Table 4 The parameter of kinetic models with the addition of 0.1 mM CA
From: Deciphering the effect of citric acid on arsenic adsorption with phosphorene in aqueous solution
Pseudo-first-order | ||||
Temperature (°C) | 15 | 25 | 35 | 45 |
k1 (min−1) | 0.014 | 0.024 | 0.012 | 0.192 |
R2 | 0.866 | 0.511 | 0.977 | 0.933 |
Pseudo-second-order | ||||
Temperature (°C) | 15 | 25 | 35 | 45 |
k2 (g mg−1 min−1) | 4.0 | 1.1 | 0.36 | 0.15 |
R2 | 0.999 | 0.999 | 0.998 | 0.998 |
Intra-particle diffusion | ||||
Temperature (°C) | 15 | 25 | 35 | 45 |
I (mg g−1) | 0.038 | 0.386 | 0.124 | 0.579 |
kid (mg g−1 min1/2) | 0.39 | 1.8 | 5.7 | 0.34 |
R2 | 0.807 | 0.906 | 0.787 | 0.307 |
Elovich | ||||
Temperature (°C) | 15 | 25 | 35 | 45 |
a (mg g−1 min−1) | 0.31 | 1.37 | 3.4 | 8.7 |
b (g μg−1) | −0.023 | −0.023 | −0.208 | −0.791 |
R2 | 0.887 | 0.804 | 0.964 | 0.919 |