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b
= 0.25
0.5
0.75
1.0
1.0
0.8
0.6
0.4
0.2
0
0
1
2
3
4
5
6
7
8
9
V/V
o
FIGURE 3.16
Breakthrough curves for several values of
b
< 1. (From Selim and Amacher, 1997. With
permission.)
equilibrium Freundlich-type sorption. For the nonreactive case (
K
f
= 0),
which indicates no solute retardation, the sorption (or effluent) side and the
desorption side of the BTC appear symmetric. Here the solute concentration
(
C
/
C
o
) slightly exceeds 0.5 for
V
/
V
o
of 1. As the Freundlich distribution coef-
ficient
K
f
increased, the solute became more retarded as is clearly illustrated
by the location of the sorption side of the BTCs. For example, for the case
b
= 1
1.25
1.5
2
1.2
1.0
0.8
0.6
0.4
0.2
0
0
2
4
6
8
10
12
V/V
o
14
16
18
20
22
24
FIGURE 3.17
Breakthrough curves for several Freundlich values of
b
> 1. (From Selim and Amacher, 1997.
With permission.)
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