Removal of Textile Dyes by Chemically Treated Sawdust of Acacia: Kinetic and Equilibrium Studies

Table 2

Pseudo-first-order and pseudo-second-order kinetic parameters for the sorption of BB and MB onto A-NaOH and A-HCl.

Dye	Biosorbent	qexp (mg/g)	Pseudo-first-order			Pseudo-second-order
			qe (mg/g)	k1 (1/min)	r^2	qe (mg/g)	k2 (g/mg min)	r^2
BB	A-NaOH	7.789	7.705	0.329	0.989	7.592	0.607	0.987
	A-HCl	6.758	6.436	8.955	0.964	6.491	1.158	0.963
MB	A-NaOH	223.46	227.38	0.044	0.998	187.43	−1.008	0.740
	A-HCl	209.00	221.77	0.030	0.999	163.92	1.194	0.988