Isotherm and Kinetic Modeling of AdsorptionofAcridine Orange Using Eucalyptus-Wood Based Activated Carbon Modified with Maghemite Nanoparticles

In this study, activated carbon (AC) was prepared from low cost and locally availablesource such aseucalyptus wood,the activated carbon modified with γ-Fe2O3.The activated carbon was produced by the acid treatmentof the carbon obtained from eucalyptus wood. The prepared nanomaterial wascharacterized by field emission scanningelectron microscopy (FE-SEM), X-ray diffraction (XRD)and vibrating sample magnetometer (VSM)to examine theirsize and magnetic moment.The Fe203 nanoparticle loaded activated carbon (γ-Fe2O3-NPs-AC) was used as noveladsorbent for theremoval of acridine orange.The Freundlich and Langmuir isotherms were studied. The Langmuir wasfound to be most applicable isotherm which predicted maximum monolayer adsorption capacities of 154.74 mgg-1forthe adsorption of dye.The pseudo-second order model was found to be applicable for the adsorption kinetics.

Keywords:

Maghemite nanoparticles , Acridine Orange , activated carbon