Investigating Methylene Blue Removal from Aqueous Solution by Cysteine-Functionalized Mesoporous Silica

Figure 8

Effect of contact time for MB removal by MSNs-Cys from aqueous solution at (a) pH 1.5, (b) pH 7, and (c) pH 8.5 (150 ppm, 25°C, and 150 rpm).

(a)

(b)

(c)