Research Article
Magnetite Functionalized Nigella Sativa Seeds for the Uptake of Chromium(VI) and Lead(II) Ions from Synthetic Wastewater
Table 3
Kinetic models and their parameters.
| Models | FNS | PNS | Pb(II) | Cr(VI) | Pb(II) | Cr(VI) |
| PFO | (mgg-1) | 35.20 | 8.64 | 30.98 | 14.15 | (m-1) | 0.10 | 0.17 | 0.07 | 0.96 | | 0.9979 | 0.9938 | 0.9947 | 0.9976 | PSO | (mgg-1) | 33.24 | 18.32 | 23.71 | 20.67 | (gmg−1 min−1) | 0.0377 | 0.1370 | 0.0419 | 0.0743 | | 0.9024 | 0.8481 | 0.7415 | 0.8969 | IPD | | 15.48 | 4.11 | 13.09 | 9.06 | (g g-1 min0.5) | 1.7716 | 0.4202 | 2.3475 | 0.6298 | | 0.917 | 0.719 | 0.941 | 0.876 | EPA | % | 59.00 | 53.92 | 62.98 | 42.48 | ESA | % | 41.00 | 46.08 | 37.02 | 57.52 | Experimental () (mgg-1) | 37.76 | 8.92 | 35.36 | 15.75 |
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EPA: estimated pore sorption; ESA: estimated surface sorption.
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