Table 6 Thermodynamic parameters of MG adsorption activity of nano-bentonite, MgO impregnated clay and raw bentonite
Adsorbent | Temperature (K) | DG (kJ mol−1) | DH (kJ mol−1) | DS (kJ mol−1) | R2 |
|---|---|---|---|---|---|
Nano-bentonite | 298 | 0.00957557 |  − 52.6858 |  − 0.20893 | 0.96 |
| Â | 303 | 0.01062022 | Â | Â | Â |
| Â | 308 | 0.01166487 | Â | Â | Â |
| Â | 323 | 0.01479884 | Â | Â | Â |
| Â | 343 | 0.01897745 | Â | Â | Â |
MgO impregnated clay | 298 | 0.01304932 | 54.62298 | 0.13959 | 0.98 |
303 | 0.01235178 | Â | Â | Â | |
308 | 0.01165423 | Â | Â | Â | |
323 | 0.0095616 | Â | Â | Â | |
343 | 0.00677142 | Â | Â | Â | |
Raw bentonite | 298 |  − 4.5229324 | 25.88 | 15.26 | 0.93 |
303 |  − 4.5992549 |  |  |  | |
308 |  − 4.6755774 |  |  |  | |
323 |  − 4.904545 |  |  |  | |
343 |  − 5.2098351 |  |  |  |