Designs of Experiments are usually applied to reduce the number of experiments, time and cost of research. The present research focuses on the application of Taguchi method for optimization of defluoridation of water using Ficus glomerata bark-developed biosorbent. The optimized conditions were found to be pH 7, initial concentration 5 mg L⁻¹, time of contact 120 min, dose of adsorbent 10 g L⁻¹ and temperature 30 °C. The percentage contribution by ANOVA indicates the following order: pH 60.88% > initial concentration of adsorbate 25.73% > adsorbent dose 6.78% > temperature 3.37% > contact time 3.22%. Percentage fluoride removal in the validation experiment performed at optimum conditions was found to be greater than that obtained in all the test runs of Taguchi statistical design method, hence supporting the accuracy of process parameter optimization for fluoride removal under the given set of experimental conditions. Equilibrium study points out the present sorption process is utmost fitted with Langmuir isotherm model with constants ‘a’ and ‘b’ estimated as 2.262 mg g⁻¹ and 0.638 L mg⁻¹. The kinetic study indicates adsorption kinetics best fits pseudo-second-order kinetics. The thermodynamic analyses suggest the spontaneous and endothermic nature (ΔH = 15.394 kJ mol⁻¹) of fluoride adsorption. Advanced studies, viz. BET, FESEM-EDX, and FTIR, are done to know the characteristics of the biosorbent developed from Ficus glomerata adsorbent. Groundwater sample test utilizing the adsorbent revealed the percentage removal efficiency obtained is about 90% and the fluoride content in treated water is fine within drinking water specifications.

实验设计通常用于减少实验次数，减少研究时间和降低研究成本。本研究集中在田口法在利用榕叶树皮开发的生物吸附剂优化水脱氟中的应用。发现最佳条件是pH 7，初始浓度5 mg L ^-1，接触时间120分钟，吸附剂剂量10 g L ^-1和温度30°C。ANOVA的贡献百分比表示以下顺序：pH 60.88％>吸附物的初始浓度25.73％>吸附剂剂量6.78％>温度3.37％>接触时间3.22％。发现在最佳条件下执行的验证实验中的除氟百分比要比Taguchi统计设计方法的所有测试运行中的除氟百分比都高，因此可以支持在给定的实验条件下进行除氟工艺参数优化的准确性。平衡研究指出，目前的吸附过程非常适合Langmuir等温模型，常数“ a”和“ b”估计为2.262 mg g ^-1和0.638 L mg ^-1。动力学研究表明吸附动力学最适合拟二阶动力学。热力学分析表明氟化物吸附具有自发性和吸热性（ΔH= 15.394 kJ mol ^-1）。高级研究，即。进行了BET，FESEM-EDX和FTIR，以了解由榕树吸附剂开发的生物吸附剂的特性。利用吸附剂进行的地下水样品测试表明，所获得的去除率百分比约为90％，在饮用水规格范围内，处理后的水中的氟化物含量很好。