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Sorption of iodine on Mg-Al-layered double hydroxide

Published online by Cambridge University Press:  09 July 2018

H. Curtius  and
Z. Kattilparampil
H. Curtius*
Affiliation:
Institute for Safety Research and Reactor Technology, Forschungszentrum Jülich, D-52425 Jülich, Germany
Z. Kattilparampil
Affiliation:
Institute for Safety Research and Reactor Technology, Forschungszentrum Jülich, D-52425 Jülich, Germany
*
E-mail: h.curtius@fz-juelich.de
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Abstract

From leaching experiments with metallic uranium-aluminium material test reactor fuel elements in repository-relevant MgCl2-rich salt brines, a Mg-Al-layered double hydroxide with chloride as interlayer anion was identified as a crystalline secondary phase component. In the present study, this Mg-Al-Cl-layered double hydroxide (Mg-Al-Cl-LDH) was synthesized and its ability to adsorb iodine was evaluated. The adsorption of I– was rapid, and equilibrium for an initial concentration of 4.25 x 10-5 mole/l was obtained within 48 h. Further results indicated that the adsorption isotherm for I– retention could be fitted to Freundlich and Dubinin-Radushkevich equations. The values obtained indicate that iodine is adsorbed on Mg-Al-Cl-LDH by an anion- exchange process. The adsorption of I– was also studied as a function of pH. In the pH range between 3.5 and 8.5, the adsorption was independent of the pH. The effects of competiting anions were investigated using an MgCl2-solution instead of water, and indicate that chloride anions have a greater affinity towards the Mg-Al-Cl-layered double hydroxide than iodine.

Keywords

hydrotalciteiodinesorption
Type
Research Article
Information
Clay Minerals , Volume 40 , Issue 4 , December 2005 , pp. 455 - 461
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 2005

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References

Brücher, H., Curtius, H. & Fachinger, J. (2001) R&D for back-end options for irradiated research reactor fuel in Germany. Transactions of the 5th Topical Meeting on Research Reactor Fuel Management, April 1–3, 2001, Aachen, Germany, ENS RRFM.Google Scholar
Cavani, F., Trifiro, F. & Vaccari, A. (1991) Hydrotalcite- type anionic clays: preparation, properties and applications. Catalysis Today, 11, 173–301.CrossRefGoogle Scholar
Chatelet, L., Bottero, J.Y., Yvon, J. & Bouchelaghem, A. (1996) Competition between monovalent and diva- lent anions for calcinated and uncalcinated hydroalcite: anion exchange and adsorption sites. Colloids and Surfaces A. Physicochemical and Engineering Aspects, 111, 167–175.CrossRefGoogle Scholar
Giles, C.H., MacEwan, T.H., Nakhwa, S.N. & Smith, D. (1960) Studies in adsorption. Part XI. A system of classification of solution adsorption isotherms, and its use in diagnosis of adsorption mechanisms and in measurement of specific surface areas of solids. Journal of the Chemical Society, 3973–3993.Google Scholar
Khan, S.A., Reman, R.-U. & Khan, M.A. (1995) Adsorption of Cs(I), Sr(II) and Co(II) on Al2O3. Journal of Radioanalytical and Nuclear Chemistry, 190, 81–96.Google Scholar
Mazeina, L., Curtius, H., Fachinger, J. & Odoj, R. (2003) Characterisation of secondary products of uranium- aluminium material test reactor fuel element corrosion in repository-relevant brine. Journal of Nuclear Material, 323, 1–7.Google Scholar
Miyata, S. (1975) The synthesis of hydrotalcite-like compounds and their structures and physico-chemical properties. Clays and Clay Minerals, 31, 369–375.Google Scholar
Miyata, S. (1983) Anion-exchange properties of hydrotalcite-like compounds. Clays and Clay Minerals, 31, 305–311.Google Scholar
Rancon, D. (1988) Comparative study of radioactive iodine behavior in soils under various experimental and natural conditions. Radiochimica Acta, 44/45, 187–193.Google Scholar
Toraishi, T., Nagasaki, S. & Tanaka, S. (2002) Adsorption behavior of IO3 - by CO3 2-- and NO3 --hydrotalcite. Applied Clay Science, 22, 17–23.CrossRefGoogle Scholar
Ulibarri, M.A., Pavlovic, I., Barriga, C., Hermosín, M.C. & Cornejo, J. (2001) Adsorption of anionic species on hydrotalcite-like compounds: effect of interlayer anion and crystallinity. Applied Clay Science, 18, 17–27.CrossRefGoogle Scholar
Weiss, A. & Toth, E. (1996) Untersuchungen zur Synthese, Quellungseigens chaften und Anionenaustausch von kristallchemisch modifizierten Doppelhydroxiden vom Hydrotalkit-Typ. Jahrestagung der DTTG-Freiberg, pp. 267–276.Google Scholar