Figure 5
From: Adsorption of an anionic dye (Congo red) from aqueous solutions by pine bark
Effect of the pine bark dosage on Congo red adsorption capacity at (a) natural pH and (b) pH = 2 and on removal efficiency at (c) natural pH and (d) pH = 2 (temperature = 25 °C; initial dye concentration = 5 mg L−1). Experimental data and fitting to pseudo-second order kinetic model.
