Parameters obtained from the non-linear equations for the NIPC and MIPC polymers.
Polymer | NIPC | MIPC | |||||||
---|---|---|---|---|---|---|---|---|---|
Model | Parameters | Temperature (K) | |||||||
288.15 | 298.15 | 308.15 | 318.15 | 288.15 | 298.15 | 308.15 | 318.15 | ||
q exp (mg g−1) | 7.86 | 11.88 | 11.46 | 13.69 | 16.99 | 22.43 | 24.10 | 21.73 | |
Freundlich | K f (mg g−1) (L g−1)1/n | 1.01 | 0.70 | 1.11 | 1.48 | 1.44 | 1.08 | 1.91 | 2.00 |
n (L mg−1) | 1.98 | 1.37 | 1.69 | 1.70 | 1.50 | 1.15 | 1.32 | 1.45 | |
X 2 | 0.42 | 1.02 | 1.59 | 2.30 | 1.91 | 2.03 | 7.34 | 4.45 | |
Adj. R2 | 0.91 | 0.92 | 0.86 | 0.87 | 0.93 | 0.95 | 0.87 | 0.90 | |
R 2 | 0.95 | 0.96 | 0.93 | 0.94 | 0.96 | 0.98 | 0.94 | 0.95 | |
RMSE | 0.64 | 1.01 | 1.26 | 1.51 | 1.38 | 1.42 | 2.70 | 2.11 | |
Langmuir | Q max (mg g−1) | 10.90 | 27.51 | 18.34 | 22.62 | 32.48 | 44.79 | 29.78 | 44.25 |
b (L mg−1) | 0.01 | 0.02 | 0.03 | 0.04 | 0.01 | 0.01 | 0.02 | 0.02 | |
X 2 | 0.15 | 0.61 | 0.92 | 1.23 | 0.93 | 1.04 | 5.35 | 2.62 | |
Adj. R2 | 0.96 | 0.95 | 0.92 | 0.93 | 0.96 | 0.96 | 0.90 | 0.94 | |
R 2 | 0.98 | 0.98 | 0.96 | 0.96 | 0.98 | 0.98 | 0.95 | 0.97 | |
RMSE | 0.39 | 0.78 | 0.96 | 1.11 | 0.96 | 1.20 | 2.31 | 1.61 | |
Sips | Q max (mg g−1) | 8.16 | 13.53 | 11.0 | 14.00 | 19.34 | 28.46 | 24.77 | 23.12 |
b (L mg−1) | 0.06 | 0.04 | 0.07 | 0.07 | 0.06 | 0.05 | 0.09 | 0.08 | |
n | 0.57 | 0.46 | 0.36 | 0.41 | 0.56 | 0.53 | 0.33 | 0.43 | |
X 2 | 0.05 | 0.05 | 0.10 | 0.16 | 0.18 | 0.20 | 0.13 | 0.18 | |
Adj. R2 | 0.98 | 0.99 | 0.99 | 0.99 | 0.99 | 0.99 | 0.99 | 0.99 | |
R 2 | 0.99 | 0.99 | 0.99 | 0.99 | 0.99 | 0.99 | 0.99 | 0.99 | |
RMSE | 0.23 | 0.23 | 0.32 | 0.40 | 0.43 | 0.45 | 0.37 | 0.43 | |
Temkin | b T (kJ mol−1) | 0.98 | 0.53 | 0.61 | 0.50 | 0.35 | 0.25 | 0.23 | 0.29 |
A T (L mg−1) | 0.39 | 0.23 | 0.27 | 0.30 | 0.29 | 0.25 | 0.30 | 0.33 | |
X 2 | 0.15 | 0.92 | 0.66 | 0.78 | 0.28 | 1.60 | 3.57 | 1.62 | |
Adj. R2 | 0.96 | 0.93 | 0.94 | 0.95 | 0.98 | 0.96 | 0.93 | 0.96 | |
R 2 | 0.97 | 0.97 | 0.97 | 0.98 | 0.99 | 0.98 | 0.97 | 0.98 | |
RMSE | 0.38 | 0.96 | 0.81 | 0.83 | 0.53 | 1.26 | 1.89 | 1.27 |