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

Abstract:

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-Al LDH material may be become an effective adsorbent for removal CR dye in aqueous solution.

• Periodical: Solid State Phenomena (Volume 298)
• Pages: 128-132
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.298.128
• Online since: October 2019
• Authors: To Uyen T. Dao, Hong Tham T. Nguyen, Do Trung Sy, Khoa Hien Nguyen, Anh Tien Nguyen, Trung Thanh Nguyen, Trinh Duy Nguyen*
• Keywords: Ca-Al Layer Double Hydroxide, Congo Red Dye, Optimized Condition, RSM

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