Table 4.

Comparison of estimated parameters obtained from the Langmuir, Freundlich, Temkin, and Dubinin–Radushkevich isotherms for phenol on NaP1 and NaP1CS.

Isotherm	Parameters	293 (K)	313 (K)	333 (K)
NaP1
Langmuir	KL (L/mg)	0.002	0.001	1.510
	RL	0.980	0.983	0.051
	qe (mg/g)	8.40	6.60	4.60
	R2	0.629	0.626	0.999
Freundlich	n	0.780	0.844	7.169
	KF (mg/g(L/mg)1/n)	228.81	145.46	2.22
	R2	0.966	0.903	0.927
Temkin	A (L/g)	22.832	20.535	93.076
	B (J/mol)	2.17	1.87	0.47
	R2	0.683	0.805	0.951
Dubinin-Radushkievich	Xm (mg/g)	806.5	1119.1	1014.5
	E (kJ/mol)	5.8	6.1	18.6
	R2	0.945	0.872	0.952
NaP1CS
Langmuir	KL (L/mg)	0.012	0.020	0.004
	RL	0.868	0.804	0.953
	qe (mg/g)	14.00	26.00	4.20
	R2	0.700	0.848	0.505
Freundlich	n	0.560	2.983	0.821
	KF (mg/g(L/mg)1/n)	1204.32	2.67	252.05
	R2	0.889	0.939	0.951
Temkin	kT (L/g)	19.574	1.720	20.485
	B (J/mol)	4.02	2.54	1.36
	R2	0.900	0.937	0.855
Dubinin-Radushkievich	Xm (mg/g)	85.2	2146.7	1194.1
	E (kJ/mol)	4.9	7.9	5.8
	R2	0.900	0.938	0.962