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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 Publication | CHEMICAL ENGINEERING JOURNAL
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ISSN | 1385-8947 |
Volume | 370Pages: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. |
Keyword | Persulfate Wet Air Oxidation (Pwao) Benzothiazole Hydroxyl Radical Persulfate Radical Polymerization Carbon Recycling |
DOI | 10.1016/j.cej.2019.03.201 |
Language | 英语 |
WOS Keyword | Heat-activated Persulfate ; Carbon Nanotubes ; Catalytic-activity ; Waste-water ; Kinetics ; Acid ; Transformation ; Mechanism ; Phenol ; Peroxymonosulfate |
Funding Project | Chinese 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 Area | Engineering |
WOS Subject | Engineering, Environmental ; Engineering, Chemical |
Funding Organization | Chinese Academy of Sciences ; Beijing Natural Science Foundation ; National Science Fund for Distinguished Young Scholars of China |
WOS ID | WOS:000467387200018 |
Publisher | ELSEVIER SCIENCE SA |
Citation statistics | |
Document Type | 期刊论文 |
Identifier | http://ir.ipe.ac.cn/handle/122111/28127 |
Collection | 中国科学院过程工程研究所 |
Corresponding Author | Xie, Yongbing |
Affiliation | 1.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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