Removal of Phenolic Compounds from Aqueous Solutions using Ionic Interaction between Cyclodextrin Derivatives and Chitosan

抄録

Removal of phenolic compounds, such as bisphenol A (BPA), from their aqueous solutions by the system based on the ionic complex of poly-carboxymethylated β-cyclodextrin (CM-β-CD) and chitosan was investigated. The β-cyclodextrin was reacted with monochloroacetic acid to yield CM-β-CD as Na salt After treatment of the obtained CM-β-CD with cation exchanger, the CM-β-CD and chitosan formed an ionic complex and worked as an adsorption system for BPA This system is based on the inclusion phenomenon between of BP A and CM-β-CD and the ionic interaction between the CM-β-CD and chitosan. The adsorbed BPA was released by treatment of the CM-β-CD/chitosan complex with 50-vol% ethanol and the refreshed complex adsorbed BPA again. This adsorption system can be prepared more easily compared to the systems based on chitosan bearing CD derivatives by covalent bond or to the system consisted of cationic CD derivatives.