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

Figure 2

(a) Effects of different pH values on the adsorption of Cd(II) and Hg(II) ions by XLAC (adsorption experiments, Cd(II): m = 50 mg, V = 50 mL, = 0.01 mol·L⁻¹, T = 40°C, t = 300 min, revolution rate = 200 revolutions·min⁻¹, and pH values ranged from 2.5 to 6.0; Hg(II): m = 50 mg, V = 50 mL, = 0.01 mol·L⁻¹, T = 40°C, t = 300 min, revolution rate = 200 revolutions·min⁻¹, and pH values ranged from 2.5 to 6.0). (b) Effects of different initial metal ion concentrations on the adsorption of Cd(II) and Hg(II) by XLAC (adsorption experiments, Cd(II): m = 50 mg, V = 50 mL, pH = 5.5, T = 40°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 = 40°C, t = 300 min, revolution rate = 200 revolutions·min⁻¹, and ranged from 0.0035 to 0.0065 mol·L⁻¹).

(a)

(b)