Removal Of Fluoride Using Polyaniline Modified Pumice From Aqueous Solutions

Abstract

Fluoride is among the most common ground water contaminants that can cause human health impact when it is found above the permissible limit. Therefore, in this study, polyaniline modified natural pumice was used for fluoride removal. Adsorption influencing parameters including pH, contact time, dose of adsorbents were optimized. The residual fluoride after adsorption was analyzed through back titration method. Results of the study revealed that 14 mg/g maximum adsorption capacity was obtained using polyaniline modified pumice at optimal conditions of solution pH 2.0, contact time 1h, adsorbent dose of 4 g/L. It was found that fluoride sorption kinetic was fitted to pseudo-second-order model. Polyaniline modified pumice was found to be an alternative adsorbent for the removal of fluoride from water.