Comparison on the Surface Structure Properties along with Fe(II) and Mn(II) Removal Characteristics of Rice Husk Ash, Inactive Saccharomyces cerevisiae Powder, and Rice Husk

Figure 2

The Fe(II) and Mn(II) adsorption characteristics of the three adsorbents at different (a-b) pH ranged from 1 to 8; (c-d) contact time at 5 min, 10 min, 20 min, 30 min, 40 min, 50 min, 60 min, 70 min, 80 min, and 90 min; (e-f) initial metal ion concentrations are 5 mg/L, 10 mg/L, 15 mg/L, 20 mg/L, 25 mg/L, 30 mg/L, 35 mg/L, and 40 mg/L; (g-h) adsorbents dosage at the levels of 0.2 g/100 mL, 0.4 g/100 mL, 0.6 g/100 mL, 0.8 g/100 mL, 1.0 g/100 mL, 1.2 g/100 mL, and 1.5 g/100 mL. In addition, (a), (c), (e), and (g) indicate the results about the Fe(II) removal and (b), (d), (f), and (h) show the removal of Mn(II). All the results mentioned above were given as the mean of the triplicate.

(a)

(b)

(c)

(d)

(e)

(f)

(g)

(h)