冯雅萌^1,2,,
田秉晖¹,
夏佰钦^1,3,
崔景科^1,4,
杨敏^1,2
1.中国科学院生态环境研究中心，环境水质学国家重点实验室，北京 100085
2.中国科学院大学，北京 100049
3.天津城建大学环境与市政工程学院，天津 300384
4.兰州交通大学环境与市政工程学院，兰州 730070
基金项目: 天津市科技计划项目（16YFXTSF00390）
清华大学环境模拟与污染控制国家重点联合实验室专项基金（16L02ESPC）
国家科技重大专项（2012ZX07203-003-R05）

Characterization of phenol ionization state in aqueous solution and transfer feature in electrodialysis

FENG Yameng^1,2,,
TIAN Binghui¹,
XIA Baiqin^1,3,
CUI Jingke^1,4,
YANG Min^1,2
1.State Key Laboratory of Environmental Aquatic Chemistry，Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
2.University of Chinese Academy of Sciences, Beijing 100049, China
3.School of Environmental and Municipal Engineering,Tianjin Chengjian University, Tianjin 300384, China
4.School of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China

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摘要:建立了紫外全波长扫描水溶液中苯酚电离形态的表征与定量分析方法，在此基础上，阐明了不同电离形态苯酚在电渗析过程中的迁移特征。结果表明：离子态、分子态和混合态（离子态和分子态的混合物）苯酚紫外全波长扫描在220～260 nm特征区间存在不同形状的特征峰，其浓度分别与特征波长258、236和236 nm处的吸光度有显著的线性定量关系；在电渗析过程中，离子态苯酚迁移特征为电渗迁移，分子态苯酚与酸协同迁移，混合态符合电离平衡控制迁移；离子态、分子态、混合态苯酚的迁移率分别为42%、4%和13%，在电渗析水处理过程中，有机污染物分子态和混合态的迁移也是重要的研究内容。
关键词: 电渗析/
水处理/
有机物电离形态/
紫外全波长扫描/
苯酚

Abstract:A method for the characterization and quantitative analysis of different ionization forms of phenols in aqueous solution using ultraviolet (UV) full-wavelength scanning was established. By taking advantage of this method, the migration characteristics of different ionization forms of phenols during electrodialysis were elucidated. The results showed that the patterns of characteristic peaks of the dissociated, non-dissociated, and mixed state (mixture of dissociated and non-dissociated) phenols were different in a wavelength range from 220 to 260 nm. The concentrations of the dissociated, non-dissociated, and mixed state phenols were positively linear to their corresponding absorbance at 258, 236, and 236 nm, respectively. The migration characteristics of the dissociated, non-dissociated, and mixed state phenols in the electrodialysis process were accord with electro-migration, synergistic-migration with acid, and ionization equilibrium controlling -migration, respectively. The mobility ratios of the dissociated, non-dissociated, and mixed state phenols in the electrodialysis process were 42%, 4% and 13%, respectively. In a word, the migrations of non-dissociated and mixed state of organic pollutants are also an important research topic in the electrodialysis process.
Key words:electrodialysis/
water treatment/
organics ionization state/
ultraviolet full-wavelength scanning/
phenol.

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水溶液中苯酚电离形态表征及电渗析过程迁移特征

冯雅萌^1,2,,
田秉晖¹,
夏佰钦^1,3,
崔景科^1,4,
杨敏^1,2
1.中国科学院生态环境研究中心，环境水质学国家重点实验室，北京 100085
2.中国科学院大学，北京 100049
3.天津城建大学环境与市政工程学院，天津 300384
4.兰州交通大学环境与市政工程学院，兰州 730070
基金项目: 天津市科技计划项目（16YFXTSF00390） 清华大学环境模拟与污染控制国家重点联合实验室专项基金（16L02ESPC） 国家科技重大专项（2012ZX07203-003-R05）
关键词: 电渗析/
水处理/
有机物电离形态/
紫外全波长扫描/
苯酚
摘要:建立了紫外全波长扫描水溶液中苯酚电离形态的表征与定量分析方法，在此基础上，阐明了不同电离形态苯酚在电渗析过程中的迁移特征。结果表明：离子态、分子态和混合态（离子态和分子态的混合物）苯酚紫外全波长扫描在220～260 nm特征区间存在不同形状的特征峰，其浓度分别与特征波长258、236和236 nm处的吸光度有显著的线性定量关系；在电渗析过程中，离子态苯酚迁移特征为电渗迁移，分子态苯酚与酸协同迁移，混合态符合电离平衡控制迁移；离子态、分子态、混合态苯酚的迁移率分别为42%、4%和13%，在电渗析水处理过程中，有机污染物分子态和混合态的迁移也是重要的研究内容。

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