Decomposition of dexamethasone by gamma irradiation: Kinetics, degradation mechanisms and impact on algae growth
文献类型：期刊论文
| 作者 | Guo, Zhaobing2,3; Guo, Anke2,3; Guo, Qingjun1; Rui, Maoling2,3; Zhao, Yongfu4; Zhang, Haixiao2,3; Zhu, Shengnan2,3 |
| 刊名 | CHEMICAL ENGINEERING JOURNAL
 |
| 出版日期 | 2017 |
| 卷号 | 307页码:722-728 |
| 关键词 | Gamma irradiation Dexamethasone Removal mechanism Kinetics Algae growth |
| ISSN号 | 1385-8947 |
| DOI | 10.1016/j.cej.2016.08.138 |
| 通讯作者 | Guo, Zhaobing(guozbnuist@163.com) ; Guo, Qingjun(guoqj@igsnrr.ac.cn) |
| 英文摘要 | Gamma-irradiation induced degradation of dexamethasone (DEX) in aqueous solution was investigated under different conditions. The results indicate that low-concentration DEX could be effectively decomposed during gamma irradiation. H2O2 and Fenton reagent were favorable for DEX radiolytic removal. However, DEX radiolysis was restrained in the presence of NO3-, CO32-, 2-propanol and tert-butanol. DEX radiolytic degradation was in accordance with the pseudo first-order reaction kinetics. The rate constant ratios of OH, e(aq)(-) and H-center dot towards DEX degradation could be calculated as k(OH): k(eaq-): k(H) = 10:1.5:1. Besides, it is observed that radiolytic degradation of DEX restrained algae growth. Finally, LC-MS analysis was employed to identify the intermediates and Gaussian 03 software was used to optimize DEX geometry structure. On the basis of LC-MS analysis and Gaussian calculations, we attributed DEX radiolytic removal to (OH)-O-center dot oxidation, (OH)-O-center dot radical substitution and direct cleavage of DEX molecules. (C) 2016 Elsevier B.V. All rights reserved. |
| WOS关键词 | AQUEOUS-SOLUTION ; RAY IRRADIATION ; RADIATION ; REMOVAL ; WATER ; EXPOSURE ; ATRAZINE |
| 资助项目 | National Natural Science Foundation of China[41373023] ; National Natural Science Foundation of China[21473092] ; Jiangsu Province 333 talent ; Priority Academic Program Development of Jiangsu Higher Education Institutions |
| WOS研究方向 | Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:000387298200075 |
| 出版者 | ELSEVIER SCIENCE SA |
| 资助机构 | National Natural Science Foundation of China ; Jiangsu Province 333 talent ; Priority Academic Program Development of Jiangsu Higher Education Institutions |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/65830]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Guo, Zhaobing; Guo, Qingjun |
| 作者单位 | 1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Ctr Environm Remediat, Beijing 100101, Peoples R China 2.Nanjing Univ Informat Sci & Technol, Sch Environm Sci & Engn, Nanjing 210044, Jiangsu, Peoples R China 3.Collaborat Innovat Ctr Atmospher Environm & Equip, Nanjing 210044, Jiangsu, Peoples R China 4.Jiangsu Acad Agr Sci, Inst Applicat Atom Energy Agr, Nanjing 210014, Jiangsu, Peoples R China |
| 推荐引用方式 GB/T 7714 | Guo, Zhaobing,Guo, Anke,Guo, Qingjun,et al. Decomposition of dexamethasone by gamma irradiation: Kinetics, degradation mechanisms and impact on algae growth[J]. CHEMICAL ENGINEERING JOURNAL,2017,307:722-728. |
| APA | Guo, Zhaobing.,Guo, Anke.,Guo, Qingjun.,Rui, Maoling.,Zhao, Yongfu.,...&Zhu, Shengnan.(2017).Decomposition of dexamethasone by gamma irradiation: Kinetics, degradation mechanisms and impact on algae growth.CHEMICAL ENGINEERING JOURNAL,307,722-728. |
| MLA | Guo, Zhaobing,et al."Decomposition of dexamethasone by gamma irradiation: Kinetics, degradation mechanisms and impact on algae growth".CHEMICAL ENGINEERING JOURNAL 307(2017):722-728. |
入库方式： OAI收割
来源：地理科学与资源研究所
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