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An adsorbent prepared by activating the carbon powder derived from the barks of Ficus racemosa plant with HNO3 (ACBFR) has been used for defluoridation studies. Extraction conditions have been optimized for the maximum removal of fluoride; 88% removal is observed at pH: 7, sorbent dosage: 4gm/L, time of agitation: 60min, initial concentration of the fluoride ions: 5mg/L and temperature: 30°C. On analyzing...