A COMPARATIVE STUDY OF DIFFERENT BIOADSORBENTS OBTAINED FROM DOMESTIC WASTE MATERIAL FOR THE FLUORIDE REMOVALPALLAVI MISHRA AND SHIPRA SINGH
Excess of fluoride is found in many parts of Western Rajasthan and its concentration levels are reported as high as 15-22 ppm in many areas specially areas surrounding Jodhpur. This is causing a lot of health problems to the people living in the area, therefore our main aim was to find out suitable bioadsorbents which are cheap, effective and easily available for the fluoride removal from water. Among various techniques, adsorption technique has found attention by many researchers due to its high efficiency as well as economic consideration. In developing countries like India plant materials & agricultural wastes are readily available in the households, they are low cost, biodegradable and natural materials. We have used biochar of various peels and leaves obtained from the domestic wastes and trees for the removal of fluoride. The main factors which influenced the adsorption capacity were adsorbent dosage, pH, size, temperature and contact time.The batch adsorption study was applied to analyse the defluoridation efficiency of various bioadsorbents. At pH 6 to 7 maximum de fluoridation was achieved, with the increasing adsorbentdose with time, the percentage of fluoride removal was increased. The efficiency of adsorption offluoride ion was also affected by the contact time and particle size of the adsorbents. In this paper we have done comparative study of different peels and leaves biochar for their fluoride removal efficiency and have suggested best bioadsorbents among them. Brief discussion on various low cost adsorbents used for fluoride removal from water is done.
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