Qureshi, ImdadullahMemon, ShahabuddinYılmaz, Mustafa2020-03-262020-03-2620090304-38941873-3336https://dx.doi.org/10.1016/j.jhazmat.2008.08.076https://hdl.handle.net/20.500.12395/23521The 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-butyllcalix[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. (c) 2008 Elsevier B.V. All rights reserved.en10.1016/j.jhazmat.2008.08.076info:eu-repo/semantics/closedAccessCalixareneDichromateImpregnationSorptionLangmuir/Freundlich isothermSolid-phase extractionArticle16402.03.202067568218829160Q1WOS:000265358400038Q1