Table 1 Adsorption kinetic parameters for Co(II) and Eu(III) adsorption onto the BWO nanocrystals.
Kinetic models | Parameters | Co60 | Eu152+154 | ||||
|---|---|---|---|---|---|---|---|
25 °C | 40 °C | 60 °C | 25 °C | 40 °C | 60 °C | ||
qe (exp.)(mgg-1) | 58.8 | 63.3 | 67.7 | 81.9 | 86.3 | 90.5 | |
Pseudo-first order equation | qe (Cal.) (mgg-1) | 5.28 | 5.31 | 5.11 | 5.38 | 5.53 | 5.39 |
K1(min-1) | 0.014 | 0.014 | 0.016 | 0.018 | 0.014 | 0.016 | |
R2 | 0.921 | 0.915 | 0.921 | 0.918 | 0.900 | 0.914 | |
Pseudo-second order equation | qe (Cal.) (mgg-1) | 61.4 | 66.9 | 70.9 | 87.9 | 90.5 | 93.4 |
K2 (min-1) | 0.001 | 0.001 | 0.001 | 0.001 | 0.001 | 0.001 | |
R2 | 0.979 | 0.984 | 0.987 | 0.990 | 0.992 | 0.993 | |
Intra-particle diffusion | Kp (mgg-1 min-1/2) | 5.27 | 5.24 | 5.26 | 6.32 | 6.28 | 6.39 |
C | 10.37 | 15.23 | 19.28 | 24.4 | 29.3 | 32.44 | |
R2 | 0.928 | 0.929 | 0.937 | 0.937 | 0.947 | 0.955 | |
Elovich model | β (mg g-1 min-1) | 0.087 | 0.086 | 0.085 | 0.073 | 0.071 | 0.069 |
α (g mg-1) | 18.19 | 27.91 | 39.58 | 48.7 | 67.1 | 81.04 | |
R2 | 0.919 | 0.917 | 0.927 | 0.939 | 0.905 | 0.909 | |
