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Enhanced removal of benzothiazole in persulfate promoted wet air oxidation via degradation and synchronous polymerization
Zhou, Linbi1,2; Xie, Yongbing2; Cao, Hongbin1,2; Guo, Zhuang2; Wen, Jiawei1,2; Shi, Yanchun2
2019-08-15
Source PublicationCHEMICAL ENGINEERING JOURNAL
ISSN1385-8947
Volume370Pages:208-217
Abstract

We air oxidation (WAO) has an obvious advantage in treating wastewater with high concentration of organics, but harsh reaction conditions are required and the treatment efficiency has not reached a satisfactory level. Herein, we developed a low dosage of persulfate promoted WAO process (PWAO) to remove a model hetero-cyclic pollutant benzothiazole (BTH). The addition of persulfate remarkably enhanced the elimination of benzothiazole (BTH) and COD from water via degradation and polymerization. Under optimized operation condition (with 11.1 mM K2S2O8 addition into WAO), about 65.0% of BTH converted into microsphere polymers and more than 94.6% COD was eliminated from water after polymers separation. Electron paramagnetic resonance (EPR) analysis and quenching experiments revealed that center dot OH was effectively generated in a wide range of reaction temperature and it played the key role in BTH degradation and polymerization, while SO4 center dot(-) was detected at low temperature for its fast decomposition at high temperature. Quantum chemical calculation together with ultraperformance liquid chromatography with electrospray ionization tandem mass spectrometry (UPLC-ESI-MS) analysis confirmed that the degradation and polymerization of BTH mainly started from the heterocyclic ring, followed by further oxidation or polymerization. Comparing with normal WAO process, the PWAO technology had an advantage in lower operating cost in removing per unit COD and carbon resource recycle, which indicates a promising prospect in treating wastewater with high concentration of heterocyclic compounds.

KeywordPersulfate Wet Air Oxidation (Pwao) Benzothiazole Hydroxyl Radical Persulfate Radical Polymerization Carbon Recycling
DOI10.1016/j.cej.2019.03.201
Language英语
WOS KeywordHeat-activated Persulfate ; Carbon Nanotubes ; Catalytic-activity ; Waste-water ; Kinetics ; Acid ; Transformation ; Mechanism ; Phenol ; Peroxymonosulfate
Funding ProjectChinese Academy of Sciences[ZDRW-ZS-2016-5-3] ; Beijing Natural Science Foundation[8172043] ; National Science Fund for Distinguished Young Scholars of China[51425405]
WOS Research AreaEngineering
WOS SubjectEngineering, Environmental ; Engineering, Chemical
Funding OrganizationChinese Academy of Sciences ; Beijing Natural Science Foundation ; National Science Fund for Distinguished Young Scholars of China
WOS IDWOS:000467387200018
PublisherELSEVIER SCIENCE SA
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/28127
Collection中国科学院过程工程研究所
Corresponding AuthorXie, Yongbing
Affiliation1.Tianjin Univ, Sch Chem Engn & Technol, Tianjin 300072, Peoples R China
2.Chinese Acad Sci, Inst Proc Engn, Beijing Engn Res Ctr Proc Pollut Control, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Zhou, Linbi,Xie, Yongbing,Cao, Hongbin,et al. Enhanced removal of benzothiazole in persulfate promoted wet air oxidation via degradation and synchronous polymerization[J]. CHEMICAL ENGINEERING JOURNAL,2019,370:208-217.
APA Zhou, Linbi,Xie, Yongbing,Cao, Hongbin,Guo, Zhuang,Wen, Jiawei,&Shi, Yanchun.(2019).Enhanced removal of benzothiazole in persulfate promoted wet air oxidation via degradation and synchronous polymerization.CHEMICAL ENGINEERING JOURNAL,370,208-217.
MLA Zhou, Linbi,et al."Enhanced removal of benzothiazole in persulfate promoted wet air oxidation via degradation and synchronous polymerization".CHEMICAL ENGINEERING JOURNAL 370(2019):208-217.
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