Adsorption Isotherms and Kinetic Models for Congo Red Adsorption on Ca-AI Layer Double Hydroxide Adsorbent

摘要

The equilibrium and physicochemical properties of the Ca-Al LDH material were determined in this study. Kinetic data were analyzed using isothermal models including Langmuir, Freundlich, Temkin and Dubinin-Radushkevich. Adsorption behavior is well described by the Langmuir isotherm and the pseudo-second-order model. The maximum adsorption capacity of CR on Ca-Al LDH is found to be 72.569 mg/g. The uptake results indicated that the adsorption process was controlled by chemical processes and single-layer adsorption. Due to, the Ca-AI LDH material may be become an effective adsorbent for removal CR dye in aqueous solution.