Table 2 Freundlich and Langmuir isotherms parameters for crystal violet adsorption on sodium titanates at room temperature
From: Improved production of titanate nanotubes by hydrothermal method for adsorption of organic dyes
Isotherm | Crystal violet | Parameters description |
|---|---|---|
Langmuir | 1.0000 1.0000 100 0.01 | R2 is the regression coefficient RL value lies between 0 and 1 for favorable adsorption RL higher than 1 means unfavorable adsorption, RL equal to 1 represents linear adsorption RL = 0 adsorption process is irreversible qm is the maximum adsorption capacity of adsorbent, expressed in mg/g KL is the constant of Langmuir model |
Freundlich | 0.98852 0.99 1.2 0.9 | R2 is the regression coefficient Kf and n are the Freundlich constants and give indication about the maximum adsorption capacity If 1/n is less than 0.5, the adsorption would be easily carried out If 1/n is larger than 0.5, the adsorption is difficult |