Table 2.
Elemental analysis (C, H, N, O, and atomic ratios H/C, N/C, and O/C) of the biochar samples.
| SampleŦ | C, H, N and atomic ratios H/C, N/C and O/C | ||||||
|---|---|---|---|---|---|---|---|
| %C | %H | %N | %O | H/C | N/C | O/C | |
| CR | 52 ± 0 | 3 ± 0 | 2 ± 0 | 43 ± 0 | 1 | 0 | 1 |
| CS | 59 ± 0 | 5 ± 0 | 1 ± 0 | 35 ± 0 | 1 | 0 | 0 |
| OP | 58 ± 1 | 5 ± 0 | 2 ± 0 | 35 ± 1 | 1 | 0 | 0 |
| PO | 60 ± 1 | 5 ± 0 | 1 ± 0 | 35 ± 1 | 1 | 0 | 0 |
| SB | 59 ± 1 | 4 ± 0 | 1 ± 0 | 37 ± 1 | 1 | 0 | 0 |
| WH | 45 ± 1 | 5 ± 0 | 4 ± 1 | 47 ± 0 | 1 | 0 | 1 |
ŦCR = charcoal fines; CS = coconut shell; OP = orange peel; PO = palm oil bunch; SB = sugarcane bagasse; WH = water hyacinth.