Details

Autor(en) / Beteiligte

• Min, Kyung-Sok
• Yu, Jae-Jeong
• Kim, Young-Ju
• Yun, Zuwhan

Titel

Removal of Ammonium from Tannery Wastewater by Electrochemical Treatment

Ist Teil von

• Journal of environmental science and health. Part A, Toxic/hazardous substances & environmental engineering, 2004-07, Vol.39 (7), p.1867-1879

Ort / Verlag

England: Taylor & Francis Group

Erscheinungsjahr

2004

Quelle

MEDLINE

Beschreibungen/Notizen

• The removal of ammonium from coagulated tannery wastewaters was investigated by an electrochemical method using Ti/IrO 2 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 NH 4 -N concentration of 870 mg L −1 .