Table 1 Physicochemical properties of rice straw and rice straw-derived biochar.

From: Transformations in physicochemical properties and pore structure of biochar derived from rice straw revealed by synchrotron techniques

 

Rice straw

Rice straw-derived biochar

Pyrolysis product yield (%)

–

30.1 ± 0.8

pH (H2O)

6.8 ± 2.0b

8.9 ± 1.5a

Total C (%)

34.7 ± 0.5b

46.9 ± 0.2a

Total N (%)

0.64 ± 0.01a

0.50 ± 0.04b

C: N ratio

54.2 ± 1.1b

93.8 ± 3.4a

Cation exchange capacity (cmol(+) kg− 1)

24.8 ± 1.5b

35.7 ± 2.2a

Water holding capacity (ml g− 1)

5.6 ± 0.3b

7.2 ± 0.3a

Cellulose (%)

48.9 ± 0.1a

30.9 ± 0.1b

Hemicellulose (%)

29.2 ± 0.3a

0.9 ± 0.1b

Lignin (%)

5.4 ± 0.1b

56.3 ± 0.1a

Volatile matter (%)

65.3 ± 0.5a

32.2 ± 0.6b

Fixed C (%)

11.1 ± 0.2b

40.7 ± 0.3a

Ash (%)

19.5 ± 0.3b

25.1 ± 0.3a

Moisture (%)

4.1 ± 0.1a

2.0 ± 0.03b

  1. Results are expressed as mean values ± standard deviation (n = 3). The letters (a and b) indicate significant differences between tested properties on rice straw and its derived Biochar (p < 0.05). Note: some baseline data have been previously reported in our field study21.
Back to article page