THE RADIOCHEMISTRY OF PLUTONIUM - Sciencemadness.org

D. Pu(VI) s Pu(~)
Reagents Solution Temp. Rate Reference
HCOOH HN03 R.T. slow
C20; 0.02 ~ H2C204 75° C
tl/2
= 60 m.in
I- 2.3~EU,
HN03
3.1 ~ ? Rapid
Fe~ HC1 R.T. Rapid
2-6 ~ HN03. 1 ~ R.T. Rapid
Ferrous Sulfmate
2-4 ~’ H2S04 R.T. Fairly fast 361, 39
NO; HN03 ? ? 96
H202 HN03 R.T. Fast, reduction 295
continues to PU(III)
E. Pu(V) +Pu(IV)
Reagents Solution Temp. Rate Reference
HN02 --------------- R.T. slow
NH30H+ 0,5 M HC1, 0.015 ~ R.T. slow
NH3mH+
F. Pu(VI)~ Pu(V)
Reagents Solution Temp. Rate Reference
I- pH 2 R.T. Instantaneous
NH2NHj 0.5 M
NH2XH ?
Cl.. 0.05 ~
25” C
‘1/2
= 180 min
S02 pH -2 25” C Complete in 5 min
Fe+ 0.05 – 2 ~ HC104, 0-25° C --------------------- 301
~=2.
The first of these is the disproportionation of Pu(137) according to the reaction
++ + AH+
3PU+4 + 2H20 = 2Pu ‘3 + PU02
for which the concentration equilibrium constant may be written
~ . (Pu+3)2 (PuO~+) (H+)4
c
(Pu~)3
Table IV-7 lists Kc for this reaction under similar conditions of acidity and ionic
strength for different acids.
13
75