水中Parabens的二氧化钛光催化降解研究
发布时间：2021-01-13 03:14
近年来,国外已经开始关注药品和个人护理用品（PPCPs）对环境的污染,但在我国还没有引起广泛重视。国外的研究表明,合成麝香物质、显影剂、抗生素、雌激素、消炎止痛药、杀菌消毒剂等与人类生活密切相关的药品和个人护理用品在环境中普遍存在,但是其质量浓度通常非常低,多数情况下在ng L-1-μg L-1水平。粪便施肥和污水排放是PPCPs进入环境的主要途径。目前关于PPCPs的研究主要集中在分析方法以及环境污染水平的调查,有关PPCPs在环境中的迁移转化规律、生态与健康风险以及PPCPs污染控制技术等方面的研究有待加强。Parabens一组防腐剂,其广泛应用于化妆品,食品和医药产品等,属于PPCPs的一种。常用的包括methyl paraben, ethyl paraben, propyl paraben, butyl paraben和benzyl paraben。这些化合物具有广谱抗菌活性。然而,许多制造商正在减少使用parabens,因为越来越多的证据表明,parabens具有雌激素活性。研究人员报告说,parabens在乳腺癌组织中和癌变皮肤中被检测到,这使得制造行业开始锐减parabe...
【文章来源】：武汉大学湖北省 211工程院校 985工程院校 教育部直属院校
【文章页数】：221 页
【学位级别】：博士
【文章目录】：
摘要
ABSTRACT
ACKNOWLEDGEMENTS
Chapter 1 Bibliography Study
1.1 Aqueous Environmental Pollution
1.2 Advanced Oxidation Processes （AOPs）
1.3 Semiconductor Photocatalysis
2） Propriety"> 1.4 Titanium Dioxide （TiO2） Propriety
2 Photocatalysis"> 1.5 TiO2 Photocatalysis
1.6 Pharmaceuticals and Personal Care Products （PPCPs）
1.7 Parabens
Reference
2: Multivariable experimental design and mechanism">Chapter 2 Photocatalytic degradation of methyl paraben by TiO2: Multivariable experimental design and mechanism
2.1 Introduction
2.2 Materials and methods
2.2.1 Materials and reagents
2.2.2 Photoreactor and light source
2.2.3 Experimental procedure
2.2.4 Analytical procedures
2.2.4.1 High performance liquid chromatography-diode array detector
2.2.4.2 Solid-phase extraction
2.2.4.3 Gas chromatography-mass spectrometry
2.2.4.4 Total organic carbon analysis
2.2.4.5. Experimental design data analysis
2.3 Results and discussion
2.3.1 Preliminary experiments
2.3.2. Degradation kinetics
2.3.3 Experimental design
2.3.3.1 Choosing factors and response
2.3.3.2 Central composite design
2.3.3.3 Standardized Pareto chart
2.3.4 Main Effect Plots
2.3.4.1 pH Value
2.3.4.2 Light Flux
2.3.4.3 Oxygen Concentration
2 loading"> 2.3.4.4. TiO2 loading
2.3.5 Contour Diagrams and Optimal Condition
2.3.6 Model Validation and Confirmation
2.3.7 Photocatalysis Intermediates and Pathway
2.3.8 Mineralization
2.4 Conclusions
Acknowledgements
References
2 Photocatalysis">Chapter 3 Degradation of Ethyl paraben in Aqueous Solution by TiO2 Photocatalysis
3.1 Introduction
3.2 Materials and Methods
3.2.1 Materials and Reagents
3.2.2 Photo Reactor and Light Source
3.2.3 Experimental Procedure
3.2.4 Analytical Procedures
3.2.4.1 High Performance Liquid Chromatography-Diode Array Detector
3.2.4.2 Total Organic Carbon Analysis
3.3 Results and Discussion
3.3.1 Preliminary Experiments
3.3.2 Degradation Kinetics
3.3.3 Effects of Parameters
3.3.3.1 Initial pH Values
2 Dosage"> 3.3.3.2 TiO2 Dosage
3.3.3.3 Dissolved Oxygen Concentration
3.3.3.4 Initial Ethyl Paraben Concentration
3.3.3.5 Light Intensity
3.4 Mineralization
3.5 Conclusion
References
2 Photocatalysis">Chapter 4 Degradation of Propyl Paraben in Aqueous Solution by T TiO2 Photocatalysis
4.1 Introduction
4.2 Materials and Methods
4.2.1 Materials and Reagents
4.2.2 Photo Reactor and Light Source
4.2.3 Experimental Procedure
4.2.4 Analytical Procedures
4.2.4.1 High Performance Liquid Chromatography-Diode Array Detector
4.2.4.2 Solid-Phase Extraction
4.2.4.3 Gas Chromatography-Mass Spectrometry
4.2.4.4 Total Organic Carbon Analysis
4.3 Results and Discussion
4.3.1 Preliminary Experiments
4.3.2 Degradation Kinetics
4.3.3 Effects of Parameters
4.3.3.1 Initial pH Values
2 Dosage"> 4.3.3.2 TiO2 Dosage
4.3.3.3 Dissolved Oxygen Concentration
4.3.3.4 Initial Propyl Paraben Concentration
4.3.3.5 Light Intensity
4.4 Intermediates and Products of Photocatalysis
4.5 Mineralization
4.6 Conclusion
References
2 Photocatalysis">Chapter 5 Degradation of Butyl paraben in Aqueous Solution by TiO2 Photocatalysis
5.1 Introduction
5.2 Materials and Methods
5.2.1 Materials and Reagents
5.2.2 Photo Reactor and Light Source
5.2.3 Experimental Procedure
5.2.4 Analytical Procedures
5.2.4.1 High Performance Liquid Chromatography-Diode Array Detector
5.2.4.2 Total Organic Carbon Analysis
5.3 Results and Discussion
5.3.1 Preliminary Experiments
5.3.2 Degradation Kinetics
5.3.3 Effects of Parameters
5.3.3.1 Initial pH Values
2 Dosage"> 5.3.3.2 TiO2 Dosage
5.3.3.3 Dissolved Oxygen Concentration
5.3.3.4 Initial Butyl Paraben Concentration
5.3.3.5 Light Intensity
5.4 Mineralization
5.5 Conclusion
References
Chapter 6 Heterogeneous Photocatalysis of Benzyl paraben by Titanium Dioxide under UV Irradiation
6.1 Introduction
6.2 Materials and Methods
6.2.1 Materials and Reagents
6.2.2 Photo Reactor and Light Source
6.2.3 Experimental Procedure
6.2.4 Analytical Procedures
6.2.4.1 High Performance Liquid Chromatography-Diode Array Detector
6.2.4.2 Solid-Phase Extraction
6.2.4.3 Gas Chromatography-Mass Spectrometry
6.2.4.4 Total Organic Carbon Analysis
6.3 Results and Discussion
6.3.1 Preliminary Experiments
6.3.2 Degradation Kinetics
6.3.3 Effects of Parameters
6.3.3.1 Initial pH Values
2 Dosage"> 6.3.3.2 TiO2 Dosage
6.3.3.3 Dissolved Oxygen Concentration
6.3.3.4 Initial Benzyl Paraben Concentration
6.3.3.5 Light Intensity
6.4 Intermediates and Products of Photocatalysis
6.5 Mineralization
6.6 Conclusion
References
Chapter 7 General Conclusion
List of Figures
List of Tables
Paper Published
本文编号：2974095
【文章来源】：武汉大学湖北省 211工程院校 985工程院校 教育部直属院校
【文章页数】：221 页
【学位级别】：博士
【文章目录】：
摘要
ABSTRACT
ACKNOWLEDGEMENTS
Chapter 1 Bibliography Study
1.1 Aqueous Environmental Pollution
1.2 Advanced Oxidation Processes （AOPs）
1.3 Semiconductor Photocatalysis
2） Propriety"> 1.4 Titanium Dioxide （TiO2） Propriety
2 Photocatalysis"> 1.5 TiO2 Photocatalysis
1.6 Pharmaceuticals and Personal Care Products （PPCPs）
1.7 Parabens
Reference
2: Multivariable experimental design and mechanism">Chapter 2 Photocatalytic degradation of methyl paraben by TiO2: Multivariable experimental design and mechanism
2.1 Introduction
2.2 Materials and methods
2.2.1 Materials and reagents
2.2.2 Photoreactor and light source
2.2.3 Experimental procedure
2.2.4 Analytical procedures
2.2.4.1 High performance liquid chromatography-diode array detector
2.2.4.2 Solid-phase extraction
2.2.4.3 Gas chromatography-mass spectrometry
2.2.4.4 Total organic carbon analysis
2.2.4.5. Experimental design data analysis
2.3 Results and discussion
2.3.1 Preliminary experiments
2.3.2. Degradation kinetics
2.3.3 Experimental design
2.3.3.1 Choosing factors and response
2.3.3.2 Central composite design
2.3.3.3 Standardized Pareto chart
2.3.4 Main Effect Plots
2.3.4.1 pH Value
2.3.4.2 Light Flux
2.3.4.3 Oxygen Concentration
2 loading"> 2.3.4.4. TiO2 loading
2.3.5 Contour Diagrams and Optimal Condition
2.3.6 Model Validation and Confirmation
2.3.7 Photocatalysis Intermediates and Pathway
2.3.8 Mineralization
2.4 Conclusions
Acknowledgements
References
2 Photocatalysis">Chapter 3 Degradation of Ethyl paraben in Aqueous Solution by TiO2 Photocatalysis
3.1 Introduction
3.2 Materials and Methods
3.2.1 Materials and Reagents
3.2.2 Photo Reactor and Light Source
3.2.3 Experimental Procedure
3.2.4 Analytical Procedures
3.2.4.1 High Performance Liquid Chromatography-Diode Array Detector
3.2.4.2 Total Organic Carbon Analysis
3.3 Results and Discussion
3.3.1 Preliminary Experiments
3.3.2 Degradation Kinetics
3.3.3 Effects of Parameters
3.3.3.1 Initial pH Values
2 Dosage"> 3.3.3.2 TiO2 Dosage
3.3.3.3 Dissolved Oxygen Concentration
3.3.3.4 Initial Ethyl Paraben Concentration
3.3.3.5 Light Intensity
3.4 Mineralization
3.5 Conclusion
References
2 Photocatalysis">Chapter 4 Degradation of Propyl Paraben in Aqueous Solution by T TiO2 Photocatalysis
4.1 Introduction
4.2 Materials and Methods
4.2.1 Materials and Reagents
4.2.2 Photo Reactor and Light Source
4.2.3 Experimental Procedure
4.2.4 Analytical Procedures
4.2.4.1 High Performance Liquid Chromatography-Diode Array Detector
4.2.4.2 Solid-Phase Extraction
4.2.4.3 Gas Chromatography-Mass Spectrometry
4.2.4.4 Total Organic Carbon Analysis
4.3 Results and Discussion
4.3.1 Preliminary Experiments
4.3.2 Degradation Kinetics
4.3.3 Effects of Parameters
4.3.3.1 Initial pH Values
2 Dosage"> 4.3.3.2 TiO2 Dosage
4.3.3.3 Dissolved Oxygen Concentration
4.3.3.4 Initial Propyl Paraben Concentration
4.3.3.5 Light Intensity
4.4 Intermediates and Products of Photocatalysis
4.5 Mineralization
4.6 Conclusion
References
2 Photocatalysis">Chapter 5 Degradation of Butyl paraben in Aqueous Solution by TiO2 Photocatalysis
5.1 Introduction
5.2 Materials and Methods
5.2.1 Materials and Reagents
5.2.2 Photo Reactor and Light Source
5.2.3 Experimental Procedure
5.2.4 Analytical Procedures
5.2.4.1 High Performance Liquid Chromatography-Diode Array Detector
5.2.4.2 Total Organic Carbon Analysis
5.3 Results and Discussion
5.3.1 Preliminary Experiments
5.3.2 Degradation Kinetics
5.3.3 Effects of Parameters
5.3.3.1 Initial pH Values
2 Dosage"> 5.3.3.2 TiO2 Dosage
5.3.3.3 Dissolved Oxygen Concentration
5.3.3.4 Initial Butyl Paraben Concentration
5.3.3.5 Light Intensity
5.4 Mineralization
5.5 Conclusion
References
Chapter 6 Heterogeneous Photocatalysis of Benzyl paraben by Titanium Dioxide under UV Irradiation
6.1 Introduction
6.2 Materials and Methods
6.2.1 Materials and Reagents
6.2.2 Photo Reactor and Light Source
6.2.3 Experimental Procedure
6.2.4 Analytical Procedures
6.2.4.1 High Performance Liquid Chromatography-Diode Array Detector
6.2.4.2 Solid-Phase Extraction
6.2.4.3 Gas Chromatography-Mass Spectrometry
6.2.4.4 Total Organic Carbon Analysis
6.3 Results and Discussion
6.3.1 Preliminary Experiments
6.3.2 Degradation Kinetics
6.3.3 Effects of Parameters
6.3.3.1 Initial pH Values
2 Dosage"> 6.3.3.2 TiO2 Dosage
6.3.3.3 Dissolved Oxygen Concentration
6.3.3.4 Initial Benzyl Paraben Concentration
6.3.3.5 Light Intensity
6.4 Intermediates and Products of Photocatalysis
6.5 Mineralization
6.6 Conclusion
References
Chapter 7 General Conclusion
List of Figures
List of Tables
Paper Published
本文编号：2974095
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