Cr(VI) Removal from Aqueous by Adsorption on Amine-Functionalized Mesoporous Silica Prepared from Silica Fume

Figure 5

The Cr(VI) adsorption capacity and removal efficiency as functions with contact time (solution volume 100 mL, adsorbent 20 mg, 200 rpm, 25°C, initial Cr(VI) concentration 40 mg/L).