| Biosorbent | Metal ion | Freundlich | Langmuir | |||||
| KF (mg/g) | n | R2 | Q (mg/g) | b (L/mg) | R2 |
| ||
| Cu(II) | 2.26 | 7.87 | 0.768 | 3.89 | 4.36 | 0.998 |
| |
| CTS | Pb(II) | 5.75 | 3.38 | 0.995 | 25.00 | 0.13 | 0.955 |
|
| Zn(II) | 0.53 | 1.47 | 0.999 | 23.81 | 0.01 | 0.913 |
| |
| Cu(II) | 4.10 | 2.45 | 0.908 | 34.48 | 0.04 | 0.718 |
| |
| ES | Pb(II) | 18.92 | 3.13 | 0.465 | 90.90 | 0.44 | 0.998 |
|
| Zn(II) | 1.28 | 1.58 | 0.990 | 35.71 | 0.02 | 0.900 |
| |
| Cu(II) | 1.30 | 4.65 | 0.883 | 3.65 | 0.21 | 0.988 |
| |
| SB | Pb(II) | 2.12 | 2.19 | 0.979 | 21.28 | 0.05 | 0.948 |
|
| Zn(II) | 0.31 | 1.23 | 0.999 | 40.00 | 0.00 | 0.877 |
| |