Assessment of Untreated Coffee Wastes for the Removal of Chromium (VI) from Aqueous Medium

Table 2

Isotherm constants for Cr(VI) adsorption on SCGs at 25°C.

Isotherm	Parameters
Langmuir
qm (mg/g)	42.9
KL (L/mg)	0.356
RL	0.014
R^2	0.998
χ^2	2.028
Freundlich
KF (mg/g) (L/mg)^1/n	14.4
N	0.258
R^2	0.783
χ^2	45.11
Temkin
A (L/g)	2.5
B	8.531
R^2	0.882
χ^2	24.29