Research Article
Magnetite Functionalized Nigella Sativa Seeds for the Uptake of Chromium(VI) and Lead(II) Ions from Synthetic Wastewater
Table 4
Thermodynamic studies and their parameters.
| | Parameter | FNS | PNS | | Pb(II) | Cr(VI) | Pb(II) | Cr(VI) |
| | (KJ mol-1) | 8x10-4 | 7x10-4 | 1x10-3 | 1x10-3 | | (KJ mol-1 K-1) | 3x10-3 | 1x10-3 | 3x10-3 | 2x10-3 | | (KJ mol-1) | | | | | | 298 K | -1.70 | -4.66 | -1.43 | -1.19 | | 303 K | -5.02 | -4.76 | -3.28 | -1.26 | | 313 K | -5.96 | -4.92 | -4.17 | -1.36 | | 333 K | -6.18 | -5.78 | -5.84 | -1.67 | | 353 K | -7.06 | -5.07 | -7.99 | -1.44 |
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