Table 2
Adsorption parameters for the Langmuir and Freundlich isotherm models and the thermodynamics parameters for the adsorption of Cd(II) on Fe3O4/PP at different temperatures (pH 7.0, Cd(II) = 2–40 mg/L, adsorbent dose = 0.5 g, contact time = 8 h, temp. = 298 K)
| Temp. (K) | Langmuir | Freundlich |  (KJ/mol) |  (KJ/mol) |  (J/(mol·K)) | |||||
|---|---|---|---|---|---|---|---|---|---|---|
| KL (L/mg) | qm (mg/g) | RL | R2 | KF | 1/n | R2 | ||||
| 288 | 0.083 | 0.914 | 0.375 | 0.970 | 0.134 | 0.486 | 0.959 | 2.35 | 66.59 | 223.29 |
| 298 | 0.121 | 0.951 | 0.255 | 0.971 | 0.156 | 0.469 | 0.805 | −0.11 | ||
| 308 | 0.205 | 1.364 | 0.196 | 0.919 | 0.170 | 0.555 | 0.908 | −2.10 | ||
| Temp. (K) | Langmuir | Freundlich | (KJ/mol) | (KJ/mol) | (J/(mol·K)) | |||||
|---|---|---|---|---|---|---|---|---|---|---|
| KL (L/mg) | qm (mg/g) | RL | R2 | KF | 1/n | R2 | ||||
| 288 | 0.083 | 0.914 | 0.375 | 0.970 | 0.134 | 0.486 | 0.959 | 2.35 | 66.59 | 223.29 |
| 298 | 0.121 | 0.951 | 0.255 | 0.971 | 0.156 | 0.469 | 0.805 | −0.11 | ||
| 308 | 0.205 | 1.364 | 0.196 | 0.919 | 0.170 | 0.555 | 0.908 | −2.10 | ||