Study on Adsorption of Cu and Ba from Aqueous Solutions Using Nanoparticles of Origanum (OR) and Lavandula (LV)

Table 1

Kinetic model parameters for the metal ion adsorption onto OR and LV.

Kinetic model	Parameter	Adsorbent (OR)		Adsorbent (LV)
		Cu	Ba	Cu	Ba
	qe,exp (mg/g)	1.86	1.75	1.79	1.90
Pseudo-first order	qe,calc (mg/g)	0.54	0.52	0.50	0.74
	K1 × 10^3(min^−1)	8.52	13.36	7.60	6.91
	R^2	0.904	0.669	0.962	0.823
Pseudo-second order	qe,calc (mg/g)	1.88	1.75	1.78	1.88
	K2 × 10^3 (g/mg·min)	36.96	30.92	41.81	24.37
	h (mg/g·min)	0.13	0.09	0.13	0.09
	t1/2 (min)	14.43	18.52	13.45	21.80
	R^2	0.999	0.999	0.999	0.996