Agriculture Reference
In-Depth Information
1.0
Tritium
Bentonite clay
0.8
0.6
0.4
0.2
0.0
0
1
2
3
4
5
Pore Volume (V/V
o
)
FIGURE 3.11
Tritium breakthrough results (
C
/
C
o
versus
V
/
V
o
) for a bentonite-sand column (with 1:9 clay:sand
mixture). The solid curve is the fitted breakthrough curve. (From Selim and Amacher, 1997.
With permission.)
Figure 3.14 represents tritium BTCs from two distinctly different soils and
a reference sand material. The soils are Mahan from north Louisiana, which
is predominately kaolinitic, and Webster soil from Iowa, which is of smectitic
type. The reference sand was obtained from Fisher sand.
3.9.1 Numerical Solution of the Nonlinear CDE
The convection-dispersion solute transport Equation (3.24) along with the
retention Equations (3.42 to 3.47) of the nonlinear multireaction approach
can be solved using numerical approximations since closed-form solutions
1.0
Tritium
Kaolinite clay
0.8
0.6
0.4
0.2
0.0
0.0
1.0
2.0
3.0
4.0
V/V
o
FIGURE 3.12
Tritium breakthrough results (
C
/
C
o
versus
V
/
V
o
) for a kaolinite-sand column (1:1 mixture). The
solid curve is the fitted breakthrough curve. (From Selim and Amacher, 1997. With permission.)
Search WWH ::
Custom Search