Sample | AlOH | –OCH3 | ArOH | COOH | CH2 of trioxane |
---|---|---|---|---|---|
Untreated lignin | 2.16 | 1.87 | 0.05 | 0 | 1.00 |
MA-pretreated lignin | 2.55 | 1.59 | 0.08 | 0.08 | 1.00 |
MA + AlCl3 pretreated lignin | 2.94 | 1.17 | 0.15 | 0.12 | 1.00 |
MA + FeCl3 pretreated lignin | 2.70 | 1.42 | 0.11 | 0.09 | 1.00 |
MA + Al(NO3)3 pretreated lignin | 2.83 | 1.31 | 0.12 | 0.09 | 1.00 |
MA + Fe(NO3)3 pretreated lignin | 2.87 | 1.25 | 0.13 | 0.11 | 1.00 |