Influence of Humic Acids on the Migration of Uranium (IV)/(VI) in Quartz Sand

Mibus, Jens; Sachs, Susanne; Nebelung, Cordula; Bernhard, Gert

Influence of Humic Acids on the Migration of Uranium (IV)/(VI) in Quartz Sand

Mibus, J.; Sachs, S.; Nebelung, C.; Bernhard, G.

This study investigates the migration behavior of U(IV) and U(VI) in the system humic acid / uranium / quartz sand by means of column experiments. Humic acid exhibits a significant influence on the transport of U(IV) and U(VI). In case of U(VI) a clear mobilizing effect was observed. There are strong indications for a similar influence of humic acid on U(IV) transport. Both redox species of uranium differ slightly in their migration behavior in presence of humic acid. This is mainly reflected in a disagreement of their total recoveries. The observed difference amounts to approximately 25 %.

Keywords: Actinides; Uranium; U(IV); U(VI); Humic Acids; Quartz Sand; Migration; Sorption; Column Experiments; Reducing Conditions

Lecture (Conference)
11th International Symposium on Water Rock Interaction WRI-11, 27.06.-02.07.2004, Saratoga Springs, NY, United States
Contribution to proceedings
11th International Symposium on Water-Rock Interaction WRI-11, 27.06.-02.07.2004, Saratoga Springs , NY, United States
Proceedings, 691-695

Permalink: https://www.hzdr.de/publications/Publ-5852
Publ.-Id: 5852