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学科主题: Engineering ; Environmental; Engineering ; Civil; Environmental Sciences
题名: Degradation of 17 alpha-ethinylestradiol in aqueous solution by ozonation
作者: Zhang, X; Chen, PY; Wu, F; Deng, NS; Liu, JT; Fang, T
通讯作者: Deng, NS, Wuhan Univ, Sch Resources & Environm Sci, Wuhan 430079, Peoples R China
关键词: 17 alpha-ethinylestradiol (EE2) ; ozonation ; hydroxyl radical ; intermediate ; mechanism
刊名: JOURNAL OF HAZARDOUS MATERIALS
发表日期: 2006-05-20
DOI: 10.1016/j.jhazmat.2005.10.026
卷: 133, 期:1-3, 页:291-298
收录类别: SCI
文章类型: Article
部门归属: Wuhan Univ, Sch Resources & Environm Sci, Wuhan 430079, Peoples R China; Chinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Peoples R China
WOS标题词: Science & Technology ; Technology ; Life Sciences & Biomedicine
类目[WOS]: Engineering, Environmental ; Engineering, Civil ; Environmental Sciences
研究领域[WOS]: Engineering ; Environmental Sciences & Ecology
摘要: This study investigates the ozonation of 17 alpha-ethinylestradiol (EE2) in aqueous solution. The affecting factors on the degradation of EE2 were studied and described in details, such as initial EE2 concentration, initial pH value and ozone concentration. In addition, some parameters such as pH. electrical conductivity, mineralization efficiency and degradation products were monitored during the process. The mineralization efficiency of EE2 could reach 53.9%. During the ozonation process the rapid decrease of pH and the sharp increase of electrical conductivity indicated the fort-nation of acidic by-products, small fragments and ions which were confirmed by high performance liquid chromatography (HPLC) and gas chromatography-mass spectrometry (GUMS) analysis. Results showed that there were intermediate products of smaller molecule with higher polarity produced during the course of EE2 degradation. Then a possible reaction pathway for EE2 degradation involving all intermediates detected is proposed. During the ozonation process EE2 was first oxidized into hydroxyl-semiquinone isomers which were subsequently degraded into low molecular weight compounds such as oxalic acid, malonate, glutarate, and so on. Furthermore. these organic acids are easily oxidized by ozone into carbon dioxide (CO2). This work shows that ozonation process is promising for the removal of EE2. The results can provide some useful information for the potential treatment of EE2 by ozonation in aqueous solution. (c) 2005 Elsevier B.V. All rights reserved.
英文摘要: This study investigates the ozonation of 17 alpha-ethinylestradiol (EE2) in aqueous solution. The affecting factors on the degradation of EE2 were studied and described in details, such as initial EE2 concentration, initial pH value and ozone concentration. In addition, some parameters such as pH. electrical conductivity, mineralization efficiency and degradation products were monitored during the process. The mineralization efficiency of EE2 could reach 53.9%. During the ozonation process the rapid decrease of pH and the sharp increase of electrical conductivity indicated the fort-nation of acidic by-products, small fragments and ions which were confirmed by high performance liquid chromatography (HPLC) and gas chromatography-mass spectrometry (GUMS) analysis. Results showed that there were intermediate products of smaller molecule with higher polarity produced during the course of EE2 degradation. Then a possible reaction pathway for EE2 degradation involving all intermediates detected is proposed. During the ozonation process EE2 was first oxidized into hydroxyl-semiquinone isomers which were subsequently degraded into low molecular weight compounds such as oxalic acid, malonate, glutarate, and so on. Furthermore. these organic acids are easily oxidized by ozone into carbon dioxide (CO2). This work shows that ozonation process is promising for the removal of EE2. The results can provide some useful information for the potential treatment of EE2 by ozonation in aqueous solution. (c) 2005 Elsevier B.V. All rights reserved.
关键词[WOS]: PRODUCT IDENTIFICATION ; ESTROGENIC ACTIVITY ; OXIDATION-PRODUCTS ; RATE CONSTANTS ; WATER ; OZONE ; PHARMACEUTICALS ; PHOTOCATALYSIS ; PRETREATMENT ; PATHWAY
语种: 英语
WOS记录号: WOS:000237825000040
ISSN号: 0304-3894
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.ihb.ac.cn/handle/152342/8960
Appears in Collections:中科院水生所知识产出(2009年前)_期刊论文

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作者单位: 1.Wuhan Univ, Sch Resources & Environm Sci, Wuhan 430079, Peoples R China
2.Chinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Peoples R China

Recommended Citation:
Zhang, X; Chen, PY; Wu, F; Deng, NS; Liu, JT; Fang, T.Degradation of 17 alpha-ethinylestradiol in aqueous solution by ozonation,JOURNAL OF HAZARDOUS MATERIALS,2006,133(1-3):291-298
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