Halloysite@polydopamine/ZIF-8 Nanocomposites for Efficient Removal of Heavy Metal Ions

Table 2

Langmuir and Freundlich model parameters for adsorption isotherms.

Pollutants	Qeexp(mg/g)	Langmuir parameters			Freundlich parameters
		Qm (mg/g)	KL (L/mg)	R^2	Kf (mg/g)	n	R^2
Cu^2+	285	301.20	0.0457	0.9955	72.39	4.0616	0.9742
Pb^2+	520	515.46	0.1904	0.9940	164.44	4.2626	0.7396
Cd^2+	185	187.62	0.1703	0.9989	78.68	6.1782	0.7284
Ni^2+	112.5	116.41	0.0709	0.9988	47.46	6.4754	0.9399