Synthesis of Magnetic Iron Oxide Fe3O4/α-Fe2O3 for the Adsorptive Removal of Cadmium from Aqueous Solution
Koua Moro
Laboratoire de Constitution et Réaction de la Matière, Université Felix Houphouët-Boigny, 22 BP 582 Abidjan 22, Côte d’ivoire.
Aimé Serge Ello *
Laboratoire de Constitution et Réaction de la Matière, Université Felix Houphouët-Boigny, 22 BP 582 Abidjan 22, Côte d’ivoire.
Djedjess Essoh Jules-César Meledge
Laboratoire des Sciences Physiques, Fondamentales et appliquées, Ecole Normale Supérieure (Abidjan), 08 BP 10 Abidjan 08, Côte d’Ivoire.
Konan Roger Koffi
Laboratoire de Constitution et Réaction de la Matière, Université Felix Houphouët-Boigny, 22 BP 582 Abidjan 22, Côte d’ivoire.
*Author to whom correspondence should be addressed.
Abstract
Magnetic iron oxide nanoparticles were successfully synthesized by co-precipitation method. The magnetite and mixture of magnetite/ hematite iron oxide were obtained and characterized by X-ray diffraction, scanning electron microscopy, nitrogen adsorption/desorption isotherms and vibrating sample magnetometer. These nanoparticles exhibited good adsorbents performance for removal cadmium metal ion. The mixture of magnetite/ hematite particles showed small size of particle and removed cadmium ion rapidly. The rates of Cd removal were 90 and 95% with Fe3O4 and Fe3O4/α-Fe2O3 samples respectively and the pseudo first and second kinetic models were applied to describe adsorption. Langmuir and Freundlich models were used for describing adsorption isotherms.
Keywords: Cadmium, heavy metal, hematite, iron oxide, magnetite