US EPA

1519139 

Journal Article 

Arsenite removal from water by electro-coagulation on zinc-zinc and copper-copper electrodes 

Ali, I; Asim, M; Khan, TA 

2013 

Yes 

International Journal of Environmental Science and Technology
ISSN: 1735-1472
EISSN: 1735-2630 

10 

2 

377-384 

10.1007/s13762-012-0113-z 

WOS:000314724200018 

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. 

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