Impact of humic substances on the geochemical behaviour of radionuclides

Pascal E. Reiller (1) , Gunnar Buckau (2)

1 LANIE - Laboratoire de développement Analytique Nucléaire Isotopique et Elémentaire
2 KIT - Karlsruhe Institute of Technology

In an environment rich in natural organic matter (NOM) it is expected to play an important role on the speciation and migration of actinides. The inherent heterogeneity of these substances makes the modelling of their interaction with metals and surfaces, and thus of their migration, particularly difficult. This chapter recalls the basics of the interaction of NOM with actinides, and of their comportment in presence of mineral surfaces. Finally, illustrative examples of NOM influence on the migration of actinides in the environments are presented.

Keywords: complexation; adsorption; substances humiques; matière organique naturelle

Domains: Sciences of the Universe [physics]; Earth Sciences; Geochemistry; Environmental Sciences; Global Changes

Pascal E. Reiller, Gunnar Buckau. Impact of humic substances on the geochemical behaviour of radionuclides. Horst Geckeis, Christophe Poinssot. Radionuclide Behaviour in the Natural Environment: Science, Implications and Lessons for the Nuclear Industry, Woodhead Publishing, pp.103-160, 2012, Woodhead Publishing Series in Energy, 0 85709 132 8. ⟨cea-00789545⟩