Table 8 Thermodynamic parameters of Fe@BC and BC for Pb(II) and Cu(II).
From: Adsorption of Fe-modified peanut shell biochar for Pb(II) in mixed Pb(II), Cu(II), Ni(II) solutions
Metal ions | Temperature (°C) | ∆G (kJ·mol−1) | ∆S (J·mol−1·K−1) | ∆H (kJ·mol−1) | ∆G (kJ·mol−1) | ∆S (J·mol−1·K−1) | ∆H (kJ·mol−1) |
|---|---|---|---|---|---|---|---|
BC | Fe@BC | ||||||
Pb | 25 | − 12.547 | 21.795 | − 5.948 | − 13.890 | 20.659 | − 7.765 |
35 | − 12.525 | − 14.241 | |||||
45 | − 12.830 | − 14.376 | |||||
55 | − 13.013 | − 14.196 | |||||
Cu | 25 | − 11.404 | 63.249 | 7.445 | − 13.822 | 52.784 | 1.872 |
35 | − 11.905 | − 14.452 | |||||
45 | − 12.881 | − 14.957 | |||||
55 | − 13.477 | − 15.454 | |||||
