Tetravalent uranium mobilization by complexation or oxidation and associated U isotope fractionation

Yvonne Roebbert , Chris Daniel Rosendahl , Ashley Brown , Axel Schippers , Rizlan Bernier-Latmani & Stefan Weyer
Uranium (U) isotopes are suggested to monitor the success of (bio)remediation relying on the reduction of soluble and mobile U(VI) to less soluble U(IV)1. However, the subsurface stability of U(IV), typically present as solid-phase non-crystalline U, may be affected by complexation or oxidation. Understanding these processes and their impact on U isotope fractionation is important to correctly interpret field U isotope signatures. We investigated U mobilization by complexation and oxidation and measured the associated U...
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