Document Detail

Removal of ammonium from tannery wastewater by electrochemical treatment.
MedLine Citation:
PMID:  15242133     Owner:  NLM     Status:  MEDLINE    
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).
Kyung-Sok Min; Jae-Jeong Yu; Young-Ju Kim; Zuwhan Yun
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of environmental science and health. Part A, Toxic/hazardous substances & environmental engineering     Volume:  39     ISSN:  1093-4529     ISO Abbreviation:  J Environ Sci Health A Tox Hazard Subst Environ Eng     Publication Date:  2004  
Date Detail:
Created Date:  2004-07-09     Completed Date:  2004-09-14     Revised Date:  2009-08-14    
Medline Journal Info:
Nlm Unique ID:  9812551     Medline TA:  J Environ Sci Health A Tox Hazard Subst Environ Eng     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1867-79     Citation Subset:  IM    
Department of Environmental Engineering, Kyungpook National University, Sangeokdong, Daegu, Korea.
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MeSH Terms
Biodegradation, Environmental
Hydroxyl Radical / analysis,  chemistry
Iridium / chemistry
Oxidants / analysis,  chemistry
Quaternary Ammonium Compounds / isolation & purification*
Titanium / chemistry
Waste Disposal, Fluid / methods*
Water Purification / methods*
Reg. No./Substance:
0/Oxidants; 0/Quaternary Ammonium Compounds; 12030-49-8/iridium oxide; 3352-57-6/Hydroxyl Radical; 7439-88-5/Iridium; 7440-32-6/Titanium

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