Optimization Study of Defluoridation from Water Using Seashell Powder

World wide it has been observed that higher fluoride concentration in water can lead endemic diseases. In many parts of rural area, the ground water is the main source of drinking water. In the present study main objective of is to check feasibility of removal of fluoride from groundwater by solid waste adsorbents Seashell powder (SSP). The raw material were collected and physicochemical characterization of the adsorbent has been done by using standard methods e.g. sieving, proximate analysis, pHpzc, SEM, XRD. Different dose of adsorbent were used ranging from 0.5 to 5.5 gm/L of fluoride aqueous solution. Equilibrium sorption studies were conducted at room temperature (i.e 30 degrees C) with varying fluoride concentrations (2 to 16 mg/L). Sorption experiments were also carried out at various pH (2-14) to understand the effect of pH on removal was studied for 15-1440 minute. The temperature range for the study was taken from 293K to 313K. All the batch study was performed at the orbital shaking incubator. The optimum dose & equilibrium time was found 4mg/L & 480 min respectively. Various kinetic models and equilibrium study is done have been study for the present work to investigate the adsorption process of fluoride onto SSP. The value of thermodynamic parameter Delta H indicated an exothermic adsorption process and the negative value of Delta G show the feasibility and spontaneity of material-anion interaction.