The mathematical characteristics of the traditional isotherm models under consideration.

			293 K	303 K	313 K
DI	Langmuir model	Q max (mg g−1)	190.2	164.2	137.7
		b (L mg−1)	3.7 × 10−7	3.24 × 10−7	1.51 × 10−8
		R 2	0.99	0.99	0.99
		χ 2	0.05	0.13	0.17
	Freundlich model	1/n	0.80	0.84	0.94
		k F (mg g−1)	2.27	1.61	1.24
		R 2	0.82	0.85	0.83
		χ 2	4.92	3.17	3.59
	D–R model	β (mol2 kJ−2)	0.041	0.046	0.056
		Q m (mg g−1)	201.7	174.3	147.9
		R 2	0.999	0.99	0.99
		χ 2	0.05	0.028	0.17
		E (kJ mol−1)	3.49	3.29	2.98
ZD	Langmuir model	Q max (mg g−1)	258.6	219.8	178.3
		b (L mg−1)	2.8 × 10−6	1.43 × 10−7	2.03 × 10−8
		R 2	0.99	0.99	0.99
		χ 2	0.35	0.71	0.38
	Freundlich model	1/n	0.83	0.87	0.90
		k F (mg g−1)	2.67	1.84	1.2
		R 2	0.86	0.84	0.82
		χ 2	4.43	5.71	6.99
	D–R model	β (mol2 kJ−2)	0.016	0.021	0.032
		Q m (mg g−1)	265.6	229.3	190.6
		R 2	0.99	0.99	0.99
		χ 2	0.33	0.21	0.29
		E (kJ mol−1)	5.6	4.9	3.95
CD/ZD	Langmuir model	Q max (mg g−1)	297.7	260.8	213.2
		b (L mg−1)	7.7 × 10−7	3.4 × 10−7	6.1 × 10−7
		R 2	0.99	0.99	0.99
		χ 2	0.029	0.011	0.067
	Freundlich model	1/n	0.81	0.87	0.84
		k F (mg g−1)	3.53	2.21	2.03
		R 2	0.84	0.85	0.86
		χ 2	6.12	5.24	5.02
	D–R model	β (mol2 kJ−2)	0.0081	0.0088	0.011
		Q m (mg g−1)	312.5	275.9	223.6
		R 2	0.99	0.99	0.99
		χ 2	0.19	0.31	0.087
		E (kJ mol−1)	7.85	7.5	6.7