Table 5.4
Equilibrium partition coefficients (Kd) for ioxynil and bentazone
Nominal CT
Kd ± S.D.
Koc
Pesticide
Sediment
Conc
dpm/L
mg/L
Exp. type
L/kg D.W.
L/kg oc
pH
Ioxynil
Lillebæk
Low
4090667
0.025
Equilibrium
5.8 ± 0.81
201
7.3
Ioxynil
Lillebæk
Med
33708833
0.210
Kinetic
5.9
202
-
Ioxynil
Lillebæk
High
45705500
0.285
Equilibrium
0.0 ± 0.05
0
7.3
Ioxynil
Odderbæk
Low
4090667
0.025
Equilibrium
19.2 ± 2.27
192
7.0
Ioxynil
Odderbæk
Med
33708833
0.210
Kinetic
19.2
192
-
Ioxynil
Odderbæk
High
45705500
0.285
Equilibrium
7 ± 1.76
67
7.1
Ioxynil
Höytiäinen 4°C
34043611
0.212
Equilibrium
8.8 ± 0.24
276
5.6
Ioxynil
Kuorinka 4°C
34043611
0.212
Equilibrium
4.8 ± 0.38
291
6.0
Ioxynil
Mekrijärvi 4°C
34043611
0.212
Equilibrium
294.6 ± 0.78
1213
5.1
Ioxynil
Vaparanta 4°C
34043611
0.212
Equilibrium
1 ± 0.02
186
6.3
Ioxynil
Höytiäinen 20°C
32752222
0.204
Equilibrium
7.5 ± 0.18
233
5.9
Ioxynil
Kuorinka 20°C
32752222
0.204
Equilibrium
4.7 ± 0.16
289
6.1
Ioxynil
Mekrijärvi 20°C
32752222
0.204
Equilibrium
290.7 ± 0.37
1197
5.3
Ioxynil
Vaparanta 20°C
32752222
0.204
Equilibrium
0.9 ± 0.01
160
6.5
Bentazone
Lillebæk
Low
339667
0.46
Equilibrium
0.5 ± 0.00
18
7.3
Bentazone
Lillebæk
Med
1937333
2.62
Equilibrium
0.5 ± 0.09
17
7.3
Bentazone
Lillebæk
High
20717000
28.02
Equilibrium
0.5 ± 0.15
17
7.3
Bentazone
Odderbæk
Low
339667
0.46
Equilibrium
0.9 ± 0.07
9
7.1
Bentazone
Odderbæk
Med
1937333
2.62
Equilibrium
0.8 ± 0.03
8
7.1
Bentazone
Odderbæk
High
20717000
28.02
Equilibrium
0.7 ± 0.10
7
7.1
Bentazone
Höytiäinen 4°C
2652500
3.588
Equilibrium
0.7 ± 0.01
22
5.7
Bentazone
Kuorinka 4°C
2652500
3.588
Equilibrium
0.5 ± 0.16
33
5.9
Bentazone
Mekrijärvi 4°C
2652500
3.588
Equilibrium
3.9 ± 0.17
16
5.2
Bentazone
Vaparanta 4°C
2652500
3.588
Equilibrium
0.3 ± 0.13
50
6.4
Bentazone
Höytiäinen 20°C
2717861
3.676
Equilibrium
0.7 ± 0.04
21
6.0
Bentazone
Kuorinka 20°C
2717861
3.676
Equilibrium
0.4 ± 0.04
27
6.1
Bentazone
Mekrijärvi 20°C
2717861
3.676
Equilibrium
3.9 ± 0.09
16
5.3
Bentazone
Vaparanta 20°C
2717861
3.676
Equilibrium
0.4 ± 0.12
65
6.9
Kd from kinetic experiments is calculated from fitted sorption and desorption rates while Kd for equilibrium experiments is
an average of Kds calculated for replicates.
Koc values have been calculated as Kd/foc.
pHs given are in the test glasses after equilibration.
Kd fra de kinetiske forsøg er udregnet ud fra fittede sorptions- og desorptionshastigheder, mens Kd for ligevægtsforsøg er
et gennemsnit af Kd værdier udregnet for replikater.
Koc værdier er udregnet som Kd/foc.
pH værdierne er fra testglassene efter ligevægt.
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