Behaviour of uranium in iron-bearing permeable reactive barriers: investigation with super(237)U as a radioindicator

This study was undertaken to investigate the long-term performance of elemental iron as reactive material for the removal of uranium in passive groundwater remediation systems. By using super(237)U as a radioindicator it was possible to track the movement of the contamination front through a test co...

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Bibliographic Details
Published in:The Science of the total environment 2003-05, Vol.307 (1-3), p.231-238
Main Authors: Simon, F-G, Segebade, C, Hedrich, M
Format: Article
Language:English
Online Access:Get full text
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Summary:This study was undertaken to investigate the long-term performance of elemental iron as reactive material for the removal of uranium in passive groundwater remediation systems. By using super(237)U as a radioindicator it was possible to track the movement of the contamination front through a test column without taking samples or dismantling the apparatus. The stoichiometric ratio between uranium and iron was found to be 1:(1390+/-62). The reaction between iron and uranium is of pseudo first-order kinetics and the rate constant was measured to be (1.1+/-0.09)x10 super(-3) s super(-1). These data enable the calculation of ideal lifetime for permeable reactive barriers (PRB) using iron for uranium removal neglecting hydrological factors that may impair the function of PRBs.
ISSN:0048-9697
DOI:10.1016/S0048-9697(02)00548-X