interface-tailored magnetite: multiple-functionalized adsorbent for removing dye contaminant

The effort for synthesizing effective adsorbent is growing at a frantic pace to tackle the issue of contaminated water. the objective of this research is to tailor the magnetite nanoparticles to make a novel multiple-functionalized composite for removing dye pollutants. the origins of the architected groups were aminopropyl-treated silica, low molecular mass chitosan, graphene oxide, and diethylenetriaminepentaacetic acid. compared to individual ingredients, the synthesized magnetic adsorbent revealed a remarkable synergism effect causing enhanced adsorption of cationic blue 41. the adsorption conditions were optimized by the design of experiment, and the best removal was obtained at ph = 9.0, temperature of 47.1 °c and adsorbent dosage of 0.0198 g·l-1. based on the kinetic study, the adsorption process was fast and almost completed within 30 min. the modified pseudo-n-order was the best model to fit the experimental data. the coulombic attraction, pi stacking, and h-bonding were dominant forces to adsorb cationic blue 41. besides, the high adsorption capacity of 55.9 mg·g-1 was obtained by the equilibrium experiments satisfactorily correlated with the modified langmuir-freundlich isotherm.