Table 8 Parameters of pseudo-first-order and pseudo-second-order constants obtained for the adsorption of As(III) using ZnO/Hal nanocomposite.
From: Facile synthesis of ZnO/Hal nanocomposite for arsenite (As(III)) removal from aqueous media
Isotherm model | Linear equation | Parameter | Description | Result |
|---|---|---|---|---|
Pseudo-first-order model (PFO) | \(\mathrm{ln}\left({q}_{e}-{q}_{t}\right)=\mathrm{ln}{q}_{e}-{k}_{1}t\) | qe | Equilibrium adsorption capacity | 10.10 |
k1 | Rate constant (min−1) | − 0.0155 | ||
R2 | Egression coefficients | 0.81 | ||
Pseudo-second-order model (PSO) | \(\frac{t}{{q}_{t}}=\frac{1}{{k}_{2}{q}_{e}^{2}}+\frac{1}{{q}_{e}}t\) | qe | Equilibrium adsorption capacity | 18.67 |
k2 | Rate constant (min−1) | 0.0011 | ||
R2 | Egression coefficients | 0.98 |
