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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)

From: Chitosan-coated sour cherry kernel shell beads: an adsorbent for removal of Cr(VI) from acidic solutions

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