Adsorption of anionic dyes from aqueous solution by iron oxide nanospheres

Magnetic iron oxide nanospheres were fabricated for removal of anionic dyes from aqueous solution. The iron oxide nanospheres are ferromagnetic and can be separated by an external magnetic field. The iron oxide has been synthesized with the solvothermal method. The prepared product was characterized by SEM and XRD methods. The adsorption of Reactive Orange (RO) and Reactive Yellow (RY) on to iron oxide nanospheres was investigated from both equilibrium and kinetic point of view and the results were modeled with appropriate equilibrium and kinetic models. The influences of solution pH and temperature on the removal efficiency were studied too.