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

Table 4

Parameters of kinetic models for adsorption of Cu(II), Ni(II), Cd(II), and Pb(II) in clays: sodium (SC) and ferric (FC). Experimental conditions: acetate buffer , . .

Ion	Clay	Ho model				Elovich model
		Cu(II)	SC	27.93	28.16	0.084	0.999	28.38		2.37	0.722
FC	21.24		21.50	0.195	0.999	22.12		2.39	0.670
Ni(II)	SC	20.90	20.70	0.044	0.993	20.40		0.818	0.713
	FC	17.29	17.12	0.270	0.999	17.71		1.035	0.782
Cd(II)	SC	16.41	16.66	0.065	0.999	16.86		0.720	0.898
	FC	18.82	18.83	0.184	0.999	19.35		1.087	0.515
Pb(II)	SC	33.87	33.55	0.056	0.999	34.66		0.357	0.931
	FC	32.80	33.11	0.760	0.999	43.74		0.539	0.537

(mg g^-1); (g mg^-1 min^-1); (mg g^-1 min^-1); and (mg g^-1).