Hostname: page-component-cd9895bd7-dk4vv Total loading time: 0 Render date: 2024-12-18T18:48:24.182Z Has data issue: false hasContentIssue false
  • English
  • Français

131I− Sorption by Thermally Treated Hydrotalcites

Published online by Cambridge University Press:  28 February 2024

María Teresa Olguín ,
Pedro Bosch ,
Dwight Acosta  and
Silvia Bulbulian
María Teresa Olguín
Affiliation:
Instituto Nacional de Investigaciones Nucleates, A.P. 18-1027, Col. Escandón, Delegación Miguel Hidalgo, C.P. 11801, México, D.F.
Pedro Bosch
Affiliation:
Universidad Autónoma Metropolitana, Iztapalapa, Michoacán y Purísima, A.P. 55-532, Iztapalapa, C.P. 09340, México, D.F.
Dwight Acosta
Affiliation:
Universidad Nacional Autónoma de México, Instituto de Física de la UNAM, Ciudad Universitaria A.P. 70-360, C.P. 04510, México, D.F.
Silvia Bulbulian
Affiliation:
Instituto Nacional de Investigaciones Nucleates, A.P. 18-1027, Col. Escandón, Delegación Miguel Hidalgo, C.P. 11801, México, D.F.
Rights & Permissions [Opens in a new window]

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

The sorption capacity of hydrotalcite (HT) and its calcined product (CHT) was evaluated for 131I− sorption from water solution and it was determined as a function of the calcining temperature. The radionuclide content was determined by γ-spectrometry. Solids were characterized by thermal analysis, X-ray diffraction (XRD), electron microscopy and Brunauer-Emmett-Teller (BET) analysis. For 0.1 M Na I solution, labeled with 131I−, sorption capacity was found to be 0.24 meq g−1 (7.2% of the anion exchange capacity, AEC). But, if the sample was previously calcined at 773 K and the HT structure destroyed, the sorption of I− increased considerably, up to 2.08 meq g−1 (63% of the AEC) and the HT structure was reconstructed. The 131I− sorption at very low concentrations (10−14M) was 0.04 × 10−14 meq of 131I− g−1 in the noncalcined HT, but for calcined samples at 773 K, the sorption increased to circa 0.97 × 10−14 meq g−1. Calcination temperature determines the surface area of the resulting mixed oxides, and that property seems to be the most important factor controlling the I− sorption. If the calcination temperature was increased to 873 K, the specific surface area of the oxide mixture increased and I− sorption increased as well, whereas calcination of HT at 973–1073 K resulted in a low surface area and a low I− retention.

Keywords

Hydrotalcites131I−131I− SorptionAnion ExchangeMagnesium Aluminum OxideRadioactive WasteRadioactive DecontaminationThermal Treatment
Type
Research Article
Information
Clays and Clay Minerals , Volume 46 , Issue 5 , October 1998 , pp. 567 - 573
Copyright
Copyright © 1998, The Clay Minerals Society

References

Atkins, M. Glasser, F.P., Oversby, V.M. and Brown, P.W., 1990 Encapsulation of radioiodine in cementitious waste forms Proc Mater Res Soc Symp; 1989 15–22.CrossRefGoogle Scholar
Cavani, F. Trifiro, F. and Vaccani, A., 1991 Hydrotalcite-type anionic clays: Preparation, properties and applications Catal Today 11 173–301 10.1016/0920-5861(91)80068-K.CrossRefGoogle Scholar
Chatelet, L. Bottero, J.Y. Yvon, J. and Bouchelaghen, A., 1996 Competition between monovalent and divalent anions for calcined and uncalcined hydrotalcites: Anion exchange and adsorption sites Colloids Surf A 111 167–175 10.1016/0927-7757(96)03542-X.CrossRefGoogle Scholar
Choudhary, U.R. and Pandit, M.Y., 1991 Surface properties of magnesium oxide obtained from magnesium hydroxide Appl Catal 71 265–274 10.1016/0166-9834(91)85084-9.CrossRefGoogle Scholar
Hermosin, M.C. Pavlovic, I. Ulibarri, M.A. and Cornejo, J., 1993 Trichlorophenol adsorption on layered double hydroxide: A potential sorbent J Environ Sci Health A 28 1875–1888.Google Scholar
Hermosin, M.C. Pavlovic, I. Ulibarri, M.A. and Cornejo, J., 1996 Hydrotalcite as sorbent for trinitrophenol sorption capacity and mechanism Water Res 30 171–177 10.1016/0043-1354(95)00088-3.CrossRefGoogle Scholar
Kopka, H. Beneke, K. and Lagaly, G., 1988 Anionic surfactants between double metal hydroxide layers J Colloid Interface Sci 123 427–436 10.1016/0021-9797(88)90263-9.CrossRefGoogle Scholar
McKenzie, A.L. Fishel, C.T. and Davis, R.J., 1992 Investigation of the surface structure and basic properties of calcined hydrotalcites J Catal 138 547–561 10.1016/0021-9517(92)90306-3.CrossRefGoogle Scholar
Misra, C. and Perrotta, J., 1992 Composition and properties of synthetic hydrotalcites Clays Clay Miner 40 145–150 10.1346/CCMN.1992.0400202.CrossRefGoogle Scholar
Miyata, S., 1973 Synthesis of new hydrotalcite-like compounds and their physico-chemical properties Chem Lett X 843–848 10.1246/cl.1973.843.CrossRefGoogle Scholar
Miyata, S., 1975 The synthesis of hydrotalcite-like compounds and their structures and physico-chemical properties-I: The systems Mg2+-Al3+-NO3 -, Mg2+-Al3+-Cl-, Mg2+-Al3+-ClO4 −, Ni2+-Al3+-Cl- and Zn2+Al3+-Cl− Clays Clay Miner 23 369–375 10.1346/CCMN.1975.0230508.CrossRefGoogle Scholar
Miyata, S., 1980 Physico-chemical properties of synthetic hydrotalcites in relation to composition Clays Clay Miner 28 50–56 10.1346/CCMN.1980.0280107.CrossRefGoogle Scholar
Miyata, S., 1983 Anion exchange properties of hydrotalcite-like compounds Clays Clay Miner 31 305–311 10.1346/CCMN.1983.0310409.CrossRefGoogle Scholar
Olguín, M.T., 1994 Fijación de uranio y productos de fisión del U235 en arcillas y zeolitas México, D.F. Universidad Autónoma Metropolitana.Google Scholar
Olguín, M.T. Solache-Ríos, M. Iturbe, J.L. Bosch, P. and Bulbulian, S., 1996 Sorption of 239Np and 235U fission products by zeolite Y, Mexican natural erionite and bentonite Sep Sci Technol 31 2021–2044 10.1080/01496399608001029.CrossRefGoogle Scholar
Oscarson, D.W. Miller, H.G. and Watson, R.L., 1986 An evaluation of potential additives to a clay-based buffer material for the immobilization of I-129 1–24.Google Scholar
Reichle, W.T., 1985 Catalysis reaction by thermally activated synthesis, anionic. Clay minerals J Catal 94 547–557 10.1016/0021-9517(85)90219-2.CrossRefGoogle Scholar
Reichle, W.T., 1986 Synthesis of anionic clay minerals (mixed metal hydroxides, hydrotalcite) Solid State Ionics 22 135–141 10.1016/0167-2738(86)90067-6.CrossRefGoogle Scholar
Reichle, W.T. Kang, S.Y. and Fuerhardt, D.S., 1986 The nature of the thermal decomposition of a catalyticaily active anionic clay mineral J Catal 101 352–359 10.1016/0021-9517(86)90262-9.CrossRefGoogle Scholar
Rey, F. Fornes, V. and Rojo, J.M., 1992 Thermal decomposition of hydrotalcites J Chem Soc, Faraday Trans 88 2233–2238 10.1039/FT9928802233.CrossRefGoogle Scholar
Sato, T. Fujita, H. Endo, T. Shimada, M. and Tsunashima, A., 1988 Synthesis of hydrotalcite-like compounds and their physico-chemical properties React Solids 5 219–228 10.1016/0168-7336(88)80089-5.CrossRefGoogle Scholar
Sato, T. Kato, K. Endo, T. and Shimada, M., 1986 Preparation and chemical properties of magnesium aluminum oxide solid solutions React Solids 2 253–260 10.1016/0168-7336(86)80088-2.CrossRefGoogle Scholar
Sato, T. and Okuwaki, A., 1991 Intercalation of benzenecarboxilate ions into the interlayer of hydrotalcite Solid State Ionics 45 43–48 10.1016/0167-2738(91)90101-G.CrossRefGoogle Scholar
Ulibarri, M.A. Hernández, M.J. and Cornejo, J., 1987 Changes in textural properties derived from the thermal decomposition of synthetic pyroaurite Thermochim Acta 113 79–86 10.1016/0040-6031(87)88310-7.CrossRefGoogle Scholar