Figure 5

Equilibrium adsorption of (a) methylene blue and (b) congo red (adsorbent mass: 50 mg, solution volume: 50 mL, dye concentration: 5–1,000 mg/L at room temperature for 72 h; lines were predicted by Langmuir isotherm model).
Equilibrium adsorption of (a) methylene blue and (b) congo red (adsorbent mass: 50 mg, solution volume: 50 mL, dye concentration: 5–1,000 mg/L at room temperature for 72 h; lines were predicted by Langmuir isotherm model).