A novel extractant-impregnated resin containing carminic acid for selective separation and pre-concentration of uranium(VI) and thorium(IV) |
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Authors: | Ahmad Hosseini-Bandegharaei Mohammad Saeid Hosseini Yousef Jalalabadi Mehdi Nedaie Masoud Sarwghadi Akram Taherian |
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Institution: | 1. Department of Engineering , Kashmar Branch, Islamic Azad University , Kashmar, P.O. Box 102, Iran ahoseinib@yahoo.com ahoseinib@iaukashmar.ac.ir;3. Department of Chemistry , Faculty of Science, University of Birjand , Birjand, P.O. Box 414, Iran;4. Department of Engineering , Kashmar Branch, Islamic Azad University , Kashmar, P.O. Box 102, Iran |
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Abstract: | The present work proposes the use of a novel extractant-impregnated resin (EIR) as an adsorbent in trace separation and pre-concentration of U(VI) and Th(IV) ions. The new EIR was prepared by impregnating carminic acid onto Amberlite XAD-16 resin beads. The morphology of new EIR was studied by BET surface area measurements and SEM micrographs. A column packed with CA/XAD-16 was used for selective separation and pre-concentration of the metal ions. Maximum adsorption of Th(IV) and U(VI) ions occurred at pHs of 3.50–5.75 and 3.75–6.50, respectively. The adsorbed metals could be eluted sequentially using 0.55?mol?L?1 HCl for U(VI) and 2.25?mol?L?1 HCl for Th(IV). The dynamic capacity of EIR was found to be 0.832 and 0.814?mmol?g?1 for Th(IV) and U(VI), respectively. The tolerance limit of some foreign ions was also studied. The proposed method showed a good performance in analyzing geological reference materials and a synthetic seawater sample. Furthermore, the above procedure was successfully employed for the analysis of natural water samples. |
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Keywords: | extractant-impregnated resin U(VI) and Th(IV) separation carminic acid amberlite XAD-16 |
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