Figure 4
From: Hierarchical Porous Chitosan Sponges as Robust and Recyclable Adsorbents for Anionic Dye Adsorption
(a) Time-dependent adsorption of RB by Ch-5 sponges in RB solutions with different C0: 5, 10, 20, 50, 70, 100, 150, and 200 mg/L. The adsorption is carried out at 30 °C. (b) Pseudo-first-order model for the adsorption process in RB solution with different initial concentrations. (c) Pseudo-second-order model for the adsorption process in RB solution with different initial concentrations. (d) Experimental adsorption capabilities of Ch-5 sponges compared with the corresponding adsorption capacities simulated by pseudo-first-order and pseudo-second-order models in different C0. (e) Intra-particle diffusion model for the adsorption process in RB solution with different initial concentrations. (f) Plots of 1/T versus ln (qe/Ce) for the RB adsorption at 30, 40, and 50 °C.
