Research Article
Removal of Hexavalent Chromium by Using Sustainable Green Materials as Low-Cost Adsorbents
Table 8
Thermodynamic parameters for Cr(VI) adsorption onto tea residues.
| | Adsorbents | (kJ mol-1) | (J mol-1 K-1) | (kJ mol-1) | | 298 K | 308 K | 323 K | 338 K | 353 K |
| | Green tea residue | 7.62 | 27.22 | -0.49 | -0.76 | -1.17 | -1.58 | -1.99 | | Pu-erh residue | 4.39 | 157.17 | -2.97 | -4.55 | -6.9 | -9.26 | -11.62 | | Tieguanyin residue | 36.3 | 128.19 | -1.9 | -3.18 | -5.1 | -7.03 | -8.95 |
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