Table 2 The parameters of Freundlich, Langmuir, Scatchard, and D-R isotherms for adsorption of Cr(VI) by sour cherry kernel shell powder (R-SCKS) and chitosan-coated sour cherry kernel shell powder beads (C-SCKS)
Cr6+ adsorbents | Freundlich isotherm | Langmuir isotherm | Scatchard isotherm | D–R isotherm | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
k | n | R 2 | K b | A s | R 2 | K s | Q s | R 2 | X m | K | E | R 2 | |
R-SCKS | 1.457 | 2.12 | 0.959 | 260.4 | 0.261 | 0.993 | 394.98 | 0.232 | 0.932 | 0.416 | 0.0066 | 8.704 | 0.993 |
C-SCKS | 1.265 | 3.153 | 0.996 | 255.8 | 0.471 | 0.960 | 117.68 | 0.545 | 0.915 | 2.049 | 0.0037 | 11.625 | 0.969 |