Экологическая и аналитическая токсикология

Removal of Fluoride from Drinking Water Using Fly Ash after Pre Treatment

Abstract

Ranjeeta S

The adsorption capacity of fly ash is much higher than the other adsorbents. The Fly ash was an effective adsorbent especially at high concentration of fluoride. This may be because of the presence of unburnt carbon particles in the fly ash which are known to be very efficient adsorbing materials. The main components of fly ash are silica, alumina, iron oxides, calcium oxide and residual carbon. The presence of unburnt carbon and surface area of ash make it a good candidate for utilization as an inexpensive adsorbent. In this method we use fly ash, generate from Chula. The 100 gm ash is mixed with 1 liter fluoridated water and stirs 45 to 60 minutes then leave it for settle down. After 2 hour this solution filters with G-3 crucible in a filtration unit. The fluoride was analyzed by using ions selective electrode method. This method removes fluoride satisfactory from drinking water but also increases some other parameters of water like alkalinity, chloride, TDS, nitrates etc.so after the view of side effects pre treatment of fly ash have been done with distilled water. The results were found very much satisfactory.