Table 2. Equilibrium Isotherm Parameters of LBF and LBZ for RB4 Dye Adsorptions.

regression method	isotherm model	parameter	LBF	LBZ
linear	Langmuir	qm(mg/g)	3.229	2.589
		KL(L/mg)	0.091	0.050
		R2	0.986	0.980
	Freundlich	1/n	0.449	0.268
		KF(mg/g) (L/mg)1/n	0.518	0.514
		R2	0.992	0.993
	Temkin	bT(J/mol)	3337.822	4167.999
		AT(L/g)	0.778	0.426
		R2	0.987	0.979
	Dubinin–Radushkevich	qm(mg/g)	1.964	1.542
		KDR(mol2/J2)	0.027	0.081
		E (kJ/mol)	4.327	2.486
		R2	0.882	0.856
nonlinear	Langmuir	qm(mg/g)	3.239	2.617
		KL(L/mg)	0.090	0.049
		R2	0.987	0.982
		Radj2	0.984	0.978
		RMSE	0.061	0.052
	Freundlich	1/n	0.464	0.270
		KF(mg/g) (L/mg)1/n	0.505	0.512
		R2	0.992	0.992
		Radj2	0.990	0.990
		RMSE	0.049	0.036
	Temkin	bT(J/mol)	3381.262	4564.646
		AT(L/g)	0.701	0.440
		R2	0.989	0.977
		Radj2	0.987	0.973
		RMSE	0.068	0.060
	Dubinin–Radushkevich	qm(mg/g)	1.712	1.319
		KDR(mol2/J2)	0.022	0.061
		E (kJ/mol)	4.784	2.866
		R2	0.897	0.857
		Radj2	0.877	0.828
		RMSE	0.212	0.164