Table 3.

Thermodynamic parameters of SDT-A for Cd(II) adsorption on IB.

C0 (mmol·L−1)	ΔHT (kJ·mol−1)			ΔST (J·mol−1·K−1)			ΔGT (kJ·mol−1)
	298.15	303.15	308.15	298.15	303.15	308.15	298.15	303.15	308.15
0.02	21.05	21.70	22.68	142.83	146.21	150.29	−21.53	−22.54	−23.64
0.04	17.42	18.15	18.95	126.11	129.48	133.16	−21.19	−22.22	−22.08
0.06	15.20	15.78	16.35	115.93	118.56	121.18	−19.36	−19.94	−20.76
0.08	13.00	13.48	13.89	105.78	108.00	109.90	−18.54	−19.26	−19.97
0.10	11.69	12.00	12.25	99.78	101.19	102.35	−18.06	−18.68	−19.29

ΔH_A = 17.03 kJ·mol⁻¹, ΔS_A = 124.33 J·mol⁻¹·K⁻¹, ΔG_A = −20.04 kJ·mol⁻¹ (298.15 K), −20.66 kJ·mol⁻¹ (303.15 K), −21.28 kJ·mol⁻¹ (308.15 K).