Kinetics parameters of CR adsorption on OBC and NOBC.

Sampe	OBC	NOBC
q e,exp (mg g−1)	164.33	308.33
Pseudo-first-order model
q e,calc (mg g−1)	68.63	63.43
K 1 (min−1)	0.0086	0.0077
R 1 2	0.9450	0.5780
Pseudo-second-order model
q e,calc (mg g−1)	161.81	292.40
K 2 (g mg−1 min−1)	0.00050	0.00037
R 2 2	0.998	0.999
Intraparticle diffusion model
C	0.7937	0.9233
K p	5.2298	6.1633
R 3 2	0.9290	0.6581