Magnetically separable CoFe2O4/CoxFey/activated carbon composites for Cd(II) removal from wastewater. (10th November 2016) - Xu, Jingcai
Abstract : CoFe2 O4 and Co x Fe y were anchored into activated carbon (AC) to synthesize CoFe2 O4 /Co x Fe y /AC composites using the sol–gel method for Cd(II) adsorption from wastewater. The results indicated that CoFe2 O4 and Co x Fe y nanoparticles existed in the pores of AC. The magnetic properties of CoFe2 O4 /Co x Fe y /AC indicated it could be separated and retrieved easily using an external magnet after Cd(II) adsorption. The effects of solution pH, temperature and initial Cd(II) concentration on the Cd(II) adsorption of AC and CoFe2 O4 /Co x Fe y /AC were investigated. The standard free energy, enthalpy change and entropy change were evaluated. The kinetic parameters of Langmuir and Freundlich isothermal equation were analyzed, and the Freundlich kinetic model was feasible for describing the Cd(II) adsorption process of CoFe2 O4 /Co x Fe y /AC composites. Abstract : CoFe2 O4 and Co x Fe y were anchored into activated carbon (AC) to synthesize magnetically separable CoFe2 O4 /Co x Fe y /AC composites by the sol–gel method for Cd(II) adsorption from wastewater. The effects of solution pH, temperature and initial Cd(II) concentration on Cd(II) adsorption of AC and CoFe2 O4 /Co x Fe y /AC were investigated. The standard free energy, enthalpy change and entropy change were evaluated.