Preparation of Novel Types of Ion Exchange Regins Containing Calixarene Derivatives

Abstract

Three novel types of ion exchange regins containing calixarene tetraacetic acid have been prepared to investigate metal adsorption behavior by batch-wise and column chromatographical methods. Metal selectivity of the resins for divalent metals is as follows: Pb (II) >>Cu (II) >Zn (II) ≥Ni (II) ≥Co (II) . Since the adsorption property as the selectivity and so on is similar to the extraction one of calixarene derivatives as solvent extraction reagents, the derivatives were found to be resinificated with keeping the extraction property. Maximum loading capacity of lead on the resin is deeply related not only to flexibility of calixarene moiety in the resin as the adsorption stoichiometry of calixarene and lead is same to be 1: 2 as the extraction one, but also to content of calixarene moiety per resin weight. The lead loading capacity of the crosslinked resin is higher than those of the supported and the impregnated resins. Column chromatographical separation of divalent lead and zinc by the resins has been effectively achieved. The prepared resins show sodium effect for enhanced metal adsorption similar to the enhanced metal extraction with calix [4] arene tetraacetic acid.