. 2023 Jul 6;9(7):e17189. doi: 10.1016/j.heliyon.2023.e17189

Table 4.

Langmuir and Freundlich parameters for the adsorption of phenol by the activated carbons produced from the different biomasses.

Molecule	ACs	Langmuir parameters			Freundlich parameters
Molecule	ACs	q_m	K_L	R²	K_F	1/n	R²
Phenol	Acai	159.95	0.060	0.738	29.55	0.274	0.807
	Babassu	596.69	0.010	0.949	29.31	0.468	0.969
	Brazil nut	399.50	0.010	0.806	11.19	0.563	0.915
	Oil palm shell	391.00	0.002	0.910	10.82	0.524	0.982

Where = q_m: maximum adsorption capacity (mg.g⁻¹); K_L: Langmuir Constant (L.mg⁻¹); R²: correlation coefficient; K_F: Freundlich constant [(mg L⁻¹)(L.mg⁻¹)^1/n]; 1/n: Freundlich parameter.