Adsorption of Ce(III) Metal Ions Using Magnetite-Alginate Composite Crosslinked with Glutaraldehyde
Rusnadi, Kendra Laylasafit

Analytical Chemistry Research Group, FMIPA, ITB

Abstract

Cerium (Ce) is one of the rare earth metals with the highest abundance among its group in the form of mineral rocks. It is widely used in the television manufacturing industry, ceramic industry and catalyst. Adsorption is an easy and effective separation method to reduce the amount of Ce(III) ions in wastewater. In this study, Magnetite-Alginate composite crosslinked with Glutaraldehyde (MAG) was developed. The synthesis of adsorbents begins with the manufacture of magnetite in Na-Alginate solution media until magnetite is coated by alginate. The resulting powder is then re-soaked in Na-Alginate solution and glutaraldehyde is added and the reaction temperature is maintained at 80&#8451- so that crosslinking between alginate chains occurs. The successfully synthesized MAG adsorbent was then characterized using Fourier Transform Infrared (FTIR), X-Ray Diffraction (XRD), Scanning Electron Microscopy- Energy Dispersive Spectroscopy (SEM-EDS). Optimum adsorption parameters for Ce(III) uptake using batch method were achieved at pH 4, contact time 4 hours and adsorbent mass 0.05 grams. The Ce(III) ions adsorption followed the Langmuir isotherm model with a maximum adsorption capacity (qm) of 37.73 mg g-1 and a pseudo second-order reaction kinetics model.

Keywords: Ce(III), Alginate, Magnetite, Glutaraldehyde, Adsorption

Topic: CHEMISTRY AND MATERIAL SCIENCES