DETERMINATION OF COLUMN PERFORMANCE OF FLUORIDE ADSORPTION BY DIFFERENT ADSORBENT IN A FIXED-BED

摘要

Main source of fluoride for people is generally food and drinking water. For this reason, fluoride concentrations in drinking water samples are estimated. In our studies synthetic water was used to give required concentration of fluoride. For the purification of synthetic water containing fluoride adsorption technique was adopted using Sago, Molecular sieves, Alumina, Silica- gel, Activated Charcoal and Keisulgher earth (soil) doping system. Determination of fluoride was done using SPADANS photometric method. The fluoride removal was investigated as a function of the fluoride concentration, flow rate and amount of adsorbent dose. Percentage fluoride removal as function of time and uptake capacity related to flow volume was determined by evaluating the breakthrough curves. It was found that Silica gel, Activated charcoal and Keisulghur earth were found to be the best adsorbent for fluoride removal. The result obtained confirmed that fluoride removal was observed at lower flow rate and lower concentration.