Table 3. Adsorption Isotherms and Kinetics Parameters.
| temperature
(K) |
||||
|---|---|---|---|---|
| models parameters | 293 | 303 | 313 | 323 |
| Hg(II) | ||||
| Langmuir | ||||
| qmax (mg g–1)/pHi/C0 (ppm) | 164.07/7/5–40 | 166.46/7/5–40 | 168.69/7/5–40 | 170.38/7/5–40 |
| kL (L mg–1) | 0.1361 | 0.1526 | 0.1853 | 0.2449 |
| R2/F | 0.9978/4757.39 | 0.9976/4335.80 | 0.9969/3311.08 | 0.9978/4639.16 |
| Pseudosecond Order | ||||
| qe,cal (mg g–1)/pHi/C0 (ppm) | 109.99/7/30 | 105.59/7/30 | 102.14/7/30 | 98.88/7/30 |
| qe,exp (mg g–1) | 110.26 ± 3.19 | 105.61 ± 3.27 | 101.32 ± 3.14 | 97.80 ± 3.03 |
| k2 (g mg–1 min–1) | 6.34 × 10–4 | 8.97 × 10–4 | 11.20 × 10–4 | 14.90 × 10–4 |
| R2/F | 0.9965/25 886.66 | 0.9993/135 522.05 | 0.9989/93 372.13 | 0.9983/64 517.33 |
| SF | ||||
| Langmuir | ||||
| qmax (mg g–1)/pHi/C0 (ppm) | 280.17/10/5–40 | 303.61/10/5–40 | 341.50/10/5–40 | 348.36/10/5–40 |
| kL (L mg–1) | 0.2172 | 0.2652 | 0.2945 | 0.3186 |
| R2/F | 0.9997/26 181.19 | 0.9996/21 697.13 | 0.9982/4781.31 | 0.9994/13 382.38 |
| Pseudosecond Order | ||||
| qe,cal (mg g–1)/pHi/C0 (ppm) | 186.09/10/40 | 184.33/10/40 | 183.35/10/40 | 188.21/10/40 |
| qe,exp (mg g–1) | 173.72 ± 5.21 | 177.30 ± 5.32 | 180.30 ± 5.41 | 182.37 ± 5.47 |
| k2 (g mg–1 min–1) | 1.63 × 10–5 | 2.45 × 10–5 | 3.26 × 10–5 | 4.30 × 10–5 |
| R2/F | 0.9949/11 060.96 | 0.9906/6752.93 | 0.9928/10 330.26 | 0.9877/7193.79 |
| BCB | ||||
| BET | ||||
| qBET (mg g–1)/pHi/C0 (ppm) | 64.66/9/5–40 | 46.14/9/5–40 | 35.22/9/5–40 | 30.10/9/5–40 |
| k1 (L mg–1)/k2 (L mg–1) | 4.6345/0.1795 | 4.7357/0.1879 | 5.0474/0.1816 | 3.7230/0.1664 |
| R2/F | 0.9897/545.11 | 0.9906/588.00 | 0.9943/946.63 | 0.9930/752.02 |
| Pseudosecond Order | ||||
| qe,cal (mg g–1)/pHi/C0 (ppm) | 190.10/9/40 | 183.41/9/30 | 175.69/9/30 | 169.69/9/30 |
| qe,exp (mg g–1) | 182.27 ± 5.47 | 180.40 ± 5.41 | 177.98 ± 5.34 | 174.99 ± 5.25 |
| k2 (g mg–1 min–1) | 9.77 × 10–5 | 1.31 × 10–4 | 1.75 × 10–4 | 2.30 × 10–4 |
| R2/F | 0.9891/4938.66 | 0.9854/4321.51 | 0.9740/2843.80 | 0.9737/3208.94 |