Table 1 Adsorption isotherms and kinetic models constants and the corresponding error functions.
Isotherm model | Parameters | Value | Kinetic model | Parameters | Value |
|---|---|---|---|---|---|
Langmuir non-linear | KL (L mg−1) | 0.016 ± 0.002 | Pseudo-first order non-linear | k1 (min−1) | 0.29 ± 0,03 |
qmax (mg g−1) | 186.2 ± 13.3 | qe,calc (mg g−1) | 40.84 ± 0.32 | ||
R2 | 0.9972 | R2 | 0.9988 | ||
χ2 | 0.18 | χ2 | 0.04 | ||
SSE | 9.58 | SSE | 1.25 | ||
ARE (%) | 2.40 | ARE (%) | 17.68 | ||
Langmuir linear | KL (L mg−1) | 0.016 ± 0.003 | Pseudo-first order linear | k1 (min−1) | 0.15 ± 0,04 |
qmax (mg g−1) | 188.2 ± 7.4 | qe,calc (mg g−1) | 27.80 ± 2.11 | ||
R2 | 0.9986 | R2 | 0.9693 | ||
χ2 | 6.46 × 10–5 | χ2 | 0.13 | ||
SSE | 1.24 × 10–6 | SSE | 0.24 | ||
ARE (%) | 1.03 | ARE (%) | 31.95 | ||
Freundlich non-linear | Kf (mg g−1) | 6.30 ± 1.35 | Pseudo-second order non-linear | k2 (g mg−1 min−1) | 0.026 ± 0.004 |
1/n | 0.662 | qe,calc (mg g−1) | 42.13 ± 0.27 | ||
R2 | 0.9863 | R2 | 0.9997 | ||
χ2 | 1.04 | χ2 | 0.01 | ||
SSE | 48.15 | SSE | 0.38 | ||
ARE (%) | 6.39 | ARE (%) | 17.13 | ||
Freundlich linear | Kf (mg g−1) | 4.85 ± 1.05 | Pseudo-second order linear | k2 (g mg−1 min−1) | 0.022 ± 0.003 |
1/n | 0.735 ± 0.048 | qe,calc (mg g−1) | 42.43 ± 0.35 | ||
R2 | 0.9893 | R2 | 0.9998 | ||
χ2 | 1.61 × 10–3 | χ2 | 1.24 × 10–4 | ||
SSE | 2.84 × 10–3 | SSE | 5.69 × 10–5 | ||
ARE (%) | 1.16 | ARE (%) | 0.59 |
