Adsorptive Neodymium Ions Properties of Chitosan Modified by Calixarene

Abstract:

Chitosan was coated and modified by calix［8］arene, calix［6］arene and calix［4］arene, and the adsorption properties of neodymium ion were studied. The study show that calixarene is coated on the surface of chitosan mostly depending on the effect between hydrogen bond and chitosan.Adsorbance of neodymium ion by chitosan coated with calix［6］arene or calix［8］arene is far more than that of chitosan,while adsorbance of neodymium ion by chitosan coated with calix［4］arene is smaller. However, when the equilibrium concentration of neodymium ion is lower, the adsorbance of neodymium ion by chitosan coated with calix［4］arene is still more than that of chitosan. At the same time the relationship of adsorption capacity of calixarene coated chitosan and pH value was studied.

Key words:calixarene; chitosan; neodymium ion; adsorption isotherm