Defluoridation of Aqueous Solution Using Thermally Activated Biosorbents Prepared from Adansonia digitata Fruit Pericarp

The presence of fluoride ions in water poses a significant danger to human health. In Tanzania, where the Rift Valley passes, some people are impaired due elevated levels water. purpose this study was prepare thermally activated Adansonia digitata fruit pericarp biosorbents at 450, 500, 550, and 600°C for defluoridation. Using Brunauer-Emmett-Teller analyzer, surface area pore diameter were measured. scanning electron microscope Fourier transform infrared spectrometry used determine morphological features functional groups biosorbents. To analyze effect pH, adsorbent dose, contact time, initial concentration, response methodology applied. Adsorption isotherms, kinetics, regeneration studies also conducted. There considerably wide areas 385.44, 399.27, 445.71, 447.70 m2/g diameters 0.3055, 3.0341, 3.0375, 3.0471 nm 600°C, respectively. FT-IR spectra indicated oxidation alcoholic –OH carboxylic during activation process, which is proved by shifting peak 3500-3000 cm-1 from raw biosorbent very broad strong band 3500-2000 biosorbent. maximum removal efficiencies 95.55, 96.50, 97.65, 98.36%, respectively, all pH 2, an concentration 27.50 ppm, period 75.00 minutes, dose 5.50 g, indicates that adsorbents successful removal. isotherms kinetics adsorption fitted well with Freundlich ( R 2 = 0.95661 ‐ 0.98445 ) pseudo-second-order id="M2"> 0.94230 0.99634 kinetic models, results showed prepared effective could be defluoridation drinking