Table 1 Fitting parameters for the Cd adsorption isotherms of S. europaea biochar (SBC) and Z. mays biochar (ZBC) (biochar dosage 20 mg, initial concentrations of Cd2+ 5–100 mg L−1, contact time 8 h, pH 6.0).
Adsorbent | oC | Langmuir parameters | Freundlich parameters | ACPA (mg m−2) | ||||
|---|---|---|---|---|---|---|---|---|
b (L mg−1) | qm (mg g−1) | R2 | Kf (mg1−1/n g−1 L1/n) | 1/n | R2 | |||
SBC | 15 | 1.18 | 100.28 | 0.89 | 47.04 | 0.26 | 0.80 | 16.75 |
25 | 6.04 | 108.54 | 0.97 | 70.42 | 0.19 | 0.81 | ||
35 | 1.24 | 107.33 | 0.90 | 51.03 | 0.27 | 0.84 | ||
ZBC | 15 | 1.01 | 14.18 | 0.98 | 8.01 | 0.15 | 0.96 | 3.54 |
25 | 2.37 | 14.69 | 0.99 | 10.13 | 0.09 | 0.92 | ||
35 | 1.25 | 15.44 | 0.96 | 9.21 | 0.13 | 0.94 | ||
