Table 2 Parameters for various adsorption kinetic models for Cd(II), Co(II), Zn(II) and Pb(II) sorption on MBC2
From: Investigations of Heavy Metal Ion Sorption Using Nanocomposites of Iron-Modified Biochar
Parameters | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
C 0 [mg/dm3] | q exp | PFO | PSO | IPD | |||||||
\( \log \left({\mathit{\mathsf{q}}}_{{}_{\mathsf{1}}}-{\mathit{\mathsf{q}}}_{{}_{\mathit{\mathsf{t}}}}\right)= \log \left({\mathit{\mathsf{q}}}_{{}_{\mathsf{1}}}\right)-\frac{\mathit{\mathsf{k}}{}_{{}_{\mathsf{1}}}\mathit{\mathsf{t}}}{\mathsf{2.303}} \) | \( \frac{\mathit{\mathsf{t}}}{{\mathit{\mathsf{q}}}_{\mathit{\mathsf{t}}}}=\frac{\mathsf{1}}{{\mathit{\mathsf{k}}}_{\mathsf{2}}{\mathit{\mathsf{q}}}_{\mathsf{2}}^{\mathsf{2}}}+\frac{\mathit{\mathsf{t}}}{{\mathit{\mathsf{q}}}_{\mathsf{2}}} \) | \( {\mathit{\mathsf{q}}}_{\mathit{\mathsf{t}}}={\mathit{\mathsf{k}}}_{\mathit{\mathsf{i}}}{\mathit{\mathsf{t}}}^{\mathsf{1}/\mathsf{2}}+\mathit{\mathsf{C}} \) | |||||||||
q 1 | k 1 | R 2 | q 2 | k 2 | h | R 2 | k i | C | R 2 | ||
Cd(II) | |||||||||||
50 | 8.41 | 0.54 | 0.019 | 0.914 | 8.42 | 0.227 | 16.087 | 1.000 | 0.224 | 7.188 | 0.897 |
100 | 15.63 | 4.42 | 0.013 | 0.978 | 15.67 | 0.016 | 3.846 | 0.999 | 0.756 | 9.385 | 0.933 |
150 | 22.63 | 10.41 | 0.018 | 0.968 | 23.02 | 0.006 | 3.189 | 0.998 | 1.472 | 9.698 | 0.960 |
200 | 23.55 | 8.20 | 0.011 | 0.964 | 23.59 | 0.006 | 4.072 | 0.999 | 1.076 | 12.664 | 0.893 |
Zn(II) | |||||||||||
50 | 8.82 | 0.24 | 0.025 | 0.913 | 8.83 | 0.658 | 51.259 | 1.000 | 0.187 | 8.007 | 0.789 |
100 | 16.85 | 3.53 | 0.012 | 0.965 | 16.87 | 0.020 | 5.820 | 1.000 | 0.449 | 12.168 | 0.914 |
150 | 20.57 | 6.40 | 0.008 | 0.963 | 20.40 | 0.008 | 3.124 | 0.997 | 0.613 | 12.870 | 0.888 |
200 | 27.93 | 8.20 | 0.012 | 0.971 | 27.99 | 0.007 | 5.546 | 0.999 | 0.891 | 17.933 | 0.967 |
Co(II) | |||||||||||
50 | 8.12 | 1.68 | 0.016 | 0.938 | 8.15 | 0.055 | 3.675 | 1.000 | 0.452 | 5.113 | 0.981 |
100 | 12.84 | 6.40 | 0.010 | 0.940 | 12.82 | 0.007 | 1.187 | 0.994 | 0.621 | 5.207 | 0.847 |
150 | 15.24 | 7.99 | 0.011 | 0.991 | 15.36 | 0.005 | 1.292 | 0.995 | 0.387 | 6.984 | 0.974 |
200 | 18.30 | 8.72 | 0.007 | 0.917 | 17.96 | 0.005 | 1.525 | 0.992 | 0.370 | 8.150 | 0.965 |
Pb(II) | |||||||||||
50 | 8.74 | 0.02 | 0.004 | 0.656 | 8.73 | 2.335 | 178.025 | 1.000 | 0.003 | 8.704 | 0.982 |
100 | 16.93 | 0.01 | 0.007 | 0.705 | 16.93 | 5.530 | 158.227 | 1.000 | 0.003 | 16.905 | 0.666 |
150 | 23.75 | 0.04 | 0.008 | 0.920 | 23.74 | 1214 | 684.238 | 1.000 | 0.003 | 23.698 | 0.982 |
200 | 33.19 | 0.08 | 0.020 | 0.711 | 33.19 | 1.822 | 200.745 | 1.000 | 0.159 | 32.586 | 0.635 |