Author/Authors :
Mehrabani Ardekani، Mohammad Mehdi نويسنده Msc of Environment Engineering Head of Health, Safety & Environment Office Fars Industrial Estates Co. Mehrabani Ardekani, Mohammad Mehdi , Rezaei Kalantary، Roshanak نويسنده Department of Environmental Health, School of Health, Tehran University of Medical Sciences, Tehran, Iran. Rezaei Kalantary, Roshanak , Jorfi، Sahand نويسنده Ph.D student of Environmental health Engineering, Tarbiat Modares University, Tehran, Iran. Jorfi, Sahand , Nurisepehr، Mohammad نويسنده Department of Environmental Health Engineering, Alborz University of Medical Sciences, Karaj, Iran. Nurisepehr, Mohammad
Abstract :
Fluoride is used widely in industries such as manufacture of semi-conductors, power plants, glass production and etc and released to the environment via their effluents. The purpose of this sturdy was to compare the efficiency of low price adsorbents in fluoride removal from water. The optimum values of pH, contact time and adsorbent dosage were determined and different concentrations of fluoride were experimented in lab scale conditions for bagas, modified bagas and chitosan. Then Langmuir and Freundlich contacts were also determined based on optimum conditions. The pH value of 7, contact time of 60 min and adsorbent dose of 2 g/L were determined as optimum conditions for all three adsorbents. The most fluoride removal efficiency of 91% was obtained for modified bagas in optimum conditions. Based on data obtained in this study, it can be concluded that adsorption by modified bagas is an efficient and reliable method for fluoride removal from liquid solutions.
