Thermodynamics of Biosorption for Removal of Co(II) Ions by an Efficient and Ecofriendly Biosorbent (Saccharum bengalense): Kinetics and Isotherm Modeling

Table 3

Equilibrium isotherm parameters of biosorption of Co(II) on SB.

Adsorption isotherm	Linear form	Constant parameters
Langmuir isotherm	1𝑞𝑒=1/𝐾𝐿⋅𝑞𝑚⋅1𝐶𝑒+1𝑞𝑚	𝑞𝑚  (mg/g)	𝐾𝐿	𝑅^2
		14.51	0.013	0.995
Freundlich isotherm	ln𝑞𝑒=ln𝐾𝐹+1𝑛ln𝐶𝑒	𝐾𝐹	n	𝑅^2
		0.225	1.131	0.980
(D-R) isotherm	ln𝑞𝑒=ln𝑞𝑚−𝛽𝜀^2	𝛽	𝑞𝑚	𝑅^2  𝐸𝑠  (kJ/mol)
		−4 × 10^−6	3.01	0.800  0.353
Temkin isotherm	𝑞𝑒=𝛽ln𝛼+𝛽ln𝐶𝑒	B	𝐾𝑇  (L/mg)	𝑅^2
		0.546	8.77	0.911