Table 4 Isotherm parameters and their correlation coefficient (R2) for the adsorption of Cu(II) onto \(\:\text{P}\text{m}\text{A}\text{P}/\text{A}\text{P}\text{T}\text{E}\text{S}{/\text{G}\text{O}}_{\left(6.6\right)}\)
T (K) | Langmuir isotherm | Freundlich isotherm | D-R isotherm | ||||||
|---|---|---|---|---|---|---|---|---|---|
qmax (mg/g) | KL (L/mg) | R2 | KF (mg/g) | 1/n | R2 | qm (mg/g) | E (kJ/mol) | R2 | |
Linear form | |||||||||
298 | 227.3 | 0.288 | 0.998 | 167.0 | 0.054 | 0.983 | 214.0 | 26.73 | 0.924 |
303 | 256.4 | 0.394 | 0.999 | 177.7 | 0.072 | 0.991 | 243.6 | 31.62 | 0.924 |
308 | 294.1 | 0.420 | 0.998 | 185.2 | 0.096 | 0.994 | 276.7 | 22.36 | 0.969 |
313 | 322.6 | 0.373 | 0.998 | 191.6 | 0.106 | 0.993 | 293.5 | 22.36 | 0.957 |
Non-linear form | |||||||||
293 | 227.3 | 0.195 | 0.995 | 143.3 | 0.087 | 0.999 | |||
303 | 264.7 | 0.175 | 0.998 | 177.5 | 0.072 | 0.980 | |||
308 | 296.8 | 0.267 | 0.999 | 207.5 | 0.069 | 0.999 | |||
313 | 324.5 | 0.209 | 0.998 | 193.8 | 0.103 | 0.986 | |||
