Characterization of Portuguese geomaterials, the clay component of rañas, as potential liners for low and intermediate radioactive disposal sites.

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  • Additional Information
    • Subject Terms:
    • Author-Supplied Keywords:
      FES
      Raña deposits
      Radioactive wastes
      Radiocaesium
      RIP
    • NAICS/Industry Codes:
      325180 Other Basic Inorganic Chemical Manufacturing
      212324 Kaolin and Ball Clay Mining
      212326 Shale, clay and refractory mineral mining and quarrying
      325199 All Other Basic Organic Chemical Manufacturing
      325190 Other basic organic chemical manufacturing
      562210 Waste treatment and disposal
      562211 Hazardous Waste Treatment and Disposal
      325189 All other basic inorganic chemical manufacturing
    • Abstract:
      Safety assessment of low and intermediate level waste (LILW) repositories requires the understanding of radionuclides sorption-desorption mechanisms, mainly the degree of interaction between radionuclides and mineral surfaces. Among the different radionuclides that are part of the Portuguese radwastes' inventory Cs is one of the most important from the radiological point of view due to its high radiotoxicity. The clay component of natural geomaterials termed rañas, originated from an area located in the NE Mainland of Portugal, was studied for their potential as effective barriers. These geomaterials (grains-size fractions <63 μm, <36 μm) were characterized in terms of cationic exchange capacity (CEC), frayed edge sites (FES) and radiocaesium interception potential (RIP). Organic matter content and pH were also determined. The fractions were mineralogically analyzed by X-ray diffraction and by instrumental neutron activation analysis (INAA) for chemical elemental composition. Smectite (montmorilonite), illite, kaolinite were identified. The capacity of FES is related to the samples granulometry as opposed to what was observed for CEC and RIP. The behavior of rañas was not similar for all samples which may be related to differences in mineralogy. Future studies with regard to the behaviour of radiocaesium are expected to clarify the possible application of these geomaterials as liner/backfill/buffer for a LILW repository. [ABSTRACT FROM AUTHOR]
    • Abstract:
      Copyright of Journal of Radioanalytical & Nuclear Chemistry is the property of Springer Nature and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
    • Author Affiliations:
      1Nuclear and Technological Institute (ITN), Sacavém Portugal
      2Faculty of Sciences/University of Porto, Porto Portugal
      3Faculty of Sciences/University of Lisbon, Lisbon Portugal
    • ISSN:
      0236-5731
    • Accession Number:
      10.1007/s10967-010-0715-1
    • Accession Number:
      55642732
  • Citations
    • ABNT:
      ANDRADE, E. et al. Characterization of Portuguese geomaterials, the clay component of rañas, as potential liners for low and intermediate radioactive disposal sites. Journal of Radioanalytical & Nuclear Chemistry, [s. l.], v. 286, n. 3, p. 777–783, 2010. DOI 10.1007/s10967-010-0715-1. Disponível em: http://widgets.ebscohost.com/prod/customlink/proxify/proxify.php?count=1&encode=0&proxy=&find_1=&replace_1=&target=http://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=a9h&AN=55642732&authtype=sso&custid=s5834912. Acesso em: 18 jan. 2020.
    • AMA:
      Andrade E, Madruga M, Bobos I, et al. Characterization of Portuguese geomaterials, the clay component of rañas, as potential liners for low and intermediate radioactive disposal sites. Journal of Radioanalytical & Nuclear Chemistry. 2010;286(3):777-783. doi:10.1007/s10967-010-0715-1.
    • APA:
      Andrade, E., Madruga, M., Bobos, I., Paiva, M., Maia, F., Mateus, A., … Gonçalves, M. (2010). Characterization of Portuguese geomaterials, the clay component of rañas, as potential liners for low and intermediate radioactive disposal sites. Journal of Radioanalytical & Nuclear Chemistry, 286(3), 777–783. https://doi.org/10.1007/s10967-010-0715-1
    • Chicago/Turabian: Author-Date:
      Andrade, E., M. Madruga, I. Bobos, M. Paiva, F. Maia, A. Mateus, R. Trindade, M. Freitas, and M. Gonçalves. 2010. “Characterization of Portuguese Geomaterials, the Clay Component of Rañas, as Potential Liners for Low and Intermediate Radioactive Disposal Sites.” Journal of Radioanalytical & Nuclear Chemistry 286 (3): 777–83. doi:10.1007/s10967-010-0715-1.
    • Harvard:
      Andrade, E. et al. (2010) ‘Characterization of Portuguese geomaterials, the clay component of rañas, as potential liners for low and intermediate radioactive disposal sites’, Journal of Radioanalytical & Nuclear Chemistry, 286(3), pp. 777–783. doi: 10.1007/s10967-010-0715-1.
    • Harvard: Australian:
      Andrade, E, Madruga, M, Bobos, I, Paiva, M, Maia, F, Mateus, A, Trindade, R, Freitas, M & Gonçalves, M 2010, ‘Characterization of Portuguese geomaterials, the clay component of rañas, as potential liners for low and intermediate radioactive disposal sites’, Journal of Radioanalytical & Nuclear Chemistry, vol. 286, no. 3, pp. 777–783, viewed 18 January 2020, .
    • MLA:
      Andrade, E., et al. “Characterization of Portuguese Geomaterials, the Clay Component of Rañas, as Potential Liners for Low and Intermediate Radioactive Disposal Sites.” Journal of Radioanalytical & Nuclear Chemistry, vol. 286, no. 3, Dec. 2010, pp. 777–783. EBSCOhost, doi:10.1007/s10967-010-0715-1.
    • Chicago/Turabian: Humanities:
      Andrade, E., M. Madruga, I. Bobos, M. Paiva, F. Maia, A. Mateus, R. Trindade, M. Freitas, and M. Gonçalves. “Characterization of Portuguese Geomaterials, the Clay Component of Rañas, as Potential Liners for Low and Intermediate Radioactive Disposal Sites.” Journal of Radioanalytical & Nuclear Chemistry 286, no. 3 (December 2010): 777–83. doi:10.1007/s10967-010-0715-1.
    • Vancouver/ICMJE:
      Andrade E, Madruga M, Bobos I, Paiva M, Maia F, Mateus A, et al. Characterization of Portuguese geomaterials, the clay component of rañas, as potential liners for low and intermediate radioactive disposal sites. Journal of Radioanalytical & Nuclear Chemistry [Internet]. 2010 Dec [cited 2020 Jan 18];286(3):777–83. Available from: http://widgets.ebscohost.com/prod/customlink/proxify/proxify.php?count=1&encode=0&proxy=&find_1=&replace_1=&target=http://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=a9h&AN=55642732&authtype=sso&custid=s5834912