Table 2 Concentrations [range (avg ± SD)] of lignin phenols in the Sundarban Sediments

p-Hydroxyl Phenols (P)

94–115 (105 ± 5.94)

99–117 (110 ± 6)

100–114 (107 ± 3.96)

44–75 (60 ± 6.48)

39–53 (45 ± 4.39)

64–73 (68 ± 3.03)

73–85 (78 ± 4.19)

Vanillyl Phenols (V)

64–75 (69 ± 3.45)

65–77 (72 ± 2.83)

75–87 (82 ± 3.59)

28–41 (34 ± 3.15)

21–27 (24 ± 2.03)

39–47 (44 ± 2.34)

50–61 (55 ± 3.45)

Syringyl Phenols (S)

39–47 (43 ± 2.03)

45–52 (48 ± 2.06)

56–63 (59 ± 2.46)

21–33 (27 ± 2.99)

14–19 (17 ± 1.29)

23–30 (27 ± 2.01)

32–47 (38 ± 3.95)

Cinnamyl Phenols (C)

18–24 (22 ± 1.92)

22–27 (24 ± 1.6)

24–33 (29 ± 2.61)

8–16 (13 ± 2.28)

7.3–14.3 (10.52 ± 2.02)

10–17 (14 ± 2.28)

10–21 (16 ± 3.01)

PON/P

0.19–0.3 (0.24 ± 0.03)

0.18–0.24 (0.21 ± 0.02)

0.2–0.23 (0.21 ± 0.008)

0.11–0.29 (0.2 ± 0.04)

0.17–0.26 (0.23 ± 0.03)

0.16–0.23 (0.19 ± 0.02)

0.2–0.27 (0.24 ± 0.02)

P/(V + S)

0.82–0.99 (0.94 ± 0.051)

0.82–0.96 (0.91 ± 0.042)

0.72–0.85 (0.77 ± 0.041)

0.73–1.29 (0.95 ± 0.15)

0.96–1.31 (1.1 ± 0.12)

0.91–1.02 (0.96 ± 0.072)

0.75–0.9 (0.83 ± 0.053)

S/V

0.55–0.67 (0.62 ± 0.034)

0.59–0.71 (0.21 ± 0.016)

0.65–0.76 (0.72 ± 0.04)

0.67–1.04 (0.82 ± 0.1)

0.53–0.82 (0.69 ± 0.07)

0.5–0.68 (0.62 ± 0.051)

0.62–0.78 (0.69 ± 0.041)

C/V

0.25–0.38 (0.32 ± 0.035)

0.28–0.39 (0.34 ± 0.029)

0.29–0.4 (0.35 ± 0.031)

0.25–0.5 (0.38 ± 0.072)

0.27–0.54 (0.43 ± 0.08)

0.24–0.4 (0.31 ± 0.055)

0.18–0.36 (0.29 ± 0.044)

(Ad/Al)_P

0.72–1.35 (0.98 ± 0.18)

1.27–1.57 (1.42 ± 0.085)

0.93–1.48 (1.20 ± 0.15)

1.29–3.83 (2.41 ± 0.69)

1.37–2.75 (1.88 ± 0.34)

1.23–1.7 (1.46 ± 0.13)

1.23–1.68 (1.38 ± 0.11)

(Ad/Al)_V

0.69–1.28 (1.05 ± 0.19)

1.08–1.47 (1.26 ± 0.13)

0.81–1.09 (0.95 ± 0.1)

0.53–1.36 (0.9 ± 0.22)

0.66–1.34 (0.95 ± 0.23)

0.93–1.58 (1.19 ± 0.19)

1.17–1.73 (1.38 ± 0.19)

(Ad/Al)_S

0.42–0.66 (0.53 ± 0.07)

0.41–0.53 (0.48 ± 0.039)

0.59–0.75 (0.67 ± 0.04)

0.38–0.83 (0.56 ± 0.12)

0.49–1.61 (0.99 ± 0.34)

0.52–0.82 (0.67 ± 0.073)

0.56–0.81 (0.65 ± 0.071)

X _lignin (‰)

5.34–6.56 (5.89 ± 0.35)

6.39–7.66 (6.82 ± 0.38)

6.19–7.12 (6.59 ± 0.3)

2.78–6.78 (4.32 ± 1.29)

2.87–4.67 (3.72 ± 0.52)

4.52–5.62 (4.94 ± 0.33)

5.06–6.34 (5.68 ± 0.41)