Removal of Toxic Metal Ions from Aqueous Solutions in Integrated Clay Adsorption and Electroflotation

Table 2

Langmuir, Freundlich, and Temkin isotherm models’ constants and coefficients of determination for adsorption of Cu(II), Ni(II), Cd(III), and Pb(III) onto sodium clay (SC) and ferric clay (FC).

Íons	Langmuir model								Freundlich model			Temkin model
	Clay				%Error		SSE	Hybrid
Cu(II)	SC		0.065	0.994	12.5	0.974	12.4	6.8	6.261	15.39	0.979	7.613	0.515	0.842
	FC		0.036	0.986	5.4	0.956	9.5	4.3	3.098	5.583	0.988	6.076	0.690	0.977
Ni(II)	SC		0.035	0.990	4.7	0.972	13.8	6.9	2.785	3.705	0.959	4.917	0.582	0.961
	FC		0.198	0.986	4.1	0.961	14.4	7,5	8.682	8.654	0.622	1.366	523.8	0.591
Cd(II)	SC		0.044	0.983	5.4	0.957	15.5	8.7	2.840	2.815	0.887	5.593	0.283	0.949
	FC		0.259	0.989	8.9	0.954	18.4	8,9	7.716	5.476	0.787	1.189	47.09	0.740
Pb(II)	SC		0.017	0.978	9.1	0.969	21.9	9.7	1.862	2.531	0.928	10.26	0.211	0.967
	FC		0.093	0.995	4.2	0.975	7.4	3.8	4.249	3.358	0.828	1.891	2.133	0.841