Competitive Adsorption of Cadmium(II) and Mercury(II) Ions from Aqueous Solutions by Activated Carbon from Xanthoceras sorbifolia Bunge Hull

Figure 3

(a) Effects of the initial concentrations of Cd(II) and Hg(II) on the adsorption capacity of XLAC (adsorption experiments, Cd(II): m = 50 mg, V = 50 mL, pH = 5.5, T = 35°C, 40°C, and 45°C, t = 300 min, revolution rate = 200 revolutions·min⁻¹, and ranged from 0.0035 to 0.0065 mol·L⁻¹; Hg(II): m = 50 mg, V = 50 mL, pH = 5.5, T = 35°C, 40°C, and 45°C, t = 300 min, revolution rate = 200 revolutions·min⁻¹, and ranged from 0.0035 to 0.0065 mol·L⁻¹). (b) Langmuir equation fitting curves for Cd(II) and Hg(II) experimental data (adsorption experiments, Cd(II): m = 50 mg, V = 50 mL, = 0.0052 mol·L⁻¹, pH = 5.5, T = 40°C, t = 300 min, and revolution rate = 200 revolutions·min⁻¹; Hg(II): m = 50 mg, V = 50 mL, = 0.0052 mol·L⁻¹, pH = 5.5, T = 35°C, 40°C, and 45°C, t = 300 min, and revolution rate = 200 revolutions·min⁻¹). (c) Freundlich equation fitting curves for Cd(II) and Hg(II) experimental data (adsorption experiments, Cd(II): m = 50 mg, V = 50 mL, = 0.0052 mol·L⁻¹, pH = 5.5, T = 40°C, t = 300 min, and revolution rate = 200 revolutions·min⁻¹; Hg(II): m = 50 mg, V = 50 mL, = 0.0052 mol·L⁻¹, pH = 5.5, T = 35°C, 40°C, and 45°C, t = 300 min, and revolution rate = 200 revolutions·min⁻¹).

(a)

(b)

(c)