Freundlich isotherm parameters of phenol compound adsorption onto the studied materials.
| Adsorbent materials | 2,6-Dimethylphenol | 4,4′-Dihydroxybiphenyl | ||||||
|---|---|---|---|---|---|---|---|---|
| q m, exp, mg g−1 | 1/n | K F, mg g−1 | R 2 | q m, exp, mg g−1 | 1/n | K F, mg g−1 | R 2 | |
| CuHEDP | 1.29 | 0.6368 | 0.084 | 0.9048 | 2.09 | 0.8453 | 0.0996 | 0.9980 |
| + [BMIM][OTF] | 3.69 | 0.4284 | 0.57 | 0.9379 | 3.09 | 0.8362 | 0.158 | 0.9948 |
| + [BMIM][NO3] | 4.20 | 0.3276 | 1.013 | 0.9633 | 3.90 | 0.5359 | 0.625 | 0.9586 |
| + [BMIM][Cl] | 4.88 | 0.2632 | 1.56 | 0.9518 | 4.07 | 0.4385 | 0.919 | 0.9332 |
| + [HMIM][Cl] | 5.28 | 0.2478 | 1.803 | 0.9524 | 4.17 | 0.3580 | 1.27 | 0.8628 |
| NiHEDP | 4.88 | 0.4102 | 0.797 | 0.9803 | 2.47 | 0.829 | 0.129 | 0.9944 |
| + [BMIM][OTF] | 7.87 | 0.4347 | 1.23 | 0.9566 | 3.27 | 0.6996 | 0.277 | 0.9893 |
| + [BMIM][NO3] | 9.72 | 0.4055 | 1.74 | 0.9542 | 4.13 | 0.4961 | 0.759 | 0.9621 |
| + [BMIM][Cl] | 12.59 | 0.43 | 2.05 | 0.9619 | 4.53 | 0.4001 | 1.15 | 0.9778 |
| + [HMIM][Cl] | 13.29 | 0.3983 | 2.49 | 0.9557 | 5.00 | 0.3975 | 1.33 | 0.9251 |
| CoHEDP | 6.57 | 0.1504 | 3.39 | 0.9898 | 3.78 | 0.5178 | 0.645 | 0.9399 |
| + [BMIM][OTF] | 10.2 | 0.2398 | 3.66 | 0.9737 | 4.37 | 0.5258 | 0.746 | 0.9255 |
| + [BMIM][NO3] | 14.3 | 0.3162 | 3.73 | 0.9709 | 5.33 | 0.4267 | 1.26 | 0.9568 |
| + [BMIM][Cl] | 16.1 | 0.3305 | 4.16 | 0.9459 | 7.10 | 0.3796 | 2.05 | 0.9468 |
| + [HMIM][Cl] | 16.9 | 0.3182 | 4.59 | 0.9556 | 8.00 | 0.3452 | 2.64 | 0.9291 |
| CeHEDP | 12.1 | 0.456 | 1.67 | 0.9782 | 3.80 | 0.4569 | 0.789 | 0.9364 |
| + [BMIM][OTF] | 16.6 | 0.2946 | 4.84 | 0.9669 | 5.40 | 0.4264 | 1.28 | 0.9593 |
| + [BMIM][NO3] | 18.06 | 0.2552 | 6.14 | 0.9768 | 6.23 | 0.3084 | 2.21 | 0.9603 |
| + [BMIM][Cl] | 21.7 | 0.2139 | 9.23 | 0.9597 | 7.40 | 0.3548 | 2.41 | 0.8954 |
| + [HMIM][Cl] | 23.1 | 0.1859 | 10.9 | 0.9663 | 9.13 | 0.4261 | 2.33 | 0.9446 |