Table 2: Langmuir, Freundlich, and Flory-Huggins constants for the uptake of Cr (VI) on the biosorbents.

AdsorbentsLangmuir Freundlich Florry-Huggins
(mg/g) (L/g) (kJ/mol)

PB250.0230.9820.2301.00.8830.0183.4−32.20.969
COPB550.0470.988101.30.9120.1394.0−31.80.978
SOPB41.70.6600.9906.33.50.8870.1032.4−31.70.982