Efficient removal of toxic phosphate anions from aqueousenvironment using pectin based quaternary amino anion exchanger
Khan, exchangerMu. Naushada,∗, Gaurav Sharmab,∗, Amit Kumarb, Shweta Sharmab, Ayman A. Ghfara,Amit Bhatnagarc, Florian J. Stadler, Mohammad R. . 2018
Pectin based quaternary amino anion exchanger (Pc-QAE) was prepared using simple crosslinking poly-merization method. This anion exchanger was characterized by X-ray diffraction (XRD), scanning electronmicroscopy (SEM) and Fourier transform infrared spectroscopy (FTIR). Pc-QAE was applied for theremoval of phosphate anion from the aqueous solution. The adsorption process which was pH dependentshowed maximum adsorption of phosphate anions at pH 7. Pc-QAE showed good monolayer adsorptioncapacity for phosphate anions which demonstrated its good capability towards Langmuir isotherm model.Moreover, the adsorption was evaluated thermodynamically and the negative value of Gibbs free energy(−1.791 KJ/mol) revealed the spontaneity of adsorption process. The value of H◦and S◦were found tobe 15.28 and 49.48 KJ/mol, respectively representing the endothermic nature and enhancement in degreeof freedom due to the adsorption process.
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