Studies on the Removal of Cadmium Toxic Metal Ions by Natural Clays from Aqueous Solution by Adsorption Process

Table 4

Thermodynamic parameters for the adsorption of Cd (II) ions.

	Temperature (K)	ΔS° (kJ/mol/K)	ΔH° (kJ/mol)	ΔG° (kJ/mol)
QC-MC	298	−0.1349	−41.247	−1.0468
	303			−0.3723
	308			0.3022
	313			0.9767
	318			1.6512
	323			2.3257
QC-MT	298	−0.1772	−56.759	−3.9534
	303			−3.0674
	308			−2.1814
	313			−1.2954
	318			−0.4094
	323			−0.4766