Aqueous Complexation Reactions Governing the Rate and Extent of Biogeochemical U(VI) Reduction Slide: 2 of 23
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S. putrefaciens CN32 + Lactate
50
40-
30
20-
10-
0" No Ca
1 0.45 mM Ca (83.8% Ca-U02-CO3)
0 2.5 mM Ca (98.2%)1I
- - ~ -I \
- 450
100
150
200
25C
time (h)
The effect of Ca did not
depend on:
" Bacterial strain:
- S. algae BrY
- S. putrefaciens SN32
- Desulfovibrio desulfuricans
- Geobacter sulfurreducens
- G. metallireducens GS-15
" Antecedent culture conditions:
aerobic, anaerobic.
" Electron donor: Lactate, Acetate,
H2.
The effect of Ca did depend on:0.2 -.
0.1- II h
-0.1
0 2 4 6 8 10 12
k (A' )
OAK RIDGE NATIONAL LABORATORY
U. S. DEPARTMENT OF ENERGY0.20
(b) .
no - yb C
Ca
o 1 3 3 4 5 B
R (A)Electron acceptor:
/ U(VI)
x Tc(VII)
x Fumarate
x Co(III)EDTA
(Brooks et al., 2003)UT-BATTELLE
2..-- - -IL
4
0
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Brooks, Scott C.; Dong, Wenming; Carroll, Sue; Fredrickson, James K.; Kemner, Kenneth M. & Kelly, Shelly. Aqueous Complexation Reactions Governing the Rate and Extent of Biogeochemical U(VI) Reduction, presentation, April 5, 2006; Oak Ridge, Tennessee. (https://digital.library.unt.edu/ark:/67531/metadc885875/m1/2/: accessed March 29, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.