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| pH of the 1 : 10 suspension in water | ||
|---|---|---|
| Before MA | After MA | |
| Brown coal without additives | 5.4 | 5.4 |
| Brown coal + Na2CO3 | 10.5 | 7.0 |
| Brown coal + NaOH | 11.7 | 8.7 |
| Brown coal + 2Na2CO3·3H2O2 | 10.4 | 7.3 |
