Competitive Biosorption of Azo-Dyes in Aqueous Solution on Magnetic Biosorbent Nanoparticles

Abstract

Abstract— In this study, glutaraldehyde cross-linked magnetic chitosan nanoparticles (GMCNs) were prepared through crosslinking modification of magnetic chitosan nanoparticles (MCNs) using glutaraldehyde as crosslinker that exhibited excellent adsorption performance Reactive Black 5 (RB5) and Metanil Yellow (MY) in dyes mixture solution. The characterization of synthesized GMCNs was performed by fourier transform infrared spectroscopy (FTIR), transmission electron microscopy (TEM), dynamic light scattering (DLS), scanning electron microscopy (SEM) and vibrating sample magnetometry (VSM) analyses. Adsorption characteristics of dyes mixture solution on to GMCNs have been studied and results indicated that the adsorption capacities were affected by initial dye concentrations and contact time. The adsorption of dyes mixture solution experiments were well fitted the pseudo-second-order reaction. The technique used in this study offers a convenient and economical method for the preparation of nanoparticles, which can facilitate a higher adsorption capacity and thus more efficient adsorption of dyes in an aqueous solution compared with nature or other synthetic materials

Keywords— Azo Dye, Biosorption, Biosorption isotherm, Biosorption kinetics, Magnetic Biosorbent