Fig. 9
The adsorption isotherms (a) Langmuir (b) Freundlich (c) Temkin and (d) Dubinin-Raduskavich-Kaganer with their correlation coefficient values obtained at within-range optimized fixed parameters (pH 8, 113 min contact time, and 122 mg/100 mL rGO/γ-Fe2O3 dose) with 20, 40, 60 80 and 100 ppm MG dye solution at 25 °C.
