Application of Wasted Oolong Tea as a Biosorbent for the Adsorption of Methylene Blue

Table 2

Adsorption isotherm fittings for the MB adsorption onto wasted tea powder.

Temperature (K)	Langmuir				Freundlich			Dubinin–Radushkevich			Temkin
	Qexp (mg·g^−1)	Qmax (mg·g^−1)	KL (L·mg^−1)	R^2	n	KF (L·mg^−1)	R^2	B (mol^2·kJ^−1)	Qmax (mg·g^−1)	R^2	BT (J·mol^−1)	AT	R^2
288	311.6	312.5	0.061	0.999	4.63	78.67	0.967	3.811	261.5	0.815	57.81	2.74	0.991
298	322.4	333.3	0.042	0.999	4.11	68.41	0.976	6.633	265.4	0.791	52.35	1.33	0.988
308	325.2	333.3	0.055	0.999	4.37	75.91	0.974	3.496	268.7	0.795	56.81	2.06	0.988
318	319.6	322.6	0.060	0.999	4.63	80.54	0.963	2.881	266.2	0.819	62.81	2.88	0.994
333	309.7	312.5	0.075	0.999	4.90	84.89	0.945	2.349	263.1	0.840	70.78	4.12	0.988