Arsenite removal from aqueous solution by aerated iron electrocoagulation process

ABSTRACT

Arsenite removal by aerated iron electrocoagulation process was investigated in this present study. Electrocoagulation experiments were executed in a 5L capacity rectangular tank equipped with 14 iron electrodes. Very poor arsenite removal was observed during electrocoagulation without aeration. The external addition of air enhanced the efficiency of electrocoagulation process and complete removal of arsenite was observed from its initial concentration of 1 mg/L by applying the voltage of 5V with 60 min of electrolysis. pH is not showing any significant influence in the electrocoagulation process coupled with external aeration. The sludge generated after electrocoagulation was identified with the help of, scanning electron microscopy (SEM), X-ray diffraction (XRD), and Fourier transforms infrared (FTIR) techniques.

KEYWORDS:

• Aerated electrocoagulation
• Arsenite
• Iron electrodes
• Water treatment

Acknowledgements

Authors are thankful to the Director, CSIR-NEERI, Nagpur, India for providing encouragement, and kind permission for publishing the article. This work was supported by Science and Engineering Research Board (File Number: ECR/2017/000005) and the authors are grateful to SERB for supporting.

Additional information

Funding

This work was supported by the Science and Engineering Research Board [ECR/2017/000005].