Selective Adsorption of Lead Ion on Calix[4]arene Carboxylate Resin Supported by Polyallylamine

Abstract

A calix[4]arene carboxylate resin was prepared by calix[4]arene carboxylate on polymer matrices of polyallylamine to investigate the resin's adsorption behavior for some metal ions including lead ion. The selectivity sequence among the base metal ions on the resin is as follows:Pb bb Cu bb Zn 6 Ni 6 CoThe origin of the selectivity sequence is attributed not to amino groups of the polymer matrices but to the functional groups of calix[4]arene carboxylate introduced. Although maximum loading capacity for lead ion on the resin was not very high, it shows high lead selectivity and the separation of trace amount of lead from large excess of zinc was completely achieved.

Adsorption of heavy rare earth(III) with extraction resin containing bis(2,4,4-trimethylpentyl) monothiophosphinic acid

“…Since the mid of 1970s, extraction resins (previously called Levextrel resins) have acquired great importance as a technique with interesting features for the recovery and chromatographic separation of metal ions because they combine the advantages of high selectivities typical of solvent extraction and high efficiencies typical of chromatographic separation [8][9][10]. The adsorption of metal ions using the resins containing organophosphorus acids has been reported by many authors [11][12][13][14][15][16].…”

Preparation of Novel Crosslinking Type Resins Based on Calix[4]arene Tetracarboxylate with High Selectivity and High Loading Capacity for Lead Ion

“…The resin was prepared by means of condensation of 25,26,27,28tetrakis(carboxymethoxy)calix [4]arene in cone conformation (abbreviated as [4]CH2COOH) using s-trioxane as crosslinking reagent in the presence of acetic acid together with sulfuric acid as a catalyst as described in the previous paper. [6] In the present work, the reaction ratio of [4]CH2COOH to trioxane was changed from 1:5 to 1:1 (mol/mol). The resin prepared by the ratio 1:…”

“…We have also been attracted to their ionic recognition property and have employed them not only as solvent extraction reagents, but also as ion exchange resins for practical use in recent years. [3][4][5] We have prepared three types of ion exchange resins including calixarene moieties. The first is chemically supported onto polyallylamine, the second is that the solvent extraction reagents are incorporated into macroporous polymer matrix.…”

“…In the present paper, we report on crosslinking type resins based on calix [4]arene with higher loading capacity to divalent metal ions. Solubility of the resins to some organic solvents and inorganic solutions was examined.…”

Adhesives for bead fusion of recycled expandable polystyrene

“…Some of these metals such as cadmium, mercury, copper, and lead are toxic and pose a threat to human health 23. From an environmental and economic viewpoint, there remains a need to discover more selective and effective extractants for such toxic heavy metals 24–43…”