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Pseudo-first and second-order rate constants and correlation coefficients obtained for Cr6+ and Pb2+ adsorption on L-Cyst-Fe3O4 NPs.
| Metals | Pseudo-first-order rate constants | Pseudo-second-order rate constants | ||
|---|---|---|---|---|
| k1 | R2 | k2 | R2 | |
| Pb2+ | 0.08 | 0.9478 | 0.47 | 0.9850 |
| Cr6+ | 0.08 | 0.8930 | 0.40 | 0.9611 |
