Table 4 Non-linear kinetic models and parameters for adsorption of Cr (VI) and Cur.
Kinetic model | Pseudo-first order | Pseudo-second order | Intraparticle diffusion | Elvoich | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Plot | Qt vs. time (t) | Qt vs. time (t) | Qt vs. time (t) | Qt vs. time (t) | |||||||||
Constant | qe (exp) | K1 | qe (calc) | R2 | K2 | qe (calc) | R2 | Kdiff | C | R2 | α | R2 | |
Units | mg g− 1 | min− 1 | mg g− 1 | - | mg g− 1 min− 1 | mg g− 1 | - | mg g− 1 min− 1/2 | mg g− 1 | - | - | mg g− 1 min− 1 | - |
Cr(VI) | 19.55 | 0.339 | 19.31 | 0.999 | 0.030 | 20.40 | 0.950 | 1.17 | 12.35 | 0.671 | 0.409 | 206.29 | 0.902 |
Cur | 19.84 | 0.619 | 19.56 | 0.998 | 0.063 | 20.21 | 0.934 | 0.788 | 14.97 | 0.539 | 0.724 | 60819.74 | 0.828 |
