Study on Adsorption of Cu and Ba from Aqueous Solutions Using Nanoparticles of Origanum (OR) and Lavandula (LV)

Table 3

Thermodynamic parameters for the metal ion adsorption onto OR and LV.

Parameter	Adsorbent (OR)		Adsorbent (LV)
	Cu	Ba	Cu	Ba
∆H° (J/mol)	1867.07	9096.35	3748.28	10161.4
∆S° (J/mol K)	14.52	33.14	17.16	45.89
∆G° (kJ/mol) at 298K	–2.46	–0.78	–1.36	–3.51
∆G° (kJ/mol) at 333K	–2.97	–1.94	–1.96	–5.12
R^2	0.966	0.964	0.968	0.957