Research Article

Removal of Methylene Blue from Aqueous Solution Using Agricultural Residue Walnut Shell: Equilibrium, Kinetic, and Thermodynamic Studies

Figure 3

Effect of initial pH on MB adsorption (conditions: temperature (298 K), dye concentration (20 mg/L), particle size (80 mesh), adsorbent dosage (1.25 g/L), and contact time (2 h)).