|
| Carboxyle (mol/g) | Lactonic (mol/g) | Phenolic hydroxyl group (mol/g) |
| HNO3-TAC | 5.732 × 10−4 | 3.264 × 10−4 | 1.716 × 10−4 |
| HCl-TAC | 2.937 × 10−4 | 1.992 × 10−4 | 8.143 × 10−5 |
| NaOH-TAC | 7.237 × 10−5 | 9.027 × 10−5 | 2.719 × 10−5 |
| AC | 2.058 × 10−4 | 1.773 × 10−4 | 5.638 × 10−5 |