Research Article
Removal of Zn (II) and Cu (II) Ions from Industrial Wastewaters Using Magnetic Biochar Derived from Water Hyacinth
Table 3
Thermodynamic parameters derived from Vant Hoff’s plots.
| | | | (kJ/mol) | (kJ/mol/K) | (kJ/mol) | | Temperature (K) | 298.15
| 303.15
| 308.15
| 313.15
| 318.15
| 323.15
| | Adsorbent | Adsorbate |
| | EC | Cu2+ | -9.571 | -8.044 | -6.517 | -4.991 | -3.464 | -1.937 | -0.305 | -100.608 | | Zn2+ | -9.317 | -7.604 | -5.891 | -4.177 | -2.464 | -0.751 | -0.343 | -111.474 |
| | Fe2O3-EC | Cu2+ | -6.370 | -8.018 | -9.667 | -11.315 | -12.964 | -14.612 | -0.330 | -91.928 | | Zn2+ | -8.896 | -8.569 | -8.243 | -7.916 | -7.589 | -7.262 | -0.065 | -28.392 |
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