Towards a better understanding of the synergistic effect in the electro-peroxone process using a three electrode system
Guo, Zhuang1,2; Xie, Yongbing1; Wang, Yuxian3; Cao, Hongbin1; Xiao, Jiadong1,2; Yang, Jin1; Zhang, Yi1
2018-04-01
发表期刊CHEMICAL ENGINEERING JOURNAL
ISSN1385-8947
卷号337页码:733-740
摘要Electro-peroxone process utilizes the in-situ generated H2O2 by electro-reduction of O-2 to react with ozone molecule to produce hydroxyl radical, and achieves high efficiency in the wastewater treatment. However, detailed reaction mechanism in this process is still deficient. In this paper, a three-electrode system was adopted in the electro-peroxone process, and the origin of the synergy was revealed with the aid of the rotating ring disk electrodes. It was found that besides the main reaction between O-3 and H2O2, O-3 is also electro-reduced to O-3(center dot-) and then transformed into (OH)-O-center dot. Meanwhile, O-3 electro-reduction on the cathode can also possibly generate O-2 and promote H2O2 production. Higher concentration of OH- near the cathode originated from O-2 and O-3 reduction may also react with O-3 to produce H2O2. These two pathways contributed to the higher amount of H2O2 than the system with O-2 bubbling only, and ultimately contributed to produce more (OH)-O-center dot. All these reactions are synthetically responsible for the higher degradation rate of sodium oxalate in the electro-peroxone process than those in O-3-electrolysis and ozonation processes, respectively. Though this system was quite different from normal electro-peroxone process, the conclusions are useful for understanding the practical reactions possibly happened on electrodes in the electro-peoxone process.
关键词Electro-peroxone Hydrogen Peroxide Hydroxyl Radicals Three-electrode System Rotating Ring-disk Electrode
文章类型Article
WOS标题词Science & Technology ; Technology
DOI10.1016/j.cej.2017.11.178
收录类别SCI
语种英语
关键词[WOS]WASTE-WATER TREATMENT ; ADVANCED OXIDATION PROCESSES ; ACTIVATED CARBON ; CATALYTIC OZONATION ; VISIBLE-LIGHT ; OXALIC-ACID ; DEGRADATION ; MECHANISM ; REMOVAL ; OZONE
WOS研究方向Engineering
WOS类目Engineering, Environmental ; Engineering, Chemical
项目资助者National Science Fund for Distinguished Young Scholars of China(51425405) ; Beijing Natural Science Foundation(8172043) ; Major Science and Technology Program for Water Pollution Control and Treatment(2015ZX07202013)
WOS记录号WOS:000427616900072
引用统计
文献类型期刊论文
条目标识符http://ir.ipe.ac.cn/handle/122111/24120
专题湿法冶金清洁生产技术国家工程实验室
作者单位1.Chinese Acad Sci, Natl Engn Lab Hydromet Cleaner Prod Technol, Beijing Engn Res Ctr Proc Pollut Control, Div Environm Technol & Engn,Inst Proc Engn, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.China Univ Petr, State Key Lab Heavy Oil Proc, 18 Fuxue Rd, Beijing 102249, Peoples R China
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GB/T 7714
Guo, Zhuang,Xie, Yongbing,Wang, Yuxian,et al. Towards a better understanding of the synergistic effect in the electro-peroxone process using a three electrode system[J]. CHEMICAL ENGINEERING JOURNAL,2018,337:733-740.
APA Guo, Zhuang.,Xie, Yongbing.,Wang, Yuxian.,Cao, Hongbin.,Xiao, Jiadong.,...&Zhang, Yi.(2018).Towards a better understanding of the synergistic effect in the electro-peroxone process using a three electrode system.CHEMICAL ENGINEERING JOURNAL,337,733-740.
MLA Guo, Zhuang,et al."Towards a better understanding of the synergistic effect in the electro-peroxone process using a three electrode system".CHEMICAL ENGINEERING JOURNAL 337(2018):733-740.
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