Fluoride pollution of water has become a problem due to leach out from several minerals by rainwater and due to human activities through different industrial applications. Among the several methods for the removal of fluoride from water the adsorption is one effective technique. In the present study dried algal biomass of Sargassum (a type of marine algae) was used to biosorption of fluoride from synthetic solutions. The effect of various parameters such as initial fluoride concentration, biosorbent dose, contact time, and pH on efficiency of adsorption process was investigated. It was found that the biosorbent adsorbs fluoride effectively. The adsorption efficiency was dependent on initial fluoride concentration and biosorbent dose and adsorption isotherm followed Langmuir isotherm adsorption model. Results showed that the aqueous phase pH significantly affected on adsorption process efficiency and optimum pH for fluoride sorption was acidic pH. The findings of presented work showed the applicability of Sargassum algal biomass as an inexpensive adsorbent which has an enormous potential of biosorption in fluoride removal from aqueous solutions.

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