Figure 3
From: Hierarchical Porous Chitosan Sponges as Robust and Recyclable Adsorbents for Anionic Dye Adsorption
(a) The RB solutions before (100 mg/L) and after adsorption (0.5 mg/L) and the Ch-5 sponge after dye adsorption. (b) FT-IR spectra of a Ch-5 sponge, an RB adsorbed Ch-5 sponge and RB powders. (c) The qe of chitosan sponges derived from different chitosan concentrations under different adsorption temperatures. (d) Adsorption isotherm of RB adsorption by Ch-5 sponges at 30 °C. (e) Fit of the equilibrium data with the Langmuir isotherm model. (f) Fit of the equilibrium data with the Freundlich isotherm model.
