Agriculture Reference
In-Depth Information
1.0
KINETIC
0.8
R1
R2
n
= 0.3
0.6
R2
R1
0.7
1.0
0.4
0.2
0.0
0
1
2
3
4
5
6
Pore Volume (V/V
o
)
FIGURE 9.5
Simulated breakthrough results for a two-layered soil column under different layering orders
(R1 → R2 and R2 → R1). Here R1 is a nonreactive layer and R2 is a reactive layer with kinetic
adsorption, with
n
= 0.3, 0.7, and 1.0, respectively.
orders showed no significant differences in the BTCs. For example, in the
presence of a sink term, the order of soil layers did not influence the shape or
the position of the BTCs as illustrated in Figure 9.6. This finding is consistent
with that of Selim, Davidson, and Rao (1977), where a similar sink term was
implemented.
Nonlinear Kinetics & Irreversible Reaction
1.0
R1 R2
0.8
R2 R1
Sink = 0
0.6
0.4
Sink = θk
s
C
0.2
0.0
0
1
2
3
4
5
Pore Volume (V/V
o
)
FIGURE 9.6
Simulated breakthrough results for a two-layered soil column under different layering orders
(R1 → R2 and R2 → R1). Here R1 is for a nonreactive layer adsorption and R2 is a reactive layer
with
n
th-order and irreversible sink.
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