Figure 9
The effect of contact time (a), the photograph of visual changes at different contact time (b), the non-linear relationship of kinetic models for MB dye adsorption process (c), and linear relationship for intra-particle diffusion model (d) (at pH: 10, optimal adsorbent dose, temperature:25 °C, dye concentration: 20 mg L−1, mixing speed of 500 rpm).
