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International Journal of Environment Science and Technology
Center for Environment and Energy Research and Studies (CEERS)
ISSN: 1735-1472
EISSN: 1735-2630
Vol. 10, No. 2, 2013, pp. 377-384
Bioline Code: st13039
Full paper language: English
Document type: Research Article
Document available free of charge

International Journal of Environment Science and Technology, Vol. 10, No. 2, 2013, pp. 377-384

 en Arsenite removal from water by electro-coagulation on zinc-zinc and copper-copper electrodes
Ali, I.; Asim, Mohd & Khan, T.A.

Abstract

Removal of arsenite from aqueous solution was carried out using electro-coagulation method. The experiments were conducted using copper-copper and zinc-zinc electrodes. The optimized experimental parameters were 2.0 mg/L initial concentration, 16.0-min processing time, 6.0 pH, 3.0-V applied voltage and 30 °C temperature for zinc-zinc electrodes while these values for copper-copper electrodes were 2.0 mg/L initial concentration, 20.0-min processing time, 7.0 pH, 5.0-V applied voltage and 30 °C temperature. The results demonstrated that zinc-zinc and copper-copper electrodes removed arsenite up to 99.89 and 99.56 %, respectively. The treated water was clear, colorless and odorless without any secondary contamination. There was no change in water quality after the removal of arsenite. The reported method is capable to remove arsenite from water at 6-7 pH range, which is a pH range of natural water. Therefore, this method may be the choice of arsenite removal from natural ground water.

Keywords
Arsenic removal; Electro-chemical method; Eco-friendly; Ground water

 
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