Abstract :
[en] Fluoride is a global water contaminant of geogenic nature impacting human health. Encapsulation of active blue-green algae, Phormidium sp. as biosorbent provides a unique type of biosorbent that continuously develops new active sites for biosorption and can be separated easily from treated water. The experiment was conducted in batch mode with varying parameters — initial pH (3.5–4.5 after an initial screening of wide range pH), initial fluoride concentration (2.0–10.0 mg/L), and different biomass amounts 3.0–6.0 g (biosorbent dose). The parameters mentioned above were considered and optimized using response surface methodology (RSM). Additionally, the biosorption study assures 60% removal from 3.0 mg/L of initial fluoride concentration. Furthermore, the process was found to follow the Freundlich isotherm model. The study follows first-order kinetics; further, the intra-particle diffusion and surface biosorption both contribute to the rate-determining step. In addition to that, scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FTIR) results also confirmed the contribution of algal biomass towards fluoride removal.
Scopus citations®
without self-citations
23