Absorbed Pb²⁺ and Cd²⁺ Ions in Water by Cross-Linked Starch Xanthate

Table 3

Isotherms constants and correlation coefficients for the adsorption of Pb²⁺ and Cd²⁺ on cross-linked starch xanthate.

Langmuir equation			⁢Freundlich equation
	Pb^2+	7.950		Pb^2+	2.236
	Cd^2+	3.576		Cd^2+	1.857
	Pb^2+	0.969		Pb^2+	0.998
	Cd^2+	0.977		Cd^2+	0.994
	Pb^2+	50 mg/g		Pb^2+	0.586
	Cd^2+	50 mg/g		Cd^2+	0.527