Table 3
Summary of isotherm model equations and parameters.
| Isotherm model | Equation | Model fitting parameters | Values | AIC |
|---|---|---|---|---|
| Langmuir |
|
qm, b | qm& =& 37.8& mg/g | 55.2 |
| b = 0.027& L/g | ||||
| Langmuir-Freundlich |
|
qm, b, n | qm& = 837& mg/g | 37.9 |
| b = 1.06E-11& (L/mg)n | ||||
| n = 2.77 | ||||
| Jovanovic |
|
qm, aj, bj | qm& =& 82.5& mg/g | 38.6 |
| aj= 7.6E-06& L/mg | ||||
| bj& =& 0.0009& L/mg | ||||
| Fritz-Schlunder |
|
α1, α2, β1, β2 | α1& =& 2E-07& (mg(1& −& β1)Lβ1)/g | 48.8 |
| α2 = 43625.5& (L/mg)β2 | ||||
| β1 = 3.71 | ||||
| β2 = 0.0001 | ||||
| Freundlich | q& =& kF C n | kf, n | kf& =& 0.0015& ((mg/g)(L/mg)n) | 28.7 |
| n = 0.8 | ||||
| Li |
|
 ,  ,  , 
|
kL = 6.513& (mmol/g) | 77.1 |
| b0& =& 0.014 | ||||
|
M0& =& 0.332 | |||
| bL& =& 0.015& (L/mmol) | ||||
| Two-step Langmuir |
|
 , , , ,
|
 = 43.56 |
100.5 |
 = 6.1E-06 |
||||
 = 2.86E+04& (meq/g) |
||||
 = 5.04E-07& (L/meq) |
||||
 = 667.5& (meq/L) |