Title
CoFe2O4/chitosan magnetic nanocomposite: Synthesis characterization and application for adsorption of acidic yellow dye from aqueous solutions
Authors
HAMIDREZA ANSARI MAHSASADAT MIRALINAGHI and FARIBORZ AZIZINEZHAD

Received July 7, 2018
Published Volume 53 Issue 1-2 January-February
Keywords Acid yellow, adsorption, chitosan, dye, removal

Abstract
Magnetic chitosan-modified CoFe2O4 nanoparticles, CS/CoFe2O4, were successfully synthesized by an in situ coprecipitation technique. The structure, crystal phase, surface morphology and magnetic properties of CS/CoFe2O4 were characterized by FTIR, TGA, XRD, FE-SEM, EDX and VSM analyses. The as-prepared CS/CoFe2O4 nanoparticles were employed to adsorb Acid Yellow 17 dye (AY17) from aqueous solutions. The influence of experimental parameters, such as pH, temperature, contact time, adsorbent dosage and initial dye concentration on the efficiency of AY17 adsorption was studied. The maximum dye removal percentage reached 90% after 90 min adsorption at pH 4.0 and 323 K for the solution with an initial AY17 concentration of 30 mg L–1 and CS/CoFe2O4 dose of 0.01 g. The adsorption kinetics agreed well with the pseudo-second order model. The isothermal data preferably followed the Langmuir model, with the maximum adsorption capacity of 89.10 mg g–1. Thermodynamic studies illustrated that the adsorption process is endothermic and spontaneous.