Adsorption of Dye by Waste Black Tea Powder: Parameters, Kinetic, Equilibrium, and Thermodynamic Studies

Table 1

Fitting results for pseudo-first-order and pseudo-second-order kinetic models.

MB concentration (mg·L^−1)	Pseudo-first-order model				Pseudo-second-order model
	Qexp (mg·g^−1)	k1 (min^−1)	R^2	Qcal (mg·g^−1)	k2 (min^−1)	R^2	Qcal (mg·g^−1)
100	24.98	0.06	0.90	1.49	0.13	0.99	25.06
700	160.49	0.06	0.94	10.60	0.01	0.99	161.29
1600	279.23	0.07	0.96	36.90	0.01	0.99	277.78