Table 2 Parameters of pseudo-first-order and pseudo-second-order kinetic models for U adsorption by TW, GOTW and rGO/Fe3O4/TW at different temperature.
Sorbents | Tempetature (K) | Pseudo-first-order model | Pseudo-second-order model | ||||
|---|---|---|---|---|---|---|---|
Qe (mg/g) | k1 (min−1) | R 2 | Qe (mg/g) | k2 (g/(mg·min)) | R 2 | ||
TW | 298 | 1.026 | 0.0002 | 0.7400 | 19.88 | 0.2321 | 1.0000 |
GOTW | 298 | 5.677 | 0.0500 | 0.9796 | 20.00 | 0.3135 | 1.0000 |
rGO/Fe3O4/TW | 298 | 0.104 | 0.0594 | 0.9328 | 19.80 | 0.3985 | 1.0000 |
303 | 0.082 | 0.0530 | 0.9510 | 19.80 | 0.4305 | 1.0000 | |
313 | 0.061 | 0.0290 | 0.9335 | 19.84 | 0.5522 | 1.0000 | |
323 | 0.083 | 0.0364 | 0.5729 | 19.92 | 0.2083 | 0.9999 | |
333 | 0.051 | 0.0244 | 0.8482 | 19.92 | 0.7412 | 1.0000 | |
