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- W2553316615 abstract "Abstract An adsorbent prepared by activating the carbon powder derived from the barks of Ficus racemosa plant with HNO 3 (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: 4 gm/L, time of agitation: 60 min, initial concentration of the fluoride ions: 5 mg/L and temperature: 30 °C. On analyzing the nature of adsorption using Langmuir, Freundlich, Dubinin-Radushkevich, and Temkin isotherm models, Langmuir model has provided a best correlation (R 2 value: 0.9936) for the adsorption of fluoride ions. Adsorption kinetics is found to follow the pseudo second ordered model with correlation coefficient value of R 2 = 0.998. Surface morphological studies are made using SEM, EDX and FTIR. Thermodynamic parameters are studied and found that the adsorption process is endothermic and spontaneous in nature. The influence of co-anions on the% of extraction of fluoride ions is in the order of: PO 4 3− > HCO 3 − > SO 4 2− > NO 3 − > Cl − . The removal of fluoride is found to be 1.65 mg/g. The methodology developed in this work has been applied to real fluoride-polluted waters and found to be successful." @default.
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- W2553316615 date "2017-01-01" @default.
- W2553316615 modified "2023-10-02" @default.
- W2553316615 title "Defluoridation studies using active carbon derived from the barks of Ficus racemosa plant" @default.
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- W2553316615 doi "https://doi.org/10.1016/j.jfluchem.2016.11.013" @default.
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