RCEES OpenIR  > 中国科学院饮用水科学与技术重点实验室
Accelerated degradation of pesticide by permanganate oxidation: A comparison of organic and inorganic activations
Xu, Lei; Dong, Huiyu; Xu, Ke; Li, Jin; Qiang, Zhimin
2019-08-01
Source PublicationCHEMICAL ENGINEERING JOURNAL
ISSN1385-8947
Volume369Pages:1119-1128
AbstractPermanganate (PM) is a widely-used oxidant in water treatment. However, the oxidation rate of micro-pollutants by PM is highly variable, dependent on the electron density of certain moieties of micro-pollutants. Using a pesticide (carbendazim, CBZ) as a target micro-pollutant, this study compared the organic and inorganic activations of PM by benzoquinone (PM/BQ) and bisulfite (PM/BS), respectively. It was found that both the PM/BQ and PM/BS systems could accelerate the degradation of CBZ with different degradation rates. The PM/BS system completed the degradation of CBZ (96.6%) within 15 s, while the PM/BQ system took 2 h to achieve a 95.7% removal. The optimal molar ratios of [P M](o): [BS](o) and [PM](o): [BQ](o) were determined to be 1:5 and 1:0.1, respectively. Interestingly, both the degradation of CBZ in the PM/BQ and PM/BS systems were dependent on dissolved oxygen (DO) concentration. When DO was around 0.5 mg L-1, the removals of CBZ by the PM/BQ and PM/BS systems were just 3.6% and 36.8%, respectively after 2 h, significantly lower than those under 9.1-mg L-1 DO (95.7% and 96.6%, respectively). Based on the quenching experiments, the enhanced degradation in the PM/BQ system was mainly ascribed to the formations of Mn(III) and O-1(2), while the formations of SO5 center dot- and SO4 center dot- mainly contributed to the accelerated degradation in the PM/BS system. The transformation products of CBZ in both the PM/BQ and PM/BS systems were identified and the degradation pathways including dehydrogenation, alkylation, carboxylation and hydroxylation were proposed. The inorganic activation of PM by BS exhibits a higher degradation rate and stability under different water matrices, indicating its potential engineering application in water treatment.
Department中国科学院饮用水科学与技术重点实验室
KeywordPesticide Permanganate/bisulfite Permanganate/benzoquinone Dissolved oxygen Activation
Document Type期刊论文
Identifierhttp://ir.rcees.ac.cn/handle/311016/43416
Collection中国科学院饮用水科学与技术重点实验室
Affiliation1.Chinese Acad Sci, Univ Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Key Lab Drinking Water Sci & Technol, Beijing 100085, Peoples R China
2.Qingdao Univ, Coll Environm Sci & Engn, Qingdao 266071, Shandong, Peoples R China
Recommended Citation
GB/T 7714
Xu, Lei,Dong, Huiyu,Xu, Ke,et al. Accelerated degradation of pesticide by permanganate oxidation: A comparison of organic and inorganic activations[J]. CHEMICAL ENGINEERING JOURNAL,2019,369:1119-1128.
APA Xu, Lei,Dong, Huiyu,Xu, Ke,Li, Jin,&Qiang, Zhimin.(2019).Accelerated degradation of pesticide by permanganate oxidation: A comparison of organic and inorganic activations.CHEMICAL ENGINEERING JOURNAL,369,1119-1128.
MLA Xu, Lei,et al."Accelerated degradation of pesticide by permanganate oxidation: A comparison of organic and inorganic activations".CHEMICAL ENGINEERING JOURNAL 369(2019):1119-1128.
Files in This Item: Download All
File Name/Size DocType Version Access License
Accelerated degradat(678KB)期刊论文出版稿开放获取CC BY-NC-SAView Download
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Xu, Lei]'s Articles
[Dong, Huiyu]'s Articles
[Xu, Ke]'s Articles
Baidu academic
Similar articles in Baidu academic
[Xu, Lei]'s Articles
[Dong, Huiyu]'s Articles
[Xu, Ke]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Xu, Lei]'s Articles
[Dong, Huiyu]'s Articles
[Xu, Ke]'s Articles
Terms of Use
No data!
Social Bookmark/Share
File name: Accelerated degradation of pesticide by permanganate oxidation A comparison of organic and inorganic activations.pdf
Format: Adobe PDF
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.