The Adsorption of Pb, Zn, Cu, Ni, and Cd by Modified Ligand in a Single Component Aqueous Solution: Equilibrium, Kinetic, Thermodynamic, and Desorption Studies

Table 1

Langmuir, Freundlich, Temkin, and DKR isotherm parameters for binding of considered metal ions onto FGCX at temperature of 45°C.

Ions	Langmuir parameters			Freundlich parameters			Temkin parameters			DKR parameters
	(mmol/g)	(l/mmol)	(mmol/g)	(l/mmol)	(J/mol)	(mmol/g)	(kJ/mol)
	Pb	3.96	2	0.99	2.70	1.79	0.86	2.99	9.11	0.98	3.92	14.55	0.99
Cu	2.88	3.71	0.99	2.22	1.70	0.86	3.42	10.33	0.85	2.75	13.42	0.99
Ni	2.80	1.33	0.98	3.42	2.13	0.98	1.52	11.21	0.98	2.85	13.11	0.97
Cd	1.82	1.08	0.99	1.98	1.46	0.87	1.20	10.56	0.88	1.79	10.21	0.99
Zn	1.76	0.86	0.99	2.5	2.05	0.99	0.92	9.98	0.99	1.77	9.82	0.99