PREPARATION OF MAGNETITE-CELLULOSE NANOCRYSTAL FROM DATE PALM SEEDS (MCN) ADSORBENT FOR CE (III) IONS ADSORPTION

• Main Author: Yunisa, Rima
• Format: Final Project
• Language: Indonesia
• Subjects: Kimia
• Online Access: https://digilib.itb.ac.id/gdl/view/65041
• Institution: Institut Teknologi Bandung

Cerium is one of the most abundant lanthanide series on the earth’s crust. It is used in metallurgy as a stabilizer of alloys and welding electrodes, a barrier layer in glass from ultraviolet radiation, as well as a catalyst and ceramics additive. Because of the high price and wide utilization of cerium, it is necessary to recover it. In addition, cerium that disposed to the environment directly has a possibility causing pollutants, especially in soil and water. Cerium could cause dysfunction of the lung, kidney, liver, brain and other organs for humans. Adsorption is one of the possible methods to overcome metal ion pollutions in aqueous. In this research, the preparation and utilization of magnetite-nanocrystal cellulose (MCN) adsorbent from date palm seeds has been studied for the adsorption of Ce(III) ions. Cellulose is obtained from date palm powder through an extraction using H2SO4, hydrolyzed using KOH, bleaching, then converted to nanocrystal cellulose (NC) through acid hydrolysis. Cellulose and nanocrystals were obtained with the percentage recovery of 51.29% and 12.33%, respectively. MCN synthesis was carried out by reacting the NC suspension with FeCl3.6H2O, FeSO4.7H2O, with NH4OH base. The FTIR spectra of cellulose indicated the presence of hemicellulose, lignin, lipid, and polyphenolic compounds. The NC FTIR spectra showed similarities to the cellulose FTIR spectra. The presence of an absorption band at 574.82 cm-1 (Fe-O stretching) indicated that MCN was successfully synthesized, and Fe3O4 nanoparticles were dispersed in the NC matrix. MCN has a degree of crystallinity of 41.90% and an average crystalline particle size of 13.97 nm. The optimum conditions for the adsorption of Ce(III) ions by MCN were reached at pH 6 and a contact time of 4 hours. The adsorption of Ce(III) ions by MCN followed Freundlich isotherm model