Calculated kinetic parameters of RR24 adsorption onto pristine and modified biochars.

	Adsorbent
	SBB	SBB-ZnO3	CRHB	CRHB-ZnO3
Pseudo-first order model
q e (mg g−1)	71.63	94.31	66.57	82.54
k 1 (g (mg−1 min−1))	0.1179	0.0907	0.0716	0.0718
R 2	0.9884	0.9778	0.9878	0.9892
Pseudo-second order model
q e (mg g−1)	78.61	98.01	65.51	84.28
k 2 (min−1)	0.0021	0.0015	0.0012	0.0015
R 2	0.9909	0.9609	0.9629	0.9769