. 2015 Jul 29;5:12638. doi: 10.1038/srep12638

Table 5. Adsorption isotherm parameters for the adsorption of crystal violet onto Fe₃O₄ coated biochar at various temperatures.

T(°C)	Q_exp(mg/g)	Langmuir constants			Freundlich constants			Temkin constants
T(°C)	Q_exp(mg/g)	Q_max (mg/g)	K_L (L/mg)	R²	n	K_F (L/mg)	R²	A_T (L/mol)	B_T (J/mol)	R²
20	279.43	278.55	0.071	0.984	3.65	69.43	0.977	0.26	59.23	0.946
30	292.14	289.91	0.089	0.981	4.07	83.51	0.971	0.24	894	0.980
40	349.49	356.71	0.870	0.999	4.00	171.80	0.978	0.24	1045	0.979

Table 5. Adsorption isotherm parameters for the adsorption of crystal violet onto Fe3O4 coated biochar at various temperatures.