UCL  IRIS
Institutional Research Information Service
UCL Logo
Please report any queries concerning the funding data grouped in the sections named "Externally Awarded" or "Internally Disbursed" (shown on the profile page) to your Research Finance Administrator. Your can find your Research Finance Administrator at http://www.ucl.ac.uk/finance/research/post_award/post_award_contacts.php by entering your department
Please report any queries concerning the student data shown on the profile page to:

Email: portico-services@ucl.ac.uk

Help Desk: http://www.ucl.ac.uk/ras/portico/helpdesk
Publication Detail
An experimental study of the dissolution rates of Nd-britholite, an apatite-structured actinide-bearing waste storage host analogue
  • Publication Type:
    Journal article
  • Publication Sub Type:
    Journal Article
  • Authors:
    Chaïrat C, Oelkers EH, Schott J, Lartigue JE
  • Publication date:
    01/08/2006
  • Pagination:
    14, 27
  • Journal:
    Journal of Nuclear Materials
  • Volume:
    354
  • Issue:
    1-3
  • Status:
    Published
  • Print ISSN:
    0022-3115
Abstract
The steady-state dissolution rates of Nd-britholite Ca9Nd(PO4)5SiO4F2 have been measured at 25 °C as a function of aqueous solution composition in open-system mixed flow reactors. Measured Nd-britholite dissolution rates based on Ca, P, and F release are found to be close to corresponding apatite dissolution rates; these 25 °C rates decrease from 10-8 to 10-12 mol/m2/s with increasing pH from 3 to 12. Measured Nd release rates are far slower than those of these other elements; Nd concentrations in solution appear to limited by precipitation of a secondary phosphate phase, which limits aqueous Nd concentrations to <10-12 mol/kg at near neutral conditions. Correspondingly, it appears likely that aqueous actinide release from analogous waste hosts will be similarly limited by the precipitation of sparingly soluble phases. © 2006 Elsevier B.V. All rights reserved.
Publication data is maintained in RPS. Visit https://rps.ucl.ac.uk
 More search options
There are no UCL People associated with this publication
University College London - Gower Street - London - WC1E 6BT Tel:+44 (0)20 7679 2000

© UCL 1999–2011

Search by