Table 3.
Phosphorus (P) adsorption kinetics parameter of Mg/biochar and biochar.
| Sample | Parameters | 1st-Order | 2nd-Order | Piratical-Order |
|---|---|---|---|---|
| B300 | Parameter 1 | k1 = (6.16 ± 0.36) × 10−3 | k2 = (0.850 ± 0.122) × 10−3 | Kid = (44.1 ± 4.5) × 10−3 |
| Parameter 2 | Qe = 7.57 ± 0.02 | Qe = 7.81 ± 0.06 | C = 6.53 ± 0.06 | |
| R2 | 0.997 | 0.992 | 0.923 | |
| B450 | Parameter 1 | k1 = (7.88 ± 0.61) × 10−3 | k2 = (1.20 ± 0.20) × 10−3 | Kid = (43.7 ± 5.7) × 10−3 |
| Parameter 2 | Qe = 7.62 ± 0.02 | Qe = 7.82 ± 0.05 | C = 6.63 ± 0.08 | |
| R2 | 0.994 | 0.989 | 0.880 | |
| B600 | Parameter 1 | k1 = (9.06 ± 1.04) × 10−3 | k2 = (1.55 ± 0.33) × 10−3 | Kid = (45.5 ± 6.9) × 10−3 |
| Parameter 2 | Qe = 7.74 ± 0.03 | Qe = 7.92 ± 0.06 | C = 6.74 ± 0.09 | |
| R2 | 0.987 | 0.982 | 0.840 | |
| Mg/B300 | Parameter 1 | k1 = (8.90 ± 1.73) × 10−3 | k2 = (1.45 ± 0.32) × 10−3 | Kid = (41.0 ± 5.2) × 10−3 |
| Parameter 2 | Qe = 7.99 ± 0.05 | Qe = 8.15 ± 0.06 | C = 7.09 ± 0.07 | |
| R2 | 0.962 | 0.981 | 0.884 | |
| Mg/B450 | Parameter 1 | k1 = (9.13 ± 1.47) × 10−3 | k2 = (1.40 ± 0.30) × 10−3 | Kid = (40.4 ± 5.5) × 10−3 |
| Parameter 2 | Qe = 8.04 ± 0.04 | Qe = 8.21 ± 0.06 | C = 7.16 ± 0.07 | |
| R2 | 0.974 | 0.983 | 0.871 | |
| Mg/B600 | Parameter 1 | k1 = (5.39 ± 1.42) × 10−3 | k2 = (0.778 ± 0.251) × 10−3 | Kid = (40.6 ± 3.7) × 10−3 |
| Parameter 2 | Qe = 8.25 ± 0.09 | Qe = 8.44 ± 0.11 | C = 7.27 ± 0.05 | |
| R2 | 0.944 | 0.962 | 0.938 |