Adsorption Behavior of Azo Dye Eriochrome Black T from Aqueous Solution by β-Cyclodextrins/Polyurethane Foam Material

Abstract

β-cyclodextrin/polyurethane (β-CD/PU) materials were prepared by foaming technique. The adsorption behavior of EBT on β-CD/PU material and the influences on the adsorption efficiency were investigated. Under the optimal experimental conditions, the maximum adsorption efficiency of EBT was 93.14%. The kinetics characteristic and thermodynamic parameters were analyzed. The experimental isotherms data were analyzed using Langmuir and Freundlich isotherm equations and the results indicated that the Langmuir isotherm showed a better fit for EBT adsorption. The experimental results suggest that the β-CD/PU foam materials have potential application for the wastewater treatment containing EBT dye.

Keywords:

• Adsorption behavior
• Dye wastewater
• Dynamic analysis
• Foam material
• Polyurethane

ACKNOWLEDGMENT

This project was supported by the Agricultural Independent Innovation of Jiangsu Province (CX(11)2032), China Postdoctoral Science Foundation (2011M500865), Jiangsu Planned Projects for Postdoctoral Research Funds (1002033C) and the Innovation Program for Graduate Education of Jiangsu Province (CXZZ12_0696).