Adsorption of Acid Red 1 onto Functionalized Silica by Amine-Terminated Dendritic Polymers: Isotherms and Kinetic Models
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Pristine silica was functionalized by amine-terminated dendritic polymers via divergent synthetic routes in first generation. The chemical structure analyzed by Fourier Transform Infrared Spectroscopy (FTIR) confirmed the presence of amine terminated group on silica. The pristine and functionalized silica were investigated for adsorption capacity of acid red 1 (AR1). The results showed that the removal was enhanced from 0% to 94.8% by functionalization. It seems that this modification improved significantly the adsorption capacity of this adsorbent. Moreover, their adsorption isotherms and kinetics were further investigated to explore the application in the industrial operating system. The adsorption kinetics fitted pseudo-second order model well. Furthermore, the adsorption isotherms fitted the Freundlich model well and with the modification of pristine silica, R2 of this model was 0/98.
KeywordsSilica Amine terminated group Adsorption Isotherm Kinetic
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