Research Information System
Journal of the Faculty of Engineering and Architecture of Gazi University, vol.37, no.3, pp.1427-1440, 2022 (SCI-Expanded)
© 2022 Gazi Universitesi Muhendislik-Mimarlik. All rights reserved.In this study, iron modified chitosan (CS) adsorbent material was developed, and Reactive Orange 16 (RO16) dye removal was investigated. To determine the maximum iron content, chitosan was agitated at 25°C for 2h with FeSO4 solution containing 250, 500 and 750 mg/L [Fe+2]. The adsorbents were identified as CSFe- 1, CSFe-2 and CSFe-3. Fe+2 adsorption values were calculated as 79, 112 and 110 mg/g. CSFe-1 and CSFe- 2 adsorbents were selected, and adsorption studies were carried out in 50 mg/L RO16 solutions at 0.5 g/L adsorbent amount. The color removal efficiencies were calculated as 27, 91 and 88 mg/g for pure chitosan, CSFe-1 and CSFe-2, respectively and found as 25% with pure chitosan, 90% for both CSFe-1 and CSFe-2. The best yield was obtained for the CSFe-1 adsorbent. To determine the optimum adsorption conditions, adsorbent amount (0.25, 0.5, 1 g CSFe-1/L), agitation speed (250, 350 rpm), dye solution concentration (25, 50, 100 mg/L) and temperature (25, 50°C) effects were investigated. The 0.5 g CSFe-1/L loading, 250 rpm, 25°C and 50 mg/L dye solution concentration was determined, and 92% color removal efficiency was obtained. Color removal efficiencies of CSFe-1 in three consecutive runs were calculated as 92, 90 and 87%, respectively.