe3O4@SiO2-DTPA-DTC composites were characterized by XRD, SEM, TEM, XPS, TGA and VSM in this study. From the adsorption study, removal efficiency of Co2+ on Fe3O4@SiO2-DTPA-DTC is up to 98%. The adsorption reached equilibrium within 5 min. The optimum pH was recorded to be 6.0. The adsorption process fitted with Freundlich isotherm model and adsorption mechanism is chemical adsorption. After five-cycle adsorption test, the nanocomposites maintain high removal efficiency. The results showed that the Fe3O4@SiO2-DTPA-DTC can be considered as a promising adsorbent to adsorption the Co2+ from aqueous solution. (C) 2021 Elsevier B.V. All rights reserved.