Comparative and Equilibrium Studies on Anionic and Cationic Dyes Removal by Nano-Alumina-Doped Catechol Formaldehyde Composite

Figure 5

Langmuir isotherm at various temperatures of (a) CR and (b) SF; Freundlich isotherm at various temperatures of (a) CR and (b) SF.

(a)

(b)

(c)

(d)