Process Optimization and Adsorptive Mechanism for Reactive Blue 19 Dye by Magnetic Crosslinked Chitosan/MgO/Fe3O4 Biocomposite

A new biocomposite cross-linked glutaraldehyde-chitosan/MgO/Fe3O4 (CTS-GL/MgO/Fe3O4) adsorbent with magneto-responsiveness was prepared and applied for the removal of reactive blue 19 (RB-19), a synthetic textile dye. The CTS-GL/MgO/Fe3O4 structurally characterized using spectroscopic (XRD, FTIR, SEM–EDX), its physicochemical properties were evaluated potentiometry pHpzc analyses. influence various adsorption parameters (A: dosage; B: initial solution pH; C: process temperature; D: contact time) on efficiency RB-19 statistically optimized Box-Behnken design (BBD). analysis variance (ANOVA) indicates presence five significant statistical interactions between parameters, as follows: AB, AC, AD, BC, BD. equilibrium dye uptake by Freundlich isotherm model heterogeneous adsorption, while kinetics well-described pseudo-second-order model. maximum capacity towards 193.2 mg/g at 45 °C. This work highlights development recoverable magnetic favourable good separation ability an external field. Moreover, adsorbents from treated is easy convenient apply to continuous flow systems, which highly preferred industrial applications.