Table 2.
Partition coefficient (Kd) for sorption isotherms of herbicides on soil and biochars.
| Adsorbent | monuron | diuron | linuron | |
|---|---|---|---|---|
| Yolo soil |
Kd5 Kd50 |
0.0075±0.0029 0.0025±0.00074 |
0.016±0.0024 0.011±0.0037 |
0.069±0.0056 0.02±0.0031 |
| EB |
Kd5 Kd50 |
0.2±0.043 0.052±0.0037 |
0.27±0.094 0.092±0.012 |
0.24±.044 0.078±.016 |
| HW |
Kd5 Kd50 |
0.041±0.0083 0.026±0.0010 |
0.16±0.034 0.034±0.0013 |
0.21±0.0051 0.043±0.0056 |
| TL |
Kd5 Kd50 |
0.68±0.093 0.15±0.042 |
0.61±0.0068 0.23±0.054 |
-*
0.28±0.058 |
| WF |
Kd5 Kd50 |
- 0.15±0.045 |
- 0.11±0.0071 |
- 0.18±0.070 |
| WS |
Kd5
Kd50 |
- 2.5±0.85 |
- - |
- - |
*
The equilibrium concentration was below detection limit due to the high sorption capacity of biochar.