Table 6 Heat of adsorption from Kinetic-thermodynamic adsorption isotherm on C-steel surface in 8M H3PO4 at various concentrations of QA.
C(mol/L)*10–3 | m-CH3-QA | o-Cl-QA | p-(CH3)2N-QA |
|---|---|---|---|
Qads(kJ/mol) | Qads(kJ/mol) | Qads(kJ/mol) | |
0.332 | − 50.970 | − 40.951 | − 38.561 |
0.549 | − 47.307 | − 42.737 | − 41.354 |
0.763 | − 50.889 | − 48.250 | − 33.838 |
0.973 | − 59.200 | − 52.078 | − 36.144 |
1.18 | − 57.236 | − 55.642 | − 37.619 |
1.38 | − 62.598 | − 60.246 | − 42.942 |
1.58 | − 60.762 | − 57.598 | − 35.762 |
1.78 | − 54.217 | − 52.080 | − 24.668 |
2.07 | − 53.400 | − 44.641 | − 15.088 |
2.54 | − 62.247 | − 50.780 | − 15.855 |
3.00 | − 65.828 | − 48.967 | − 15.261 |
3.43 | − 56.980 | − 55.455 | − 15.628 |
