Magnetic chitosan-benzoin Schiff's base/fly ash for reactive blue 19 dye removal: Characterization and parametric optimization

• Published in: Inorganic Chemistry Communications
• Main Author: Alia K.; Reghioua A.; Atia D.; Mbuvi H.M.; Moussaoui Y.; Jawad A.H.
• Format: Article
• Language: English
• Published: Elsevier B.V. 2024
• Online Access: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85201422425&doi=10.1016%2fj.inoche.2024.112988&partnerID=40&md5=6089e22097fe85f39a3c3d8315af054b

A new composite adsorbent of magnetic chitosan-benzoin/fly ash (Cn-Bn-FSH-Fe3O4) was developed for removal of anionic organic dye (Reactive blue 19: RB19) from aqueous medium. To ascertain the physicochemical characteristics of Cn-Bn-FSH-Fe3O4, BET, SEM-EDX, FTIR, XRD, and pHpzc test were used. The experimental data was simulated via RSM-BBD to pinpoint the influence of adsorption factors precisely. Laboratory results, including the RSM model outcomes evidenced that the highest RB19 elimination value (97.95 %) was achieved when using Cn-Bn-FSH-Fe3O4 of 0.1 g, solution pH of 4, temperature of 45 °C, and a span time of 32.5 min. The adsorption data were well described by the pseudo-second-order kinetic and Freundlich isotherm models, the monolayer adsorption capacity for RB19 was found to be 309.6 mg/g. The thermodynamic parameters indicated that this adsorption system was endothermic in nature. Thus, this study reaffirms the applicability of the Cn-Bn-FSH-Fe3O4 as promising adsorbent for toxic textile dye removal. © 2024 Elsevier B.V.