Adsorption Properties of Dye onto Mg/Al-CO₃ Layered Double Hydroxide

Abstract:

Adsorption of reactive red on Mg/Al-CO₃ layered double hydroxide in a batch stirred system was investigated. Experiments were carried out as function of Mg/Al molar ratio, contact time, initial pH, adsorbent amount and temperature. It was found that the maximum dye removal was at Mg/Al molar ratio of 3. Solution pH ranging from 2-8 had little effect on adsorption rate. Dye removal decreased with increased temperature in studied temperature range. The Langmuir and Freundlich isotherm models were used for modeling the adsorption equilibrium. The adsorption equilibrium data could well interpreted by the Langmuir models with maximum adsorption capacity of 131.58 mg/g (R²=0.9986). The results indicate the possible dye removal from water by using Mg/Al-CO₃ layered double hydroxide.

• Periodical: Advanced Materials Research (Volumes 455-456)
• Pages: 677-682
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.455-456.677
• Online since: January 2012
• Authors: Li Fang Zhang, De Zhou Wei
• Keywords: Adsorption, Dye, Layered Double Hydroxides (LDHs)

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