Adsorption of As(III), Pb(II), and Zn(II) from Wastewater by Sodium Alginate Modified Materials

Table 2

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

	Parameters	As(III)	Pb(II)	Zn(II)
Pseudo-first-order kinetic model	qe (mg g^−1)	0.3440	1.6225	0.4936
	k1 (min^−1)	0.1025	0.0690	0.0008
	ε^2	0.0001	0.0013	0.0031
	R^2	0.9567	0.7707	0.9598
Pseudo-second-order kinetic model	qe (mg g^−1)	0.3514	1.6569	0.5252
	k2 (min^−1)	0.0097	0.0156	0.0957
	ε^2	0.0001	0.0003	0.0001
	R^2	0.9874	0.9545	0.9841