Evaluation of sorption of uranium onto metakaolin using X-ray photoelectron and Raman spectroscopies

JR Memon, KR Hallam, MI Bhanger, A El-Turki, GC Allen

Research output: Contribution to journalArticle (Academic Journal)peer-review

22 Citations (Scopus)

Abstract

Metakaolin prepared from a natural clay mineral ore of aluminium kaolinite is a promising low cost and high activity aluminosilicate material that has been investigated for studying the sorption behavior of uranium. Here, metakaolin was characterized using X-ray photoelectron spectroscopy (XPS) and the effects of pH, contact time and initial metal ion concentration on its sorption behavior were studied. The sorption process was found to initially be rapid (similar to 60% at time 0 min) but became slower with time; equilibrium was established within 24 h (similar to 80% sorption). The data were applied to study the kinetics of the sorption process. The Langmuir and Dubinin-Radushkevich (D-R) sorption isotherms were used to describe partitioning behavior for the system at room temperature. The binding of metal ions was found to be pH dependent, with optimal sorption occurring at pH 5. The retained metal ions were eluted with 5 mL of 0.1 M HNO3. Raman spectroscopy and XPS were used to evaluate the sorption mechanism of U(VI). (C) 2008 Elsevier B.V. All rights reserved.
Translated title of the contributionEvaluation of sorption of uranium onto metakaolin using X-ray photoelectron and Raman spectroscopies
Original languageEnglish
Pages (from-to)69 - 73
Number of pages5
JournalAnalytica Chimica Acta
Volume631
DOIs
Publication statusPublished - Oct 2008

Bibliographical note

Publisher: ELSEVIER SCIENCE BV, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS

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