Green Synthesis of Nanostructure CeO₂ Using Tea Extract: Characterization and Adsorption of Dye from Aqueous Phase

Table 5

Adsorption parameters obtained from the Langmuir, Freundlich, D-R, and Temkin isotherm models.

		873K–CeO2	Comm-CeO2
Langmuir	KL (L/mg)	0.03	0.17
	RL	0.04–0.27	0.01–0.06
	R^2	0.34	0.98
Freundlich	1/n	0.45	0.06
	KF	2.61	5.80
	R^2	0.97	0.60
D-R	K(mol^2/kJ^2)	4.92	44.22
	E(kJ/mol)	0.32	0.11
	R^2	0.96	0.95
Temkin	BT (J/mol)	78.65	124.21
	AT (L/mg)	8.37	6.13
	R^2	0.93	0.95