Table 4.

The parameters for Langmuir, Freundlich, and Temkin adsorption isotherms.

Model	Parameters	System
		Zn(II)	Zn(II)-Cu(II)-Sr(II)	Zn(II)-Ni(II)-Cu(II)	Zn(II)-Cu(II)-Sr(II)-Ba(II)
Langmuir	qm, mg/g	8.99	10.4	17	12
	b, L/mg	0.002	0.01	0.005	0.009
	R 2	0.99	0.99	0.99	0.99
Freundlich	KF, mg/g	0.43	0.25	0.17	0.25
	1/n	0.59	0.67	0.77	0.7
	R 2	0.98	0.99	0.98	0.99
Temkin	aT, L/g	0.17	0.14	0.11	0.13
	B, J/mol	3.26	1.3	1.07	1.1
	R 2	0.98	0.96	0.92	0.96