Table 2 Fitting results and comparison of the Langmuir and Freundlich Isotherm models constants for different initial MO and MR dyes by varying DRB-SO dose.
Isotherm model | Dye | Isotherm Parameters | DRB-SO dose | ||||
|---|---|---|---|---|---|---|---|
0.75 g/L | 1 g/L | 1.25 g/L | 1.5 g/L | 1.75 g/L | |||
Langmuir | MO | Qm (mg/g) | 144.93 | 138.89 | 133.33 | 108.70 | 95.24 |
Ka × 103 | 0.0437 | 0.1463 | 0.1794 | 0.2447 | 0.2770 | ||
R2 | 0.9951 | 0.9770 | 0.9274 | 0.9626 | 0.9612 | ||
Freundlich | Qm (mg/g) | 117.8 | 180.1 | 235.9 | 218.6 | 232.0 | |
Ka | 17.7 | 33.3 | 31.1 | 29.5 | 26.6 | ||
R2 | 0.9920 | 0.9716 | 0.9323 | 0.9594 | 0.9420 | ||
Langmuir | MR | Qm (mg/g) | 285.71 | 172.41 | 138.89 | 126.58 | 121.95 |
Ka × 103 | 0.3 | 1.2 | 1.5 | 1.5 | 1.5 | ||
R2 | 0.9993 | 0.9949 | 0.9976 | 0.9955 | 0.9976 | ||
Freundlich | Qm (mg/g) | 839.7 | 582.5 | 589.7 | 784.7 | 1764.9 | |
Ka | 73.8 | 87.7 | 77.0 | 72.3 | 76.3 | ||
R2 | 0.9787 | 0.9515 | 0.9190 | 0.9646 | 0.9959 | ||
