@@ 1 Introduction Exposure to excess fluoride in drinking water could cause harmful effects. Several technologies, including precipitation, adsorption, ion exchange, membrane separation and electro dialysis have been developed and evaluated for fluoride removal. Among these methods, adsorption has been considered the most efficient and applicable technology. However, there were several problems associated with adsorption methods, for example low adsorption capacity, narrow available pH range and frequent regeneration or replacement was needed. Electrochemistry, such as electro-sorption technology which can enhance the adsorption capacity by electric field has been developed. Electro-sorption technology has been successfully and efficiently used to remove Na2SO4, Na3PO4, Na2CO3, NH4+, C1O4?, Cr ( VI ) ,while the performance of removing fluoride ions in drinking is not good. In this study, the ACFs (Activated Carbon Fibers) has been modified used as the anode working electrode to improve the performance of defluoridation. In addition, defluoridation performance was evaluated for simulated F containing groundwater samples using consecutive tests in the electro-adsorption equipment.
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