Table 1.

Adsorption thermodynamics parameters.

	T (K)	KC	ΔG (kJ·mol−1)	ΔS (J·mol−1·K−1)	ΔH (kJ·mol−1)	R2
Pb2+	298	133.18	−16.35	−440.12	−147.5	0.146
	308	106.11	−11.94	−440.12	−147.5
	318	122.75	−12.72	−423.85	−147.5
Cu2+	298	35.76	−8.86	−34.84	−19.24	0.449
	308	75.83	−11.08	−26.49	−19.24
	318	59.87	−10.82	−26.49	−19.24
Cd2+	298	1.68	−1.29	−62.67	−19.97	0.996
	308	1.38	−0.82	−62.18	−19.97
	318	1.08	−0.19	−62.18	−19.97