Adsorption Characteristics of Bixin on Acid- and Alkali-Treated Kaolinite in Aprotic Solvents

Table 4

Adsorption kinetics parameters for the adsorption of bixin on kaolinite.

Solvent	Adsorbent	qe exp	Pseudo-first order			Pseudo-second order
			qe1	k1 (10^−2)	r^2	qe2	h (10^−2)	k2	r^2
Acetone	KN	0.25	0.21	2.53	0.9697	0.26	2.07	0.32	0.9951
	KA	0.21	0.16	1.17	0.8969	0.21	1.07	0.25	0.9823
	KB	0.35	0.09	1.70	0.6928	0.33	35.7	3.27	0.9956
Dimethyl carbonate	KN	0.29	0.20	1.77	0.9300	0.28	2.84	0.35	0.9947
	KA	0.25	0.15	1.77	0.9549	0.24	4.05	0.68	0.9962
	KB	0.45	0.12	1.31	0.6456	0.44	20.5	1.08	0.9991