Table 3.
Non-linear equations of the four equilibrium isotherms were adopted for sorption of PRO and PMT onto BC-OTPR700 from single solution (sin) and binary mixture (bin)
| Langmuir | qm (mg/g) | KL (L. mole−1) | R2 | |
| PRO(sin) | 640.76 | 0.0018 | 0.9248 | |
| PMT(sin) | 346.95 | 0.0034 | 0.9733 | |
| PRO(bin) | 243.01 | 0.0131 | 0.9665 | |
| PMT(bin) | 216.48 | 0.0082 | 0.9882 | |
| Freundlich | 1/n | KF (mole/g) (L/mole)1/n | R2 | |
| PRO(sin) | 0.96 | 1.016 | 0.9217 | |
| PMT(sin) | 0.89 | 1.469 | 0.9676 | |
| PRO(bin) | 0.80 | 4.282 | 0.9485 | |
| PMT(bin) | 0.73 | 3.447 | 0.9942 | |
| Temkin | bT (J/mole) | AT (L/mole) | R2 | |
| PRO(sin) | 336.35 | 3.503 | 0.4060 | |
| PMT(sin) | 172.63 | 0.513 | 0.6337 | |
| PRO(bin) | 165.01 | 1.287 | 0.6461 | |
| PMT(bin) | 168.19 | 1.019 | 0.8063 | |
| D–R | E (kJ/mole) | qm (mg/g) | R2 | |
| PRO(sin) | 5.06 × 10–7 | 0.99 | 100.39 | 0.9696 |
| PMT(sin) | 2.02 × 10–7 | 1.57 | 84.49 | 0.9685 |
| PRO(bin) | 4.48 × 10–8 | 3.34 | 91.61 | 0.9572 |
| PMT(bin) | 9.26 × 10–8 | 2.32 | 77.63 | 0.8822 |
| Extended-Langmuir | qm (mg/g) | KL(PRO) (L. mole−1) | KL(PMT) (L. mole−1) | R2 |
| PRO(bin) | 360.49 | 8.9621 | 13.296 | 0.9665 |
| PMT(bin) | 185.54 | 3.8992 | 3.3412 | 0.9882 |