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| sample name | Na2CO3 solution treatment | HF solution treatment | CO2 treatment |
|---|---|---|---|
| RAC-Y-S | yes | no | no |
| RAC-H-S | yes | yes | no |
| RAC-C-T | yes | yes | yes |
Y refers to the pretreatment method of Na2CO3 solution; S refers to the solution concentration; H refers to the treatment method with HF solution; C refers to the CO2 activation treatment; and T refers to the regeneration temperature.
