Adsorption of Pb(II) ion using pectin membrane

Abstract

Disposal of heavy metal ion into body waters may result in the disruption of aquatic biota ecosystem, thus needs to be overcome. In this study, a cellulose-based adsorbent membranes was developed as adsorbents of Pb ion. The membrane was prepared by mixing chitosan gel in 2,5% acetic acid solution with pectin gel in water for 3 h. The solution then was printed out into a polypropylene container and dried. The membrane characterization was performed using FTIR for functional groups identification, and XRD and SEM for physical characteristic analysis. The results showed the stability and resistance of the pectin membrane in acidic environment. FTIR data confirmed main functional groups that participated in the adsorption process included carboxyl and hydrogen. The XRD data show that the adsorbent has an amorf phase. Furthermore, a solid structure of the adsorbent was showed by SEM data. Adsorption of pectin membranes to Pb (II) ions reaches a maximum at pH 4, an optimum time of 60 min with an adsorption capacity of 92.68% and 92%, respectively. Furthermore, the pectin membrane in adsorbing Pb (II) ions follows the Freundlich isotherm.