Abstract
Contamination of drinking water due to fluoride is a severe health hazard problem. Excess of fluoride (>1.5 mg/L) in drinking water is harmful to the human health. Various treatment technologies for removing fluoride from ground water have been investigated in the past. Present investigation aims to remove fluoride by perchloric acid cross-linked calcium alginate (PCA). Column flow adsorption data were utilized to obtain breakthrough curves and desorption experiment have been carried out with a view to recover the adsorbed fluoride and regenerate the PCA beads using 0.05 M EDTA. Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM) studies were used for the characterization of the adsorbent.
Highlights
It is well documented that trace elements are essential and beneficial to human health in minute concentrations, as they play a significant role in many metabolic processes and act as cofactors
The results indicate that the column gets saturated early and the adsorption capacity decreases slightly
It is demonstrates that a perchloric acid cross-linked calcium alginate (PCA) was developed by cross-linking perchloric acid on to calcium alginate sorbent could be used successfully for the removal of fluoride from water
Summary
It is well documented that trace elements are essential and beneficial to human health in minute concentrations, as they play a significant role in many metabolic processes and act as cofactors. Adsorption involves the passage of contaminated water through an adsorbent bed, where fluoride removed by physical, ion-exchange or surface chemical reaction with adsorbent[5]. The scope and objective of this defluoridation study was to investigate the fluoride adsorption capacity of PCA beads by pursuing the column flow adsorption experimental conditions and to study the desorption (recovery) process.
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