Table 4 Langmuir and Freundlich parameters for the adsorption of MB onto SAL, Ac-SAL, and Ph-SAL.
From: Chemical modification of lignin derived from spent coffee grounds for methylene blue adsorption
Adsorbent | Freundlich model | Langmuir model | |||||
|---|---|---|---|---|---|---|---|
KF (mg g−1) (L mg−1)(1/n) | 1/n | R2 | KL (L mg−1) | Qmax (mg g−1) | R2 | RL | |
SAL | 19.915 | 0.497 | 0.930 | 0.511 | 66.225 | 0.993 | 0.1634–0.0191 |
Ac-SAL | 26.201 | 0.353 | 0.879 | 0.7722 | 71.942 | 0.995 | 0.1146–0.0127 |
Ph-SAL | 52.831 | 0.343 | 0.853 | 3.2424 | 93.457 | 0.993 | 0.0299–0.0030 |
