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The specific surface areas of biochars at different treatments.
| Sample | Thermotreatment temperature (°C) | Chemical activation | Specific surface area (m2/g) |
|---|---|---|---|
| Biochar-550 | 550 | No | 105.1 |
| Biochar-act550 | 550 | Yes | 116.6 |
| Biochar-900 | 900 | No | 144.3 |
| Biochar-act900 | 900 | Yes | 172.3 |
