Research Article
Aminopropyl Functionalised MCM-41: Synthesis and Application for Adsorption of Pb(II) and Cd(II)
Table 5
Results of the paired-samples t-test analysis of adsorption of Pb(II) and Cd(II) on aminopropyl-MCM-41.
| For adsorption of Pb(II) | For adsorption of Cd(II) | Isotherm | | | Isotherm | | |
| Langmuir (nonlinear) | 0.001 | 1.000 | Redlich–Peterson (nonlinear) | 0.001 | 1.000 | Freundlich (nonlinear) | 0.001 | 1.000 | Sips (nonlinear) | 0.001 | 1.000 | Redlich–Peterson (nonlinear) | −0.014 | 0.989 | Langmuir (nonlinear) | 0.002 | 0.999 | Sips (nonlinear) | −0.014 | 0.989 | Freundlich (nonlinear) | −0.007 | 0.994 | Langmuir 3 | 0.013 | 0.989 | Langmuir 3 | 0.095 | 0.925 | Langmuir 5 | 0.061 | 0.952 | Redlich–Peterson (linear) | 0.101 | 0.920 | Langmuir 4 | −0.139 | 0.891 | Langmuir 5 | −0.221 | 0.827 | Redlich–Peterson (linear) | −0.848 | 0.404 | Freundlich (linear) | 0.299 | 0.767 | Freundlich (linear) | 0.896 | 0.379 | Langmuir 4 | −0.463 | 0.647 | Langmuir 1 | −15.632 | <0.001 | Sips (linear) | −0.781 | 0.442 | Langmuir 2 | −15.921 | <0.001 | Langmuir 1 | −1.179 | 0.249 | Sips (linear) | −13.671 | <0.001 | Langmuir 2 | −1.641 | 0.113 |
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