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

Figure 6

(a) Pseudo-first-order model fit for the adsorption of Cr(VI) by NH₂-MCM-41. (b) Pseudo-second-order model fit for the adsorption of Cr(VI) by NH₂-MCM-41. (c) Intraparticle diffusion model fit for the adsorption of Cr(VI) by NH₂-MCM-41.

(a)

(b)

(c)