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Alkaline electrochemical advanced oxidation process for chromium oxidation at graphitized multi-walled carbon nanotubes
Xue, Yudong1,2; Zheng, Shili1; Sun, Zhi1; Zhang, Yi1; Jin, Wei1
2017-09-01
Source PublicationCHEMOSPHERE
ISSN0045-6535
Volume183Issue:SEPPages:156-163
Abstract

Alkaline electrochemical advanced oxidation processes for chromium oxidation and Cr-contaminated waste disposal were reported in this study. The highly graphitized multi-walled carbon nanotubes g-MWCNTs modified electrode was prepared for the in-situ electrochemical generation of HO2-. RRDE test results illustrated that g-MWCNTs exhibited much higher two-electron oxygen reduction activity than other nanocarbon materials with peak current density of 1.24 mA cm(-2), %HO2- of 77.0% and onset potential of -0.15 V (vs. Hg/HgO). It was originated from the highly graphitized structure and good electrical conductivity as illustrated from the Raman, XRD and EIS characterizations, respectively. Large amount of reactive oxygen species (HO2- and center dot OH) were in-situ electro-generated from the two-electron oxygen reduction and chromium-induced alkaline electro-Fenton-like reaction. The oxidation of Cr(III) was efficiently achieved within 90 min and the conversion ratio maintained more than 95% of the original value after stability test, offering an efficient and green approach for the utilization of Cr-containing wastes. (C) 2017 Elsevier Ltd. All rights reserved.

KeywordCarbon Nanotubes Chromium Eaops Reactive Oxygen Species Alkaline Media
SubtypeArticle
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine
DOI10.1016/j.chemosphere.2017.05.115
Indexed BySCI
Language英语
WOS KeywordOXYGEN REDUCTION REACTION ; ELECTRO-FENTON PROCESS ; CR(III) OXIDATION ; KOH SOLUTIONS ; DOPED CARBON ; FELT CATHODE ; WASTE-WATER ; H2O2 ; GRAPHENE ; REMOVAL
WOS Research AreaEnvironmental Sciences & Ecology
WOS SubjectEnvironmental Sciences
Funding OrganizationNational Natural Science Foundation of China(51604253) ; CAS Pioneer Hundred Talents Program ; National Basic Research Program of China (973 Program)(2013CB632601 ; 2013CB632605)
WOS IDWOS:000404196400018
Citation statistics
Cited Times:15[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/22697
Collection湿法冶金清洁生产技术国家工程实验室
Affiliation1.Chinese Acad Sci, Inst Proc Engn, Natl Engn Lab Hydromet Cleaner Prod Technol, Key Lab Green Proc & Engn, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Xue, Yudong,Zheng, Shili,Sun, Zhi,et al. Alkaline electrochemical advanced oxidation process for chromium oxidation at graphitized multi-walled carbon nanotubes[J]. CHEMOSPHERE,2017,183(SEP):156-163.
APA Xue, Yudong,Zheng, Shili,Sun, Zhi,Zhang, Yi,&Jin, Wei.(2017).Alkaline electrochemical advanced oxidation process for chromium oxidation at graphitized multi-walled carbon nanotubes.CHEMOSPHERE,183(SEP),156-163.
MLA Xue, Yudong,et al."Alkaline electrochemical advanced oxidation process for chromium oxidation at graphitized multi-walled carbon nanotubes".CHEMOSPHERE 183.SEP(2017):156-163.
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