Nickel Removal from Aqueous Solution Using Chemically Treated Mahogany Sawdust as Biosorbent

Table 2

Pseudo-first-order and pseudo-second-order kinetic models for the adsorption of Ni(II) on mahogany sawdust.

Metal (mg/L)	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
40	2.44	0.20	0.0073	0.8119	2.45	0.2208	0.9998
50	3.05	0.89	0.0132	0.9582	3.11	0.067	0.9982