Evaluation of Adsorption Capacity in Water of Coffee Husk-Derived Biochar at Different Pyrolysis Temperatures

Table 5

adsorption kinetics parameters of biochar.

Models	Pyrolytic temperature	qe (mg·g^−1)	Kinetic constant	qe of experiment, mg·g^−1	R^2
Pseudo-first-order	Biochar 300°C	-0.19	k1(1. min^−1) =0.025	0.74	0.9
	Biochar 450°C	0.22	k1(1. min^−1) =0.051	0.70	0.89
	Biochar 600°C	0.24	k1(1. min) =0.065	0.69	0.9
Pseudo-second-order	Biochar 300°C	0.77	k2 (g.mg^−1.min^−1)) =0.314	0.74	0.92
	Biochar 450°C	0.78	k2 (g.mg^−1.min^−1)) ==0.200	0.70	0.93
	Biochar 600°C	0.75	k2 (g.mg^−1.min^−1)) ==0.247	0.69	0.92