| Fluoride ion concentration (mg/L) |
25 |
50 |
75 |
| qe,exp(mg/g) |
23.50 |
45.31 |
66.12 |
| Pseudo-first-order model |
| qe(mg/g) |
20.73 |
25.85 |
36.71 |
| k1(min-1) |
0.0291 |
0.0301 |
0.0302 |
| R2 |
0.9826 |
0.9801 |
0.9828 |
| Pseudo-second-order model |
| qe(mg/g) |
23.92 |
45.45 |
66.22 |
| k2(g.mg-1.min-1) |
0.0039 |
0.0019 |
0.0014 |
| R2 |
0.9967 |
0.9957 |
0.9981 |
| Intra-particle diffusion model |
| ki(mg.g-1.min-1) |
4.8227 |
9.4463 |
13.871 |
| C |
3.7547 |
6.8723 |
9.3529 |
| R2 |
0.9843 |
0.9850 |
0.9841 |
|
