PMID: 15242133Jul 10, 2004Paper

Removal of ammonium from tannery wastewater by electrochemical treatment

Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
Kyung-Sok MinZuwhan Yun

Abstract

The removal of ammonium from coagulated tannery wastewaters was investigated by an electrochemical method using Ti/IrO2 as an anode. Operating variables including the current density, pH and chloride concentration were considered in order to determine their effect on the ammonium removal efficiency. A maximum ammonium removal rate of 78.9% was achieved after 30 min of electrochemical treatment with 4 A dm(-2) of current density. During the electrolysis, it had been observed that the ammonium removal was accompanied with an elimination of the organics. Generation of hydroxyl radical was identified during the experiment with hydroxyl radical probe compound of pCBA. Chloride ion worked as the scavenger of hydroxyl radical. Role of free chlorine was the main oxidant for the elimination of ammonium and organic substances. As a result, the biodegradability of tannery wastewater increased after electrochemical treatment. The energy consumed per 1 kg of ammonium removal was 26.6 kWh for initial NH4-N concentration of 870 mg L(-1).

References

Jan 1, 1997·Environmental Pollution·A G Vlyssides, C J Israilides

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Citations

Apr 17, 2009·Journal of Hazardous Materials·Anissa AouniMahmoud Dhahbi
Sep 27, 2008·Journal of Environmental Sciences (China)·Dengjie ZhongTonghua Sun
Nov 27, 2007·Journal of Hazardous Materials·Fatih IlhanM Talha Gonullu
Oct 4, 2006·Journal of Hazardous Materials·Ugur KurtM Talha Gonullu
Jun 6, 2013·The Science of the Total Environment·Giusy LofranoDerin Orhon
Oct 21, 2017·Toxics·Stanley Irobekhian Reuben OkoduwaBalli Gauje

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