A Novel Biosorbent, Water-Hyacinth, Uptaking Methylene Blue from Aqueous Solution: Kinetics and Equilibrium Studies

Table 1

Parameters and correlation coefficient of the studied isotherm models.

Model name	Evaluated parameters	𝑅^2
Langmuir isotherm	𝑞max=63.30 mg/g; 𝐾𝐿=0.0879 L/mg	0.9938
Freundlich isotherm	𝐾𝑓=21.22 (mg/g) (L/mg)^1/𝑛; 𝑛=4.737	0.9851
Temkin isotherm	𝐾𝑇=3.823 L/mg; 𝐵𝑇=9.4401	0.9873
Halsey isotherm	𝐾𝐻=5.51×10^−7 (L/g); 𝑛𝐻=−4.737	0.9851