Synthesis and Efficiency Evaluation Fe2O3@SiO2 Nanoparticle in Acid Blue 92 Removal from Aqueous Solutions: Equilibrium and Kinetic Studies

Dyes are one of the most important existing pollutants in textile industrial wastewater. They are often toxic, carcinogenic, teratogenic, and non-biodegredable. So the aim of this study was synthesis Fe2O3@SiO2 nanoparticle and using it as adsorbent for the removal of acid blue 92 from aqueous solutions. In this study, the electrochemical method for synthesis nanoparticle was used and characteristics of nanoparticle were analyzed by SEM (Scanning electron microscopy) technique. In this study, the effect of the pH (2-11), contact time (20-150 min), nanoparticle dosage (0.02-0.14g/L) and concentration of dye (20-120 mg/L) was investigated by one factor at the time method and then was optimized. The pH equal to 2, contact time of 40 min, and absorbent of 0.08 g/l was obtained as experimental data correlate to the pseudo-second order kinetic (R2=0.995) and Dubinin-Radushkevich adsorption isotherm model (R2=0.989). In optimal conditions, Fe2O3@SiO2 nanoparticle has well potential to quickly and effectively remove dye and simply be separated from the solution by the magnet due to its magnetic property.