Table 2 The kinetic parameters for the adsorption of Congo red onto the prepared nanocomposites.
From: Itaconic acid-modified layered double hydroxide/gellan gum nanocomposites for Congo red adsorption
Model | Adsorbent | R2 | Parametersa | ||
|---|---|---|---|---|---|
PFO | NC-1% | 0.8583 | k1 = 2.95 × 10–3 | qe = 165.5 | |
NC-3% | 0.8272 | k1 = 2.92 × 10–3 | qe = 185.6 | ||
NC-5% | 0.8372 | k1 = 2.85 × 10–3 | qe = 185.7 | ||
PSO | NC-1% | 0.9909 | k2 = 5.83 × 10–5 | qe = 138.9 | h = 1.1247 |
NC-3% | 0.9926 | k2 = 7.83 × 10–5 | qe = 135.1 | h = 1.4286 | |
NC-5% | 0.9906 | k2 = 1.01 × 10–4 | qe = 137.1 | h = 1.8825 | |
Elovich | NC-1% | 0.9480 | α = 3.098 | β = 0.0399 | |
NC-3% | 0.9499 | α = 3.652 | β = 0.0378 | ||
NC-5% | 0.9347 | α = 4.559 | β = 0.0354 | ||
IPD | NC-1% | 0.9863 | kdif = 7.1173 | C = − 10.80 | |
NC-3% | 0.9939 | kdif = 7.5568 | C = − 8.75 | ||
NC-5% | 0.9918 | kdif = 8.0264 | C = − 4.64 | ||
