Facile Synthesis of Graphene Oxide/Titanate Nanotube Composites and Their Application for Cobalt(II) Removal

Table 1

Kinetics parameters for Co(II) ions adsorption on the GTNT composites.

Equations		First-order kinetics			Second-order kinetics
		Co (mg/L)	qe,exp (mg/g)	k1 (1/min)	qe,cal (mg/g)	R^2	k2 (g/(mg·min))	qe,cal (mg/g)	R^2
20	19.56	0.11	16.43	0.971	0.203	19.85	0.999