Semnan University Press Applied Chemistry Today 2981-2437 15 54 2020 03 20 Preparation Improvement of Functionalized Graphene Oxide with Fe3O4: Adsorption of pb2+ and Pd2+ from Aqueous Solution Preparation Improvement of Functionalized Graphene Oxide with Fe3O4: Adsorption of pb2+ and Pd2+ from Aqueous Solution 9 30 3844 10.22075/chem.2019.15161.1464 FA Shabnam Sheshmani Associated Prof. of Inorganic Chemistry, Department of Chemistry, College of Basic Sciences, Yadegar-e-Imam Khomeini (RAH) Branch, Islamic Azad University, Tehran, Iran Hamideh Sadat Najafi Department of Chemistry, College of Basic Sciences, Yadegar-e-Imam Khomeini (RAH) Branch, Islamic Azad University, Tehran, Iran, 18155/144 Journal Article 2018 08 04 In this present study, preparation of graphene oxide is improved. Graphene oxide was obtained with high purity and high interlayer distance in low time via changes in Staudenmaier method. Then, graphene oxide was functionalized with Fe3O4 nano particles. Characterization was carried out by FT-IR and XRD techniques. Then, adsorption of Pb2+ and Pd2+ ions from aqueous solution was investigated using functionalized and no functionalized graphene oxide. Several important parameters in the adsorption were studied such as sorbent mass, contact time, pH, temperature and metallic pollutants amount. The maximum adsorption value of Pb2+ ion were 86.5 and 93% using graphene oxide and magnetic graphene oxide, respectively. While, maximum adsorption value of Pd2+ ion were 63 and 78% using these adsorbents. The experimental results showed that lead and palladium ions adsorption much better fit with the Freundlich and Temkin isotherms. The best model for the adsorption kinetic was shown with the Logergren and Elovich kinetic models. It can be concluded that the magnetic graphene oxide has high adsorption, which can be used as an effective adsorbent for Pb2+ and Pd2+ ions. In this present study, preparation of graphene oxide is improved. Graphene oxide was obtained with high purity and high interlayer distance in low time via changes in Staudenmaier method. Then, graphene oxide was functionalized with Fe3O4 nano particles. Characterization was carried out by FT-IR and XRD techniques. Then, adsorption of Pb2+ and Pd2+ ions from aqueous solution was investigated using functionalized and no functionalized graphene oxide. Several important parameters in the adsorption were studied such as sorbent mass, contact time, pH, temperature and metallic pollutants amount. The maximum adsorption value of Pb2+ ion were 86.5 and 93% using graphene oxide and magnetic graphene oxide, respectively. While, maximum adsorption value of Pd2+ ion were 63 and 78% using these adsorbents. The experimental results showed that lead and palladium ions adsorption much better fit with the Freundlich and Temkin isotherms. The best model for the adsorption kinetic was shown with the Logergren and Elovich kinetic models. It can be concluded that the magnetic graphene oxide has high adsorption, which can be used as an effective adsorbent for Pb2+ and Pd2+ ions. https://chemistry.semnan.ac.ir/article_3844_494c08f7a144d3cc4cfa661ed1244039.pdf