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Activated carbon electrodes: Electrochemical oxidation coupled with desalination for wastewater treatment
Duan, Feng1,2; Li, Yuping1; Cao, Hongbin1; Wang, Yi1; Crittenden, John C.3; Zhang, Yi1
Source PublicationCHEMOSPHERE

The wastewater usually contains low-concentration organic pollutants and some inorganic salts after biological treatment. In the present work, the possibility of simultaneous removal of them by combining electrochemical oxidation and electrosorption was investigated. Phenol and sodium chloride were chosen as representative of organic pollutants and inorganic salts and a pair of activated carbon plate electrodes were used as anode and cathode. Some important working conditions such as oxygen concentration, applied potential and temperature were evaluated to reach both efficient phenol removal and desalination. Under optimized 2.0 V of applied potential, 38 degrees C of temperature, and 500 mL min(-1) of oxygen flow, over 90% of phenol, 60% of TOC and 20% of salinity were removed during 300 min of electrolysis time. Phenol was removed by both adsorption and electrochemical oxidation, which may proceed directly or indirectly by chlorine and hypochlorite oxidation. Chlorophenols were detected as degradation intermediates, but they were finally transformed to carboxylic acids. Desalination was possibly attributed to electrosorption of ions in the pores of activated carbon electrodes. The charging/regeneration cycling experiment showed good stability of the electrodes. This provides a new strategy for wastewater treatment and recycling. (C) 2014 Elsevier Ltd. All rights reserved.

KeywordElectrosorption Desalination Capacitive Deionization Electrochemical Oxidation Phenol Wastewater Treatment
Subject AreaEnvironmental Sciences & Ecology
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine
Indexed BySCI
WOS KeywordCapacitive Deionization ; Xerogel Electrodes ; Anodic-oxidation ; Fenton Process ; Phenol ; Degradation ; Performance ; Cathode ; Electrooxidation ; Dependence
Funding ProjectNational Natural Science Foundation of China [20607023, 21177130, 21377130] ; Brook Byers Institute for Sustainable Systems, Hightower Chair ; Georgia Research Alliance at the Georgia Institute of Technology
WOS Research AreaEnvironmental Sciences & Ecology
WOS SubjectEnvironmental Sciences
WOS IDWOS:000351646800026
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Document Type期刊论文
Corresponding AuthorLi, Yuping
Affiliation1.Chinese Acad Sci, Inst Proc Engn, Key Lab Green Proc & Engn, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Georgia Inst Technol, Brook Byers Inst Sustainable Syst, Atlanta, GA 30332 USA
Recommended Citation
GB/T 7714
Duan, Feng,Li, Yuping,Cao, Hongbin,et al. Activated carbon electrodes: Electrochemical oxidation coupled with desalination for wastewater treatment[J]. CHEMOSPHERE,2015,125(APR):205-211.
APA Duan, Feng,Li, Yuping,Cao, Hongbin,Wang, Yi,Crittenden, John C.,&Zhang, Yi.(2015).Activated carbon electrodes: Electrochemical oxidation coupled with desalination for wastewater treatment.CHEMOSPHERE,125(APR),205-211.
MLA Duan, Feng,et al."Activated carbon electrodes: Electrochemical oxidation coupled with desalination for wastewater treatment".CHEMOSPHERE 125.APR(2015):205-211.
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