Study of Isothermal, Kinetic, and Thermodynamic Parameters for Adsorption of Cadmium: An Overview of Linear and Nonlinear Approach and Error Analysis

Table 2

Linear and nonlinear parameters of isothermal models for sorption of Cd onto Saccharum arundinaceum

Models	Linear method	Nonlinear method
Freundlich
KF (mg/g) (L/mg)^n	9.4558	12.2001
N	2.42	3.0271
R^2	0.9446
Langmuir
Qo (mg/g)	48.309	48.0821
b (L/mg)	0.1446	0.1461
RL	0.408	0.406
R^2	0.9958
Dubinin–Radushkevich
(mol^2/kJ^2)	0.6543	3.1816
qs (mg/g)	34.3533	39.667
R^2	0.7912
Temkin
Β (J/mol)	264.39	161.8954
KT	1.0227	0.38
R^2	0.9852
Elovich
Qm (mg/g)	16.58	17.2006
KE (L/mg)	1.1677	0.6631
R^2	0.9433