Table 2.
Adsorption kinetics data as obtained from the applied models
| Adsorbent |
qe [experimental] (mg g−1) |
Pseudo-first order | Pseudo-second order | Intra-particle diffusion model | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
|
qe (mg g−1) |
K1 × 103 (min−1) |
R2 |
qe (mg g−1) |
K2 × 103 (g.mg−1.min−1) |
R2 |
Ki (mg/g.min1/2) |
C (mg g−1) |
R2 | ||
| NiO | 50.000 | 1.166 | 22.167 | 0.863 | 49.986 | 87.567 | 1.000 | 0.977 | 46.306 | 0.970 |
| Ni/NiO(g) | 47.910 | 43.062 | 55.093 | 0.961 | 51.911 | 2.078 | 0.997 | 2.638 | 26.301 | 0.994 |
| Ni/NiO(u) | 49.510 | 26.960 | 44.512 | 0.941 | 51.345 | 3.801 | 0.998 | 4.229 | 13.082 | 0.981 |