Agriculture Reference
In-Depth Information
Tritium
1.0
0.8
Measured
Calculated
RDX
0.6
0.4
0.2
Predicted RDX
0
0
2
4
6
8
10
12
(a) Kolin soil
Tritium
1.0
TNT
0.8
0.6
0.4
0.2
0
0
2
4
6
8
10
12
V/V
o
(b) Kolin soil
FIGURE 5.9
Transport of tritium, RDX, and TNT in Kolin soil. Solid curves are simulations based on the
multireaction model.
based on multireaction model calculations where batch kinetic parameters
were used. For TNT, the use of kinetic batch parameters overestimated
the extent of retardation. Specifically batch parameters overestimated the
extent of retardation, which is probably because the mixing was more com-
plete in batch experiments than in the miscible displacement study. For
several organic contaminants, several authors postulated that experimen-
tal artifacts of batch experiments were responsible for the discrepancy. The
dashed curves are model simulations that provided good description of
RDX and TNT transport results. In obtaining these simulations, only two
phases were considered in the multireaction model, an equilibrium (
S
e
)
phase and an irreversible phase (
S
irr
).
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