Table 4 Calculated kinetic parameters for the adsorption of Cd2+, Pb2+,  and Cr3+ on to Co-DPA
From: Adsorptive removal of heavy metals from wastewater using Cobalt-diphenylamine (Co-DPA) complex
Kinetic model | ||||||||
|---|---|---|---|---|---|---|---|---|
Pseudo first order | Pseudo second order | |||||||
Adsorbate | K1 (min−1) | qexp (mg/g) | qecal (mg/g) | R2 | K2 (g mg−1mi−1) | qexp (mg/g) | qecal (mg/g) | R2 |
Cd2+ | 0.025 | 0.01857 | 0.0051 | 0.9897 | 8.16 | 0.01857 | 0.02 | 0.994 |
Pb2+ | 0.125 | 0.018026 | 0.0294 | -0.998 | 6.99 | 0.018026 | 0.02 | 0.997 |
Cr3+ | 0.054 | 0.018757 | 0.0176 | 0.923 | 3.54 | 0.018757 | 0.021 | 0.995 |