Figure 6

The second-order kinetic model for the adsorption of Cr(VI) on persulfate-modified AC (Temperature: 298.15Â K, Speed: 150Â rpm, Cr: 100Â mg L-1, Adsorbent mass: 0.03Â g, and Solution volume: 10Â mL).
The second-order kinetic model for the adsorption of Cr(VI) on persulfate-modified AC (Temperature: 298.15Â K, Speed: 150Â rpm, Cr: 100Â mg L-1, Adsorbent mass: 0.03Â g, and Solution volume: 10Â mL).