High-efficiency Fe(III) ion adsorption of magnetic biocomposite material based on rice husk-sugarcane bagasse fibers

Rice husks and sugarcane bagasse are waste of agriculture industry which contain of fibers. The utilization of rice husk and sugarcane bagasse will produce raw material as cellulose fiber. Those fibers could be used as matrix for magnetic biocomposite formation. The magnetic biocomposite is potential as adsorbent for water treatment. The performance of Fe(III) ion adsorption and reusability of adsorbent were studied. The synthesis of magnetic biocomposite was conducted by solvothermal method. The size of rice husks and sugarcane bagasse were sieved pass of 60 mesh. In order to get cellulose fiber, the rice husk and sugarcane bagasse pass through delignification process. Rice husk fiber and sugarcane bagasse with ratio 1:1 were added into ethylene glycol containing of FeCl3.6H2O, anhydrous sodium acetate, and 1,6-hexanediaminse. Next, the mixture was poured into Teflon Stainless Steel Autoclave Reactor and heated at 200°C for 6 h. The black precipitate was produced as magnetic bio-composite. The magnetic nanoparticles were found along fiber which identified by Field Emission Scanning Electron Microscopy (FE-SEM), X-ray Diffraction (XRD), and Fourier Transform Infra-Red measurement. The optimum condition of Fe (III) ion adsorption was achieved at pH 5 for 60 mins with adsorption capacity about 54.77 mg/g. The magnetic biocomposite is reusable, it showed a good performance with a decreasing number only 6.9% for 4th repetitions at same condition.