Samples JPB month (M)

C (%)

H (%)

N (%)

S (%)

O (%)

Fe (%)

H/C

O/C

BET surface area (m²/g)

0

^*28.79 ± 0.25

4.30 ± 0.19

1.68 ± 0.02

0.29 ± 0.10

37.42 ± 2.10

0.19 ± 0.001

0.15 ± 0.02

1.30 ± 0.51

1.09 ± 0.47

4

30.35 ± 0.46

4.11 ± 0.26

2.33 ± 0.07

0.11 ± 0.08

37.16 ± 3.84

0.93 ± 0.006

0.14 ± 0.03

1.22 ± 0.64

1.24 ± 0.35

8

29.99 ± 0.34

3.65 ± 0.21

2.19 ± 0.08

0.08 ± 0.01

30.11 ± 5.30

1.05 ± 0.009

0.12 ± 0.01

1.00 ± 0.47

47.87 ± 2.46

12

25.62 ± 0.26

2.89 ± 0.33

2.08 ± 0.10

0.10 ± 0.04

27.30 ± 3.18

1.22 ± 0.01

0.11 ± 0.01

1.07 ± 0.43

9.60 ± 0.94

16

33.98 ± 0.86

3.55 ± 0.18

2.79 ± 0.11

0.02 ± 0.008

30.50 ± 4.89

1.14 ± 0.01

0.10 ± 0.01

0.90 ± 0.11

11.04 ± 0.10