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Sequential reduction/oxidation of azo dyes in a three-dimensional biofilm electrode reactor
Liu, Shentan1,2; Feng, Xiaojuan3; Gu, Feng1; Li, Xianning1; Wang, Yujue2
2017-11-01
Source PublicationCHEMOSPHERE
ISSN0045-6535
Volume186Pages:287-294
Corresponding AuthorLi, Xianning(lxn@seu.edu.cn)
AbstractBy combining sequential anaerobic-aerobic reactor and penetrable cathode-anode operation, a novel anaerobic/aerobic sequencing three-dimensional biofilm electrode reactor (3D-BER) was developed to evaluate the degradation of azo dye reactive brilliant red X-3B (RBRX-3B). In the bottom cathodic region, anaerobic reductive conditions and H-2 were produced for the bioreduction of azo dyes; in the top anodic region, aerobic oxidative conditions and O-2 were produced for the mineralization of dye intermediates. Due to the supply of electrical power, electrons could be mediated via electrolysis of water or directly transfer between electrodes and microbe cells. The biofilm immobilized on the surface of the cathode utilized electrode or H-2 as electron donors and accelerated the rate of RBRX-3B reduction, and the decolorization rate was significantly increased 2.6-3.7 fold, reaching at 2.52-3.39 mol/m(3)/d at an energy consumption of 0.15 kWh/mol RBRX-3B. RBRX-3B was reductively cleaved into aromatic amines at the biocathode and these amines were effectively removed at the bioanode. Acute toxicity tests showed that the intermediates of RBRX-3B were more toxic when compared with the initial influent, and the 3D-BER effluent exhibited much lower toxicity (5% inhibition of bioluminescence of Vibrio fisheri) than the electrochemical and biological effluent (65% and 30% inhibition, respectively). These findings suggest the novel 3D-BER may provide a promising alternative to remove azo dyes in dyeing wastewater. (C) 2017 Elsevier Ltd. All rights reserved.
KeywordBiofilm electrode reactor Azo dye Decolorization Biocathode Electron shuttle
DOI10.1016/j.chemosphere.2017.08.001
WOS KeywordBRILLIANT RED X-3B ; TEXTILE WASTE-WATER ; ELECTRICAL-STIMULATION ; DECOLORIZATION ; REMOVAL ; DEGRADATION ; TECHNOLOGIES ; WASTEWATERS ; NITRATE ; SYSTEM
Indexed BySCI
Language英语
Funding ProjectNational Nature Science Foundation of China[21277024] ; China Postdoctoral Science Foundation[2016M601049]
Funding OrganizationNational Nature Science Foundation of China ; China Postdoctoral Science Foundation
WOS Research AreaEnvironmental Sciences & Ecology
WOS SubjectEnvironmental Sciences
WOS IDWOS:000411846900034
PublisherPERGAMON-ELSEVIER SCIENCE LTD
Citation statistics
Cited Times:7[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/62367
Collection中国科学院地理科学与资源研究所
Corresponding AuthorLi, Xianning
Affiliation1.Southeast Univ, Sch Energy & Environm, Nanjing 210096, Jiangsu, Peoples R China
2.Tsinghua Univ, Sch Environm, Beijing Key Lab Emerging Organ Contaminants Contr, State Key Joint Lab Environm Simulat & Pollut Con, Beijing 100084, Peoples R China
3.Chinese Acad Sci, Ctr Environm Remediat, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China
Recommended Citation
GB/T 7714
Liu, Shentan,Feng, Xiaojuan,Gu, Feng,et al. Sequential reduction/oxidation of azo dyes in a three-dimensional biofilm electrode reactor[J]. CHEMOSPHERE,2017,186:287-294.
APA Liu, Shentan,Feng, Xiaojuan,Gu, Feng,Li, Xianning,&Wang, Yujue.(2017).Sequential reduction/oxidation of azo dyes in a three-dimensional biofilm electrode reactor.CHEMOSPHERE,186,287-294.
MLA Liu, Shentan,et al."Sequential reduction/oxidation of azo dyes in a three-dimensional biofilm electrode reactor".CHEMOSPHERE 186(2017):287-294.
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