Research Article
Thermodynamic Study of Adsorption of Phenol, 4-Chlorophenol, and 4-Nitrophenol on Activated Carbon Obtained from Eucalyptus Seed
Table 3
Thermodynamic parameters for the adsorption of phenols on ACs.
| Phenols | ACs | 20°C (kJ mol−1) | 30°C (kJ mol−1) | 40°C (kJ mol−1) | (kJ mol−1) | (J mol−1) |
| Phenol | CAA15 | 0.82 | 0.81 | 0.79 | 7.22 | 2.83 | CAA30 | 0.68 | 0.55 | 0.17 | 1.42 | −22.26 | CAB15 | 2.43 | 1.51 | 1.81 | 21,31 | 17.4 | CAB30 | 5.76 | 3.95 | 4.81 | 26.09 | 70.5 |
| 4-NPl | CAA15 | 1.55 | 1.95 | 1.75 | 4.52 | −10.23 | CAA30 | 0.81 | 1.22 | 0.63 | 1.35 | −11.91 | CAB15 | 2.68 | 4.91 | 4.04 | 17.82 | −71.58 | CAB30 | 5.62 | 3.67 | 4.19 | 25.96 | −32.08 |
| 4-CP | CAA15 | 1.83 | 1.79 | 2.35 | 5.74 | −25.52 | CAA30 | 1.64 | 1.94 | 0.96 | 0.95 | −7.22 | CAB15 | 2.93 | 4.23 | 4.37 | 18.32 | −73.11 | CAB30 | 5.68 | 3.53 | 3.79 | 30.8 | 97.27 |
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