• About
  • Policies
  • What is open access
  • Library
  • Contact
Advanced search
      View Item 
      •   BUIR Home
      • Scholarly Publications
      • Faculty of Science
      • Department of Chemistry
      • View Item
      •   BUIR Home
      • Scholarly Publications
      • Faculty of Science
      • Department of Chemistry
      • View Item
      JavaScript is disabled for your browser. Some features of this site may not work without it.

      Uptake of Ba2+ ions by natural bentonite and CaCO3: a radiotracer, EDXRF and PXRD study

      Thumbnail
      View / Download
      89.9 Kb
      Author(s)
      Shahwan, T.
      Atesin, A. C.
      Erten, H. N.
      Zararsiz, A.
      Date
      2002
      Source Title
      Journal of Radioanalytical and Nuclear Chemistry
      Print ISSN
      0236-5731
      Publisher
      Akademiai Kiado Rt.
      Volume
      254
      Issue
      3
      Pages
      563 - 568
      Language
      English
      Type
      Article
      Item Usage Stats
      193
      views
      174
      downloads
      Abstract
      Ba2+ uptake by natural bentonite, CaCO3 in addition to a number of bentonite-CaCO3 mixtures with variable compositions as a function of pH and Ba2+ concentration was studied. Radiotracer method, EDXRF, and PXRD were used. The results of radiotracer experiments showed that the uptake of Ba2+ by CaCO3 was larger than its uptake by natural bentonite samples, particularly at low initial concentrations of Ba2+ and higher pH values. This finding was supported by the EDXRF results, According to the sorption data, the apparent ΔG° values of sorption were in the range -9±1 to -13±3 kJ/mol. The PXRD studies revealed the formation of BaCO3 upon sorption of Ba2+ on pure CaCO3 and on some of the bentonite-CaCO3 mixtures.
      Keywords
      Barium ion
      Bentonite
      Calcium carbonate
      Tracer
      Adsorption
      Adsorption kinetics
      Chemical composition
      Diffraction
      Hydration
      pH
      Radioactive waste
      Radioactive waste storage
      X ray fluorescence
      X ray powder diffraction
      Permalink
      http://hdl.handle.net/11693/24594
      Published Version (Please cite this version)
      http://dx.doi.org/10.1023/A:1021654524792
      Collections
      • Department of Chemistry 707
      Show full item record

      Browse

      All of BUIRCommunities & CollectionsTitlesAuthorsAdvisorsBy Issue DateKeywordsTypeDepartmentsCoursesThis CollectionTitlesAuthorsAdvisorsBy Issue DateKeywordsTypeDepartmentsCourses

      My Account

      Login

      Statistics

      View Usage StatisticsView Google Analytics Statistics

      Bilkent University

      If you have trouble accessing this page and need to request an alternate format, contact the site administrator. Phone: (312) 290 2976
      © Bilkent University - Library IT

      Contact Us | Send Feedback | Off-Campus Access | Admin | Privacy