Simultaneous adsorption of Cr(III) ions and contaminants on sugarcane bagasse/rice husk fiber-based amine magnetic biocomposite

Bagasse and rice husk are agricultural wastes that will continue to be generated along with human activities. The handling of this waste has not been optimized, so it will have an impact on the environment. However, bagasse and rice husk waste have a large cellulose content of 40 % and has the potential as a source of fibre in the development of new materials. These fibres can be used as templates for biocomposite. The combination of fibres and magnetic nanoparticles will produce biocomposite with specific properties. Sugarcane bagasse/rice husk fiber-based amine biocomposite produced by one-step solvothermal method and used as super adsorbent for wastewater treatment. The delignified fiber of sugarcane bagasse and rice husk were applied by a one-step solvothermal process to produce magnetic biocomposite. The magnetic particles were formed over the fiber surface which was observed by Field Emission-Scanning Electron Microscopy (FE-SEM). The specific peaks formed for X-Ray diffraction (XRD) spectra were fitted as magnetite. Fourier Transform Infra-Red (FT-IR) showing Fe-O bonding in Fe3O4 and N-H bending vibration. Surface functionalization of biocomposite enhances the surface area increased up to 65 % which effects to adsorption process. The Optimum conditions for adsorption of Cr(III) ions at pH 5 for 240 min which fitted well by pseudo 2nd order model and Langmuir isotherm adsorption with maximum adsorption capacity of 132.92 mg/g. The simultaneous adsorption on amine magnetic biocomposite also affected Chemical Oxygen Demand (COD), Total Suspended Solid (TSS), and dye were achieved and reduced the number of the contaminants. The 4th used for reuse in adsorption is shown stable and good performance. The amine magnetic biocomposite is effective and a candidate material for adsorbent in the field of wastewater treatment.