KMS of Research Center for Eco-Environmental Sciences， CAS
| 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 Publication | CHEMICAL ENGINEERING JOURNAL
 |
| ISSN | 1385-8947 |
| Volume | 369Pages:1119-1128 |
| Abstract | Permanganate (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 |
| Keyword | Pesticide Permanganate/bisulfite Permanganate/benzoquinone Dissolved oxygen Activation |
| Document Type | 期刊论文 |
| Identifier | http://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 |
| Affiliation | 1.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. |
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| Accelerated degradat（678KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Download | |
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