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The overall objective of the project was aimed at further elucidating the role of humics in the sorption processes and the potential role in the transport of radionuclides through the geological environment. Humic materials were covalently labelled with radionuclide (eg C-14, I-125) in order to use the labelled material during investigations of their interactions in:

complexation reactions with cations (eg Eu, Sn, Co, Ni) and cation competition reactions (eg with Na, Ca);
sorption of humic and humic complexes on to solid surfaces;
precipitation/dissolution behaviour of humic material.
Radiolabelled humics were used in migration studies using columns of sand eluted with groundwater or synthetic groundwater. The results showed that smaller humic molecules are more mobile than larger humic molecules through the columns and that the presence of humic material in the groundwater facilitated metal transport.

Additional information

Authors: RANDALL A, University of Loughborough (GB);WARWICK P, University of Loughborough (GB);CARLSEN L, National Environmental Research Institute, Roskilde (DK);LASSEN P, National Environmental Research Institute, Roskilde (DK)
Bibliographic Reference: EUR 16865 EN (1996) 220pp., FS, ECU 23.00
Availability: Available from the (2)
ISBN: ISBN 92-827-3913-9
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