| Adsorbents |
Methylene Blue
concentration (mg/L) |
ΔH° (kJ/mol) |
ΔS° (kJ/mol) |
ΔG° (kJ/mol) |
| 298K |
308K |
318K |
| OPC |
500 |
111.548 |
0.438 |
-19.107 |
-23.491 |
-27.875 |
| OSC |
500 |
33.512 |
0.175 |
-18.719 |
-20.473 |
-22.225 |
| PC |
200 |
58.519 |
0.277 |
-23.998 |
-26.767 |
-29.536 |
| SC |
100 |
23.909 |
0.132 |
-15.595 |
-16.921 |
-18.246 |
|
| Table 5: Thermodynamic parameters for adsorption of MB by SC, PC, OSC and
OPS at different temperatures. |
|
