Study of the removal of coomassie brilliant blue G-250 dye from aqueous solutions using spinel oxide MnFe2O4-MgO nanocomposites

The removal of acid (CBBG-250) dye by adsorption was investigated using MnFe2O4–MgO Nanocomposites under various optimization settings, including ionic strength, pH, contact time, composite oxide dose, and starting dye concentration. The removal ratio was 98.012% obtained at 298 K using the following parameters: adsorbent weight of 0.008 g composite oxide, dye concentration of 25 ppm, and contact time of 5 minutes. Adsorption equilibrium isotherms were investigated. Three adsorption models-Langmuir, Freundlich, and Temkin isotherms at various temperatures (298–338 K). Select the proper isotherm for the removal operation. The results of the adsorption isotherm closely matched the Freundlich, and Temkin isotherm. The adsorption process at the solid/solution interface showed associated with increased randomness in relation to negative ΔG. Giles is the orientation of the adsorbed molecules on the adsorbent surface, oblique or vertical (S-curve).