Table 5.3
Equilibrium partition coefficients (Kd) for pendimethalin
Nominal CT
Kd ± S.D.
Koc
Pesticide
Sediment
Conc
dpm/L
mg/L
Exp. type
L/kg D.W.
L/kg oc
pH
Pendimethalin
Pond
Low
7848222
0.064
Kinetic
615
18647
-
Pendimethalin
Pond
High
16189889
0.132
Kinetic
551
16700
-
Pendimethalin
Pond
Low
7503452
0.061
Kinetic desorp
832
25218
-
Pendimethalin
Pond
High
15517620
0.126
Kinetic desorp
811
24579
-
Pendimethalin
Lillebæk
Low
2952667
0.024
Equilibrium
610 ± 51
21050
7.3
Pendimethalin
Lillebæk
Med
7656389
0.062
Equilibrium
432 ± 14
14914
7.3
Pendimethalin
Lillebæk
High
9757167
0.079
Kinetic
224
7712
-
Pendimethalin
Odderbæk
Low
2952667
0.024
Equilibrium
2074 ± 98.1
20739
7.1
Pendimethalin
Odderbæk
Med
7656389
0.062
Equilibrium
1183 ± 26.8
11831
7.1
Pendimethalin
Odderbæk
High
9757167
0.079
Kinetic
544
5446
-
Pendimethalin
Vaparanta
v. low
845184
0.0056
Kinetic
50.5
9351
-
Pendimethalin
Vaparanta
Low
1380244
0.011
Kinetic
49.2
9108
-
Pendimethalin
Vaparanta
Med
2760489
0.022
Kinetic
44.5
8238
-
Pendimethalin
Vaparanta
High
5520978
0.045
Kinetic
31.5
5840
-
Pendimethalin
Vaparanta
v. high
11041956
0.090
Kinetic
36.7
6788
-
Pendimethalin
Höytiäinen 4°C
10189444
0.083
Equilibrium
379 ± 6.7
11841
5.4
Pendimethalin
Kuorinka 4°C
10189444
0.083
Equilibrium
302 ± 37.5
18436
5.8
Pendimethalin
Mekrijärvi 4°C
10189444
0.083
Equilibrium
2518 ± 6
10371
5.0
Pendimethalin
Vaparanta 4°C
10189444
0.083
Equilibrium
77 ± 0.8
14267
6.2
Pendimethalin
Höytiäinen 20°C
11016389
0.090
Equilibrium
344 ± 18.4
10741
5.8
Pendimethalin
Kuorinka 20°C
11016389
0.090
Equilibrium
306 ± 5.3
18638
6.0
Pendimethalin
Mekrijärvi 20°C
11016389
0.090
Equilibrium
2621 ± 18.1
10795
5.2
Pendimethalin
Vaparanta 20°C
11016389
0.090
Equilibrium
78 ± 3.6
14487
6.4
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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