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.
