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Title: Design of Mixed Batch Reactor and Column Studies at Oak Ridge National Laboratory

We (the Stanford research team) were invited as external collaborators to contribute expertise in environmental engineering and field research at the ORNL IFRC, Oak Ridge, TN, for projects carried out at the Argonne National Laboratory and funded by US DOE. Specifically, we assisted in the design of batch and column reactors using ORNL IFRC materials to ensure the experiments were relevant to field conditions. During the funded research period, we characterized ORNL IFRC groundwater and sediments in batch microcosm and column experiments conducted at ANL, and we communicated with ANL team members through email and conference calls and face-to-face meetings at the annual ERSP PI meeting and national meetings. Microcosm test results demonstrated that U(VI) in sediments was reduced to U(IV) when amended with ethanol. The reduced products were not uraninite but unknown U(IV) complexes associated with Fe. Fe(III) in solid phase was only partially reduced. Due to budget reductions at ANL, Stanford contributions ended in 2011.
Authors:
 [1] ;  [1]
  1. Stanford Univ., CA (United States)
Publication Date:
OSTI Identifier:
1226006
Report Number(s):
DR--SC0006783
TRN: US1600017
DOE Contract Number:
SC0006783
Resource Type:
Technical Report
Research Org:
Stanford Univ., CA (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; ORNL; ETHANOL; GROUND WATER; EXPERIMENT DESIGN; ENVIRONMENTAL ENGINEERING; MICROCOSMS; SEDIMENTS; URANIUM; REDUCTION; BIOGEOCHEMISTRY; CHEMICAL COMPOSITION; SULFATES iron; bioreduction; reoxidation; column; synchronal analysis