Table 5.
Langmuir and Freundlich parameters for the adsorption of phenol over as-prepared porous carbon materials under the optimized conditions of phenol dose of 100 mg L−1, temperature of 25 °C, and pH of 4.
| Sample | Langmuir model | Freundlich model | ||||
|---|---|---|---|---|---|---|
| Qmax | KL | R2 | KF | 1/n | R2 | |
| BU_AC_H2O_900 | 248.14 | 0.029 | 0.99 | 0.405 | 27.68 | 0.98 |
| BU_AC_k2CO3_700 | 185.19 | 0.028 | 0.98 | 0.368 | 23.58 | 0.99 |
| BU_AC_KOH_700 | 206.61 | 0.024 | 0.96 | 0.445 | 18.25 | 0.91 |
| BS_AC_H2O_900 | 180.50 | 0.101 | 0.99 | 0.198 | 65.07 | 0.94 |
| BS_AC_k2CO3_700 | 184.84 | 0.034 | 0.98 | 0.257 | 42.09 | 0.98 |
| BS_AC_KOH_700 | 149.48 | 0.001 | 0.95 | 0.514 | 6.32 | 0.98 |
| SD_AC_H2O_900 | 290.69 | 0.029 | 0.99 | 0.351 | 42.54 | 0.99 |
| SD_AC_k2CO3_700 | 215.52 | 0.019 | 0.93 | 0.406 | 20.37 | 0.99 |
| SD_AC_KOH_700 | 146.20 | 0.036 | 0.96 | 0.226 | 38.17 | 0.83 |