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Equilibrium,kinetics and breakthrough studies for adsorption of fluoride on activated alumina

机译：活性氧化铝吸附氟的平衡，动力学和突破性研究

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Contamination of drinking water due to fluoride is a severe health hazard problem.Excess of fluoride (>1.5mg/l) in drinking water is harmful to the human health.Various treatment technologies for removing fluoride from groundwater have been investigated in the past.Present investigation aims to remove fluoride by activated alumina.Adsorption isotherm has been modeled by Langmuir equation and isotherm constants.The dependence of the adsorption of fluoride on the pH of the solution has been studied to achieve the optimum pH value and a better understanding of the adsorption mechanism.It was found that maximum adsorption takes place at pH value of 7.Breakthrough analysis revealed that early saturation and lower fluoride removal takes place at higher flow rate and at higher concentrations.Predicted simulation results of one-dimensional model for isothermal,axially dispersed fixed bed on the assumption of pore-diffusion rate-control conditions matches with the experimental data in the initial zone of the breakthrough curve,but deviated marginally in the final tailing zone.Bed depth service time (BDST) model was also applied successfully.
机译：氟化物对饮用水的污染是一个严重的健康危害问题，饮用水中过量的氟化物（> 1.5mg / l）对人体健康有害。过去已经研究了多种用于去除地下水中氟化物的处理技术。研究旨在通过活性氧化铝去除氟化物。通过Langmuir方程和等温常数对吸附等温线进行建模。研究了氟化物的吸附对溶液pH值的依赖性，以达到最佳pH值并更好地理解吸附发现最大的吸附发生在pH值为7的情况下。穿透分析表明，在较高的流速和较高的浓度下会发生早期饱和和较低的氟化物去除。等温，轴向分散的一维模型的预测模拟结果假设孔隙扩散速率控制条件下的固定床与初始实验数据相符突破曲线的最后一个区域，但在最终拖尾区域略有偏离。床深服务时间（BDST）模型也已成功应用。

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