Research Article
Adsorption of Pb(II) from Water onto ZnO, TiO2, and Al2O3: Process Study, Adsorption Behaviour, and Thermodynamics
Table 4
Thermodynamic parameters for the adsorption of Pb(II) onto all adsorbents.
| | (°C) | (K) | Adsorbent | | (kJ/mol) | (kJ/mol) | (kJ/mol/K) |
| | 18 | 291 | ZnO | 3.869 | -72.509 | 69.196 | 249.409 | | 29 | 302 | 12.549 | -75.252 | 69.196 | 249.409 | | 41 | 314 | 31.449 | -78.245 | 69.196 | 249.409 |
| | 18 | 291 | TiO2 | 3.489 | -47.764 | 44.957 | 164.292 | | 29 | 302 | 5.558 | -49.571 | 44.957 | 164.292 | | 41 | 314 | 13.596 | -51.543 | 44.957 | 164.292 |
| | 18 | 291 | Al2O3 | 1.186 | -30.435 | 30.020 | 104.689 | | 29 | 302 | 1.939 | -31.586 | 30.020 | 104.689 | | 41 | 314 | 2.943 | -32.842 | 30.020 | 104.689 |
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