Table 1 Freundlich adsorption-desorption isotherm parameters of 14 C-catechol on soil and carbonaceous adsorbents (Biochar, Activated carbon, SWCNTs, and MWCNTs).
Adsorbents | Adsorption | Desorption | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
log KF (mmol1-n Ln/kg) | n | R 2 | log Kd | log KF(mmol1-n Ln/kg) | n | R 2 | log Kd | |||
0.01 mmol/L | 0.1 mmol/L | 0.01 mmol/L | 0.1 mmol/L | |||||||
Soil | 2.55 ± 0.07 | 0.67 ± 0.01 | 0.99 | 3.22 | 2.89 | 3.19 ± 0.06 | 0.74 ± 0.02 | 0.99 | 3.71 | 3.45 |
Biochar | 4.13 ± 0.01 | 0.92 ± 0.01 | >0.99 | 4.28 | 4.20 | 4.51 ± 0.02 | 0.92 ± 0.02 | > 0.99 | 4.66 | 4.59 |
Activated carbon | 4.28 ± 0.08 | 0.62 ± 0.04 | 0.98 | 5.05 | 4.67 | 4.68 ± 0.03 | 0.91 ± 0.01 | > 0.99 | 4.86 | 4.77 |
SWCNTs | 4.99 ± 0.12 | 0.59 ± 0.02 | 0.99 | 5.66 | 5.32 | 5.45 ± 0.10 | 0.71 ± 0.03 | 0.99 | 6.02 | 5.74 |
MWCNTs | 4.61 ± 0.04 | 0.71 ± 0.01 | >0.99 | 5.28 | 4.95 | 5.06 ± 0.04 | 0.75 ± 0.01 | > 0.99 | 5.55 | 5.30 |
