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

Table 4

Thermodynamic parameters for the adsorption of Cr(VI) on SCGs.

Temperature (K)	ΔH° (kJ.mol^−1)	ΔS° (J.mol^−1.K^−1)	ΔG° (kJ.mol^−1)	R^2
298	−10.15	−24.64	−2.812	0.986
303			−2.689
313			−2.442
323			−2.196