Dechlorination by combined electrochemical reduction and oxidation

Chlorophenols are typical priority pollutants listed by USEPA (U.S. Environmental Protection Agency). The removal of chlorophenol could be carried out by a combination of electrochemical reduction and oxidation method. Results showed that it was feasible to degrade contaminants containing chlorine a...

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Bibliographic Details
Published in:Journal of Zhejiang University. B. Science 2005-06, Vol.6 (6), p.563-568
Main Author: 丛燕青 吴祖成 谭天恩
Format: Article
Language:English
Subjects:
Anodizing
Chemical reduction
Chlorine
Chlorine - chemistry
Chlorine - isolation & purification
Chlorophenol
Chlorophenols - chemistry
Chlorophenols - isolation & purification
Contaminants
Current efficiency
Dechlorination
Degradation
Electrochemical oxidation
Electrochemistry
Electrochemistry - methods
Environmental protection
Environmental Sciences
Hydrogen atoms
Industrial Waste - prevention & control
Instantaneous current
Oxidation
Oxidation-Reduction
Phenols
Pollutants
Reducing agents
Water Pollutants - isolation & purification
Water Purification - methods
化学污染
环境保护
电气化学
电解过程
脱氯技术
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Summary:Chlorophenols are typical priority pollutants listed by USEPA (U.S. Environmental Protection Agency). The removal of chlorophenol could be carried out by a combination of electrochemical reduction and oxidation method. Results showed that it was feasible to degrade contaminants containing chlorine atoms by electrochemical reduction to form phenol, which was further degraded on the anode by electrochemical oxidation. Chlorophenol removal rate was more than 90% by the combined electrochemical reduction and oxidation at current of 6 mA and pH 6. The hydrogen atom is a powerful reducing agent that reductively dechlorinates chlorophenols. The instantaneous current efficiency was calculated and the results indicated that cathodic reduction was the main contributor to the degradation of chlorophenol.
ISSN:1673-1581
1862-1783
DOI:10.1631/jzus.2005.B0563