Abstract
Redox properties of different humic acids (HA) were determined and the stability of the oxidation state of U(VI) in presence of humic acid was studied. Applying laser-induced photoacoustic spectroscopy a qualitative spectroscopic proof for the reduction of U(VI) to U(IV) by humic acid was obtained. By column experiments it was found that humic acid influences the transport of both, U(IV) and U(VI). In presence of humic acid both redox species migrate nearly as fast as the groundwater flow. In case of U(VI) humic acid exhibits a clear mobilizing effect. There are strong indications for a similar impact on the U(IV) migration.
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Sachs, S., Geipel, G., Mibus, J., Bernhard, G. (2006). Impact of humic acid on the uranium migration in the environment. In: Merkel, B.J., Hasche-Berger, A. (eds) Uranium in the Environment. Springer, Berlin, Heidelberg. https://doi.org/10.1007/3-540-28367-6_10
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DOI: https://doi.org/10.1007/3-540-28367-6_10
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