FE3O4 IMMOBILIZED IN CALCIUM ALGINATE (CAALG-FE3O4) AS ADSORBENT FOR CE(III) IONS

• Main Author: NUR’ASNI YULIANTI NIM:10513078, SILMI
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/30955
• Institution: Institut Teknologi Bandung

Cerium is a rare earth metal that is widely used as materials for making electronic devices. The increasing use of cerium will lead to increased cerium waste in the environment. The existence of cerium is relatively harmful because if it accumulates in the body will lead to disruption of lung and liver function. Adsorption is an effective technique for reducing metal ion waste in a solution because it is cheap, effective, and environmentally friendly. The separation process of calcium alginate in the solution after being used as an adsorbent is so difficult that it needs supporting material that can facilitate the separation process. In this study, synthesized calcium alginate contains Fe3O4 (Ca alg-Fe3O4) as a Ce (III) ion adsorbent. The synthesized Caalg-Fe3O4 was characterized using Fourier Transform Infrared Spectroscopy (FTIR) and Scanning Electron Microscopy-Energy Dispersive Spectroscopy (SEM-EDS). The results showed that the optimum condition of adsorption was achieved on composition ratio of Ca alginate: Fe3O4 2: 1, pH 4, 0.075 g of adsorbent mass, 3.5 hours contact time and initial concentration of Ce (III) ion 250 ppm. The adsorption process of Ce (III) ion follows the Langmuir isotherm model and pseudo second order kinetics with a maximum adsorption capacity is 50.505 mg g-1. The thermodynamic parameters yield ΔS = -0.075 kJ mol-1 K-1 and ΔH = -17.207 kJ mol-1.