Comparison of Langmuir Freundlich Temkin

	Single Component System			Multi-component system
Metal	R²	q_max(mg/g)	b	R²	q_max(mg/g)	b
Langmiur Isotherm Parameters
Lead	0.98	90.09	0.0089	0.96	3.86	0.079
Cadmium	0.99	23.20	0.0165	0.86	4.75	0.271
Copper	0.98	21.01	0.0156	0.89	4.58	1.600
Metal	R²	K_f(mg/g)	1/n	R²	K_f(mg/g)	1/n
Freundlich Isotherm Parameters
Lead	0.98	0.82	0.98	0.99	1.8e-3	2.07
Cadmium	0.99	0.90	0.38	0.89	1.09	2.04
Copper	0.97	0.39	1.16	0.99	1.66	2.63
Metal	R²	K_T	B_T(kJ/mol)	R²	K_T	B_T(kJ/mol)
Temkin Isotherm Parameters
Lead	0.93	5.19	3.55	0.97	0.94	0.77
Cadmium	0.95	3.77	3.31	0.75	0.51	0.43
Copper	0.96	2.56	2.77	0.93	0.78	0.98
Metal	R²	A	B	R²	A	B
Harkin-Jura Isotherms
Lead	0.80	3.51	1.00	0.92	0.65	1.09
Cadmium	0.85	1.35	1.02	0.98	0.35	0.48
Copper	0.83	3.51	1.29	0.93	0.26	0.34
Metal	R²	K	n	R²	K	n
Halsey Isotherms
Lead	0.98	1.21	0.98	0.99	1.89	0.48
Cadmium	0.99	2.24	0.88	0.89	1.04	0.54
Copper	0.97	3.02	1.16	0.99	145.9	3.83

Table 1: Comparison of Langmuir,Freundlich,Temkin,Harkin’s-Jura and Halsey isotherm constants for single and multi-component adsorption of Pb (II), Cd (II) and Cu (II) on raw wheat straw at room temperature (30°C).

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