Geoscience Reference
In-Depth Information
Table 18.4 Adsorption and desorption of chlorinated benzenes on sediments with different organic matter (OC) concentrations. Reprinted with permission
from Chen et al. (
2000
). Copyright 2000 American Chemical Society
Exp
Sediment (% OC)
Compound
log K
ow
Adsorption
Desorption
e
ð
lg
=
L
Þ
q
0
ð
lg
=
g
Þ
log K
oc
ð
L
=
kg of OC
Þ
q
ir
max
d
ð
lg
=
g
Þ
log K
irr
oc
ð
L
=
kg of OC
Þ
C
max
w
960
a
3.05 ± 0.05
c
1
Dickinson (1.5)
1,2-DCB
3.38
6.37
0.81 ± 0.19
5.44 ± 0.10
442
a
3.42 ± 0.06
c
2
Dickinson (1.5)
1,2,4-TCB
4.00
13.6
1.3 ± 0.29
5.46 ± 0.11
3
Dickinson (1.5)
1,4-DCB
3.38
562
2.78
14.5
1.4 ± 0.55
5.38 ± 0.17
4
Dickinson (1.5)
1,2,3,4-TCB
4.55
688
3.87
15.3
2.0 ± 0.53
5.33 ± 0.10
5
Dickinson (1.5)
HCB
5.50
6.12
4.93
0.450
0.15 ± 0.02
5.31 ± 0.05
6
Lake Charles (4.1)
1,4-DCB
3.38
2,330
2.97
271
6.9 ± 1.1
5.32 ± 0.08
7
Lula (0.27)
1,4-DCB
3.38
116
2.86
0.970
0.92 ± 0.16
5.26 ± 0.08
8
Utica (2.8)
1,4-DCB
3.38
2,660
3.18
202
3.28 ± 0.16
5.81 ± 0.02
a
Concentrations at the end of repetitive adsorptions, calculated from mass balance
b
Measured by solid extraction after continuous adsorption
c
Average values of individual steps in repetitive adsorptions
d
Values fitted with the least-squares method using the irreversible isotherm and experimental adsorption and desorption data
e
C
w
max
, the average concentration observed in the last few desorption steps
