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Aluminum(Al) and Iron(Fe) electrodes were used for simultaneous removal of arsenite and fluoride from ground water using novel electrochemical coagulation (ECC)with special focus on electrode placing positions of Fe and Al in a batch electrochemical reactor (BECR). A series of experiments were carried out to observe the influence of electrode placing positions on removal. Of the many electrode combination, Al1-Al2-Al3-Al4, Fe1-Fe2-Fe3-Fe4, Al1-Al2-Fe3-Al4 and Fe1-Fe2-Al3-Fe4 are discussed in this paper for pre-optimized operating conditions: 4 plate electrodes, As(III)0: 1.6 mg/L, F0-:12 mg/L, Al 3+: 0 mg/L, Fe0: 0.061 mg/L, inter-electrode spacing: 5mm, applied cell voltage:16V, SA/V ratio: 40 m 2/m3 and electrolysis time of 45 minutes. For the said electrode combinations,the maximum simultaneous removal of both arsenite and fluoride was obtained for Fe1-Fe2-Al3-Fe4 with 97% arsenite removal from its initial value of 1.6 mg/L; and 100% fluoride removal from its initial value of 12 mg/L within 45 min of ET. Energy consumption was 2.01 KWh/m3 with operating cost of 2.90 Rs./m3.

Simultaneous Removal of Arsenite and Fluoride from Groundwater using Batch Electrochemical Coagulation Process-Role of Aluminum with Iron Electrodes