@article{gledocs_11858_6682, author = {Noubactep, C. and Schöner, A. and Dienemann, H. and Sauter, M.}, title = {Investigating the Release of Co-precipitated Uranium from Iron Oxides}, year = {2006}, volume = {267}, number = {1}, pages = {21-27}, abstract = {The removal of uranium (VI) in zerovalent iron permeable reactive barriers and wetlands can be explained by its association with iron oxides. The long term stability of this immobilized U is yet to be addressed. The presented study investigates the remobilization of U(VI) from iron oxides via diverse reaction pathways (acidification, reduction, complex formation) in the laboratory. Prior uranium co-precipitation experiments were conducted under various conditions. The addition of various amounts of a pH-shifting agent (pyrite), an iron complexing agent (EDTA) or an iron (III) reduction agent (TiCl3) yielded in uranium remobilisation to concentrations above the US EPA maximum allowed contaminant level (MCL = 30 mg/L). This study demonstrates that U(VI) release in nature will strongly depend on the conditions and the mechanism of its fixation by geological materials.}, note = { \url {http://resolver.sub.uni-goettingen.de/purl?gldocs-11858/6682}}, }