Adsorption, Modeling, Thermodynamic, and Kinetic Studies of Methyl Red Removal from Textile-Polluted Water Using Natural and Purified Organic Matter Rich Clays as Low-Cost Adsorbent

Table 6

Langmuir, Freundlich, and Dubinin-Radushkevich (D-R) parameters.

	Langmuir		Freundlich		D-R
ANb	Q0 (mgg^−1)	59.180	KF (Lg^−1)	3.480	V’m (molg^−1)	6.529
	KL (Lmg^−1)	0.007	1/n	2.125	K’ (mol^2kJ^−2)	−0.321
	R^2	0.788	N	0.471	E (KJmol^−1)	1.248
	RL	0.999	R^2	0.962
ANp	Q0 (mgg^−1)	−86.207	KF (Lg^−1)	1.809	V’m (molg^−1)	1.954
	KL (Lmg^−1)	−0.003	1/n	1.973	K’ (mol^2kJ^−2)	−0.111
	R^2	0.344	n	0.507	E (KJmol^−1)	2.119
	RL	1.000	R^2	0.754