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Abstract
The article describes a convenient synthesis and Cr(VI) extraction efficiency of a novel p- tert-butylcalix[8]areneoctamide impregnated Amberlite (XAD-4) resin. Using p- tert-butylcalix[8]arene macrocyclic building block, two strategies have been developed; i.e., derivatization of p- tert-butylcalix[8]arene framework with sophisticated ionophoric groups having efficiency to extract oxoanions from aqueous media and, impregnation of p- tert-butylcalix[8]arene derivative onto the polymeric support. Liquid–liquid and solid–liquid extraction experiments have been performed to evaluate the Cr(VI) extraction efficiency of both p- tert-butylcalix[8]arene derivative and the impregnated resin. From the results, it has been deduced that solid-phase extraction method is more convenient and efficient than liquid–liquid extraction process. The impregnated XAD-4 resin has been found regenerable with better extracting efficiency as compared to the simple p- tert-butylcalix[8]areneoctamide ionophore.
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