TABLE 1.
The results of elemental analysis and main structural parameters of unmodified biochar and modified biochar.
| Sample | Elemental composition analysis (wt%) | Atomic ratio | BET surface area (m2/g) | Average pore diameter (nm) | Pore volume (cm³/g) | |||||
|---|---|---|---|---|---|---|---|---|---|---|
| C [%] | H [%] | N [%] | O [%] | H/C | O/C | (O + N)/C | ||||
| PMB | 75.31 | 2.98 | 1.69 | 14.15 | 0.04 | 0.19 | 0.21 | 2.35 | 7.68 | 0 |
| PMBN1 | 72.27 | 3.10 | 3.34 | 21.54 | 0.04 | 0.30 | 0.34 | 379.31 | 2.29 | 0.22 |
| PMBN2 | 70.42 | 3.27 | 2.63 | 27.19 | 0.05 | 0.39 | 0.42 | 762.16 | 2.17 | 0.41 |
| PMBN3 | 62.05 | 3.40 | 2.65 | 32.35 | 0.06 | 0.52 | 0.56 | 1819.22 | 2.17 | 1.02 |
| PMBN4 | 64.49 | 3.63 | 2.38 | 32.92 | 0.06 | 0.51 | 0.55 | 1911.44 | 2.21 | 1.06 |
| PMBN5 | 66.14 | 3.72 | 2.68 | 41.30 | 0.06 | 0.62 | 0.66 | 1823.02 | 2.25 | 0.99 |