Table 1 Key chemical properties/parameters of the sediments.

TOC (g/kg)

32

21

53

N (g/kg)

3

2

3

S (g/kg)

<2

<2

<2

d.w. (%)

42.2

38.3

40.3

F1 (> 2000 μm)

1.0

2.0

1.0

F2 (630–2000 μm)

2.0

2.0

2.0

F3 (200–630 μm)

3.0

50.0

11.0

F4 (63–200 μm)

11.0

13.0

8.0

F5 (20–63 μm)

13.0

6.0

27.0

F6 (< 20 μm)

71.0

27.0

52.0

TPH (mg/kg)

170

110

270

Σ 16 EPA PAH (mg/kg)

1.34

3.06

6.10

Σ 7 PCB (μg/kg)

19.2

28.0

44.7

α-HCH (μg/kg)

0.09

0.10

430

β-HCH (μg/kg)

0.12

0.94

230

γ-HCH (μg/kg)

0.61

0.32

56

p, p' -DDT (μg/kg)

0.17

0.81

56

p, p' -DDD (μg/kg)

0.76

1.10

110

p, p' -DDE (μg/kg)

1.50

2.00

33

HCB (μg/kg)

1.60

10

56

OCS (μg/kg)

0.11

0.33

6.30

TBT (μg Sn/kg)

4.0

< 2.0

11.3

As (mg/kg)

10.4

18.6

41.3

Pb (mg/kg)

29.9

89.6

144.0

Cd (mg/kg)

0.64

1.26

6.9

Cr (mg/kg)

56.5

91.5

102.0

Cu (mg/kg)

51.2

70.2

136.0

Ni (mg/kg)

36.1

61.5

65.4

Hg (mg/kg)

0.48

0.5

1.5

Zn (mg/kg)

270

490

1060