Table 3.

Fit parameters of three isothermal models for the adsorption of As(III), Pb(II), and Zn(II) by sodium alginate composite gel.

	Langmuir model				Freundlich model
	qn mg·g−1	kl mg·l−1	R 2	SE	k e	1/n	R 2	SE
As(III)	3.260	0.001	0.580	15.963	100.786	0.742	0.861	0.460
Pb(II)	11.723	0.019	0.817	1.548	1.076	0.356	0.870	0.902
Zn(II)	1.607	0.026	0.884	10.865	6.079	0.379	0.735	1.025