Efficient Kinetic Removal of Anionic Azo Dye by New Functionalized Magnetic Biocomposite

Abstract

Recently, nanomaterials based adsorbents play a prominent role in the removal of contaminants from aqueous solution. Hence in the present study, an efficient magnetic biocomposite (MBC) based on raw biomass (pomegranate waste) was prepared by coprecipitation method using metal chlorides for anionic azo dye (congo red, CR) removal. The structure and properties of MBC were characterized by various techniques such as Fourier transform infrared spectra (FTIR), X-ray diffraction (XRD), and vibrating sample magnetometer (VSM). The adsorption kinetic was applied to interpret the CR dye adsorption process on MBC. The kinetic results showed the MBC possessed prominent uptake ability toward congo red dye. The pseudo-first-order kinetic (R2 = 0.9941) fitted the data well. The results revealed that the MBC could efficiently adsorb the azo dyes from aqueous solution, and the spent adsorbents could be recovered completely by magnetic separation process. This work proved that the MBC could selective and efficient adsorb congo red dye, which provided some insights into wastewater treatment, water quality inspection and environmental remediation.