Adsorption Kinetics for the Removal of Hazardous Dye Congo Red by Biowaste Materials as Adsorbents

Table 2

Isotherm parameters for the removal of congo red by GNC and EC at different temperatures.

		Adsorbents
Equations	Parameters	GNC			EC
		308 K	313 K	318K	308 K	313 K	318 K
	𝐾𝐹 (mg/g)(L/mg)^1/n	9.44	10.36	12.02	6.38	7.70	9.82
Freundlich	𝑁	1.56	1.58	1.57	2.23	2.25	2.28
	𝑅2	0.99	0.99	0.96	0.98	0.98	0.99
	𝐾𝐿 (L mg^−1)	0.064	0.067	0.078	0.059	0.071	0.088
Langmuir	𝐶𝑚 (mg g^−1)	106.38	112.35	117.64	45.24	49.75	56.81
	𝑅^2	0.98	0.96	0.99	0.97	0.98	0.99
	𝑞𝑠 ( mg g^−1)	51.26	55.25	60.78	30.29	33.58	39.36
Dubinin Radushkevih	𝐸 (KJ mol^−1)	0.380	0.381	0.412	0.223	0.250	0.294
	𝑅^2	0.96	0.97	0.99	0.91	0.94	0.96
	𝐾𝑇 (L mg^−1)	0.574	0.584	0.676	0.475	0.571	0.705
Temkin	𝐵1	23.73	25.36	26.97	10.93	12.00	13.75
	𝑅^2	0.98	0.99	0.99	0.98	0.98	0.99
	𝑁	0.97	0.99	1.00	0.98	0.98	0.99
Generalized	𝐾𝐺 (mg L^−1)	15.32	14.75	16.24	16.00	13.42	11.01
	𝑅^2	0.98	0.99	0.99	0.96	0.98	0.99