Research Article
Thermodynamic Study of Adsorption of Phenol, 4-Chlorophenol, and 4-Nitrophenol on Activated Carbon Obtained from Eucalyptus Seed
Table 2
Langmuir, Freundlich, and Dubinin-Raduskevich-Kaganer models parameter for the adsorption of phenols on ACs at 20°C.
|
Phenols |
ACs |
Langmuir
|
Freundlich
|
Dubinin-Raduskevich-Kaganer | mmol g−1 | L mmol−1 | | ((mmol g−1) (L mmol−1) | 1/ | | mmol g−1 | | |
| Phenol | ACA15 | 0.313 | 0.796 | 0.98 | 1.797 | 0.442 | 0.98 | 0.331 | 19.44 | 0.97 | ACA30 | 0.231 | 0.773 | 0.98 | 1.645 | 0.387 | 0.97 | 0.236 | 17.78 | 0.97 | ACB15 | 0.664 | 2.708 | 0.99 | 6.679 | 0.362 | 0.98 | 0.634 | 22.36 | 0.99 | ACB30 | 2.125 | 10.621 | 0.99 | 67.627 | 0.164 | 0.99 | 1.729 | 26.59 | 0.94 |
| 4-NP | ACA15 | 0.126 | 1.892 | 0.99 | 4.923 | 0.175 | 0.99 | 0.109 | 9.76 | 0.96 | ACA30 | 0.194 | 0.716 | 0.99 | 1.068 | 0.453 | 0.97 | 0.133 | 22.35 | 0.90 | ACB15 | 1.331 | 17.110 | 0.99 | 51.728 | 0.252 | 0.93 | 1.193 | 17.78 | 0.96 | ACB30 | 2.568 | 100.641 | 0.99 | 134.96 | 0.148 | 0.99 | 2.104 | 19.88 | 0.94 |
| 4-CP | ACA15 | 0.598 | 2.116 | 0.98 | 13.290 | 0.244 | 0.99 | 0.439 | 21.14 | 0.90 | ACA30 | 0.648 | 1.422 | 0.98 | 6.980 | 0.367 | 0.99 | 0.585 | 17.78 | 0.95 | ACB15 | 1.944 | 12.860 | 0.98 | 75.339 | 0.198 | 0.90 | 1.869 | 22.44 | 0.93 | ACB30 | 3.888 | 10.288 | 0.99 | 161.09 | 0.171 | 0.94 | 4.273 | 26.59 | 0.92 |
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