Table 4 Parameters of the kinetic models for the adsorption of the uranium ions on the HAP sorbent
From: Adsorption of Uranyl Ions at the Nano-hydroxyapatite and Its Modification
Model | Parameter | C-HAP | P-HAP | HAP |
|---|---|---|---|---|
Pseudo-first-order | k 1 (min−1) | 0.00022 | 0.004 | 0.00011 |
q ecalc (mol × g−1) | 9.2 × 10−7 | 9.3 × 10−7 | 9.12 × 10−7 | |
R 2 | 0.5567 | 0.6577 | 0.7907 | |
Pseudo-second-order | k 2 (g × mo−1 × min−1) | 45.55 | 22.13 | 11.52 |
q ecalc (mol × g−1) | 0.0025 | 0.00251 | 0.00254 | |
R 2 | 0.9997 | 0.9998 | 0.9999 |