Reduction and Reoxidation of Soils During and After Uranium Bioremediation; Implications for Long Term Uraninite Stability and Bioremediation Scheme Implementation

Myneni, Peter R Jaffe Satish

Princeton University. Trustees.

关键词: Uraninites;    Biomass;    Sulfates;    Oxygen;    Nitrates;   

DOI  :  10.2172/963722
RP-ID  :  ER63973-1025340-0011052
RP-ID  :  FG02-05ER63973
RP-ID  :  963722

美国|英语

来源: UNT Digital Library

【 摘 要 】

The goal of this research was to study the reoxidation of biologically precipitated U(IV). Several experiments were performed and are summarized below. These experiments include: (1) a long-term (~200 days) U(VI) reduction experiment under low sulfate conditions in order to study in detail changes in iron phases and biomass and determine how they affect/buffer reoxidation; (2) a short term (~70 days) experiment where we tracked the uranium profile via XANES prior to reoxidation and during reoxidation in order to determine the U speciation; (3) a short term experiment where we compare the oxidation of U(IV) by oxygen and nitrate in the absence of FeS; and (4) a short term experiment where we compare the oxidation of U(IV) by oxygen and nitrate in the presence of FeS precipitates.