Arsenic contamination in groundwater and its consequences to the human health has been
reported as one of the world’s biggest natural groundwater calamity to the mankind. People
in these aff ected states have chronically exposed to drinking Arsenic contaminated hand
tube-wells water. One of the urgent steps towards mitigation of arsenic contamination in
groundwater is supply of arsenic free or arsenic safe water. The main objective of this study
was selection of suitable electrode for effi cient removal of arsenic from groundwater using
the method of electrocoagulation, which is a useful technique of contaminant removal. The
batch mode experiments were carried out in rectangular glass cell, using diff erent electrode
combination of locally available materials such as mild steel (MS), aluminium (Al) and
stainless steel (SS). The anode-cathode electrode combinations were MS-SS, MS-MS, MSAl,
Al-MS, Al-Al and Al-SS. These critical examinations had been performed under diff erent
operating condition including varying inter electrode distance, current, electrical charge
loading and As (III) to As (V) ratio. The others parameters on treated water such as Fe, pH
and TDS also investigated. MS anode showed 81 - 95% As removal, performed signifi cantly
well as compared to Al anode with 21 - 27% As removal for similar conditions. MS-SS was
more effi cient than MS-MS and MS-Al for higher arsenite to arsenate ratio. Decreasing of
inter electrode distance increased arsenic removal and energy consumption. In treated water,
the concentration of Fe, pH, TDS varied 0.414 - 0.057 mg/L, 7.42 - 7.60, and 391 - 413 mg/L,
respectively. Fe and TDS concentration decreased whereas pH increased from initial value.