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Table 2 KPE,n and KPE,i values derived from the model fit (Eq. 2) to measured DP values and compared to the log KOW

From: A combined experimental and modeling study to evaluate pH-dependent sorption of polar and non-polar compounds to polyethylene and polystyrene microplastics

Compound

log KOW

KPE,n (L kg−1)

KPE,i (L kg−1)

% variation coefficients of DP

pH 4

pH 7

pH 10

Atrazine

2.61

< 5 × 101

< 5 × 101

49.3

60.1

54.7

Benzotriazole

1.44

< 5 × 101

< 5 × 101

185.3

69.2

38.8

Caffeine

0.07

< 5 × 101

n.a. (no ionic species)

69.4

63.1

157.0

Carbamazepine

2.45

6.7 × 101

< 5 × 101

129.2

59.3

60.6

Carbendazim

1.52

< 5 × 101

< 5 × 101

161.8

54.2

57.3

DEET

2.18

5.2 × 101

n.a.

122.0

44.3

100.8

Diazinon

3.81

1.75 × 103

< 5 × 101

39.0

75.8

14.7

Diclofenac

4.51

1.5 × 102

< 5 × 101

57.9

61.6

133.6

Ibuprofen

3.97

2.6 × 102

1.9 × 102

35.5

59.4

81.0

MCPA

3.25

8.8 × 103

< 5 × 101

74.2

163.3

13,130.3

Mecoprop

3.20

< 5 × 101

< 5 × 101

146.7

522.4

139.9

4-Nonylphenol

5.76

6.0 × 103

7.2 × 102

13.5

13.6

12.4

Phenanthrene

4.46

9.9 × 103

n.a.

8.7

12.4

28.3

Propiconazole

3.72

3.4 × 102

< 5 × 101

45.0

52.0

26.2

TCPP

2.59

2.2 × 102

n.a.

77.5

84.8

24.6

Tebuconazole

3.70

1.4 × 102

< 5 × 101

48.0

75.0

35.4

Terbutryn

3.74

6.2 × 101

6.3 × 101

31.8

53.8

18.1

Torasemide

3.37

1.3 × 102

< 5 × 101

210.6

34.1

34.0

Triclosan

4.76

1.1 × 103

< 5 × 101

27.8

38.2

203.1

  1. K values below 50 L kg−1 are not reported due to too large uncertainties