生物炭—氧化石墨烯复合材料的制备及其对水中污染物的去除性能研究
发布时间：2021-11-02 21:50
生物炭和氧化石墨烯是新兴的碳基材料,由于其结构中具有多级纳米级几何构型,生物炭和氧化石墨烯在环境应用中发挥着重要作用。目前,生物炭和氧化石墨烯得到了许多的关注,并被大量用于吸附剂和膜材料的构建。然而,关于生物炭和氧化石墨烯的研究大多集中在材料合成,改性和与其他功能材料复合等方面,如何保持吸附剂和膜结构的稳定,从而既高效又安全地用于环境修复仍具有很大的挑战。目前,制约生物炭和氧化石墨烯环境应用的因素主要有以下几点:（1）生物炭-氧化石墨烯复合材料对有机污染物的吸附构效关系仍不清楚;（2）生物炭大多以固体颗粒的形式直接进行应用,回收困难且易释放到环境中;（3）氧化石墨烯膜材料对污染物选择性差,可循环性不佳;（4）氧化石墨烯膜材料在水中易于崩解,稳定性低。针对以上科学问题,本研究开发了几种生物炭和氧化石墨烯基复合材料,以吸附剂和膜材料的形式实现了水中污染物的安全高效去除。首先,针对生物炭-石墨烯复合材料对有机污染物吸附构效关系不明确的问题,合成了生物炭-石墨烯复合材料,研究了生物炭-氧化石墨烯（BG）复合材料对邻苯二甲酸酯（PAEs）的吸附性能和构效关系;第二,针对生物炭颗粒难回收的问题,构...
【文章来源】：浙江大学浙江省 211工程院校 985工程院校 教育部直属院校
【文章页数】：202 页
【学位级别】：博士
【文章目录】：
Acknowledgement
Abstract
摘要
Abbreviations
Chapter 1 Carbon Based Materials and Environment
1.1. Introduction
1.2. Carbon based materials for environmental pollution control
1.2.1. Sustainable carbon based materials
1.2.2. Role of carbon based materials in water treatment
1.3. Carbon based materials
1.3.1. Biochar
1.3.2. Graphene oxide
1.4. Water treatment by adsorption and membrane filtration
1.4.1. Water treatment by adsorption
1.4.2. Water purification by membrane filtration
1.5. Vision for carbon based materials application for water treatment
1.5.1. Carbon based materials for water treatment and reuse
1.5.2. Research and development activities
1.5.3. Potential risks to human and ecosystem health
1.6. Research opportunities, challenges, and problems
1.6.1. Problem statement and challenges
1.6.2. Scope of thesis
1.6.3. Organization of thesis
Chapter 2 Structural Characteristics of Biochar-Graphene composites and Their Adsorption Performance for Phthalic Acid Esters
2.1. Introduction
2.2. Materials and methods
2.2.1. Materials
2.2.2. Synthesis of GO
2.2.3. Preparation of biochar and biochar-graphene composites
2.2.4. Characterization of biochars and BG-composite biochars
2.2.5. Adsorption kinetics and isotherms
2.2.6. Data analysis
2.3. Results and discussion
2.3.1. Structural characteristics of biochars and BG composites
2.3.2. Adsorption kinetics of biochars and BG composites
2.3.3. Adsorption isotherms of PAEs on biochars
2.3.4. Adsorption mechanisms
2.4. Summary
Chapter 3 Biochar Composite Membrane for High Performance Pollutant Management-Fabrication, Structural Characteristics, and Synergistic Mechanisms
3.1. Introduction
3.2. Materials and methods
3.2.1. Materials
3.2.2. Preparation of biochar-PVdF membranes
3.2.3. Characterization of biochars and membranes
3.2.4. Static and dynamic adsorption of RB
3.2.5. Bacteria filtration tests
3.2.6. Regeneration of membranes
3.2.7. Data analysis
3.3. Results and discussion
3.3.1. Fabrication and structure of biochar composite membranes
3.3.2. Mechanical properties of biochar composite membranes
3.3.3. Surface composition and properties of biochar composite membranes
3.3.4. Pollutant removal via membrane adsorption
3.3.5. Pollutant removal via membrane sieving
3.3.6. Synergistic effects of biochars and PVdF in membrane for high performance pollutant management
3.4. Summary
Chapter 4 Porous PVdF/GO Nanofibrous Membranes for Selective Separation and Recycling of Charged Organic Dyes from Water
4.1. Introduction
4.2. Materials and methods
4.2.1. Materials
4.2.2. Preparation of PVdF-GO NFMs
4.2.3. Characterization of NFMs
4.2.4. Adsorption kinetics and filtration
4.2.5. Data analysis
4.3. Results and discussion
4.3.1. Morphology and structural of NFMs
4.3.2. Mechanical properties of NFMs
4.3.3. Quantitative analysis of porous structure
4.3.4. Surface composition and properties of NFMs
4.3.5. Adsorption kinetics of NFMs
4.3.6. Molecular filtration performance
4.3.7. Regeneration of NFMs
4.4. Summary
Chapter 5 Scalable Graphene Oxide Membranes with Tunable Water Channels and Stability for Ions Rejections
5.1. Introduction
5.2. Materials and methods
5.2.1. Materials
5.2.2. Preparation of GOMs
5.2.3. Characterization of GOMs
5.2.4. Stability tests
5.2.5. Ion filtration
5.3. Results and discussion
5.3.1. Structural morphology of GOMs
5.3.2. Surface chemistry and properties of membranes
5.3.3. Stability of GOMs
5.3.4. Rejection of ions
5.4. Summary
Chapter 6 Conclusions and Future Recommendations
6.1. Research summary
6.2. Main contribution
6.3. Expectations
6.4. Future work and recommendations
6.5. Closing
References
Publications
本文编号：3472435
【文章来源】：浙江大学浙江省 211工程院校 985工程院校 教育部直属院校
【文章页数】：202 页
【学位级别】：博士
【文章目录】：
Acknowledgement
Abstract
摘要
Abbreviations
Chapter 1 Carbon Based Materials and Environment
1.1. Introduction
1.2. Carbon based materials for environmental pollution control
1.2.1. Sustainable carbon based materials
1.2.2. Role of carbon based materials in water treatment
1.3. Carbon based materials
1.3.1. Biochar
1.3.2. Graphene oxide
1.4. Water treatment by adsorption and membrane filtration
1.4.1. Water treatment by adsorption
1.4.2. Water purification by membrane filtration
1.5. Vision for carbon based materials application for water treatment
1.5.1. Carbon based materials for water treatment and reuse
1.5.2. Research and development activities
1.5.3. Potential risks to human and ecosystem health
1.6. Research opportunities, challenges, and problems
1.6.1. Problem statement and challenges
1.6.2. Scope of thesis
1.6.3. Organization of thesis
Chapter 2 Structural Characteristics of Biochar-Graphene composites and Their Adsorption Performance for Phthalic Acid Esters
2.1. Introduction
2.2. Materials and methods
2.2.1. Materials
2.2.2. Synthesis of GO
2.2.3. Preparation of biochar and biochar-graphene composites
2.2.4. Characterization of biochars and BG-composite biochars
2.2.5. Adsorption kinetics and isotherms
2.2.6. Data analysis
2.3. Results and discussion
2.3.1. Structural characteristics of biochars and BG composites
2.3.2. Adsorption kinetics of biochars and BG composites
2.3.3. Adsorption isotherms of PAEs on biochars
2.3.4. Adsorption mechanisms
2.4. Summary
Chapter 3 Biochar Composite Membrane for High Performance Pollutant Management-Fabrication, Structural Characteristics, and Synergistic Mechanisms
3.1. Introduction
3.2. Materials and methods
3.2.1. Materials
3.2.2. Preparation of biochar-PVdF membranes
3.2.3. Characterization of biochars and membranes
3.2.4. Static and dynamic adsorption of RB
3.2.5. Bacteria filtration tests
3.2.6. Regeneration of membranes
3.2.7. Data analysis
3.3. Results and discussion
3.3.1. Fabrication and structure of biochar composite membranes
3.3.2. Mechanical properties of biochar composite membranes
3.3.3. Surface composition and properties of biochar composite membranes
3.3.4. Pollutant removal via membrane adsorption
3.3.5. Pollutant removal via membrane sieving
3.3.6. Synergistic effects of biochars and PVdF in membrane for high performance pollutant management
3.4. Summary
Chapter 4 Porous PVdF/GO Nanofibrous Membranes for Selective Separation and Recycling of Charged Organic Dyes from Water
4.1. Introduction
4.2. Materials and methods
4.2.1. Materials
4.2.2. Preparation of PVdF-GO NFMs
4.2.3. Characterization of NFMs
4.2.4. Adsorption kinetics and filtration
4.2.5. Data analysis
4.3. Results and discussion
4.3.1. Morphology and structural of NFMs
4.3.2. Mechanical properties of NFMs
4.3.3. Quantitative analysis of porous structure
4.3.4. Surface composition and properties of NFMs
4.3.5. Adsorption kinetics of NFMs
4.3.6. Molecular filtration performance
4.3.7. Regeneration of NFMs
4.4. Summary
Chapter 5 Scalable Graphene Oxide Membranes with Tunable Water Channels and Stability for Ions Rejections
5.1. Introduction
5.2. Materials and methods
5.2.1. Materials
5.2.2. Preparation of GOMs
5.2.3. Characterization of GOMs
5.2.4. Stability tests
5.2.5. Ion filtration
5.3. Results and discussion
5.3.1. Structural morphology of GOMs
5.3.2. Surface chemistry and properties of membranes
5.3.3. Stability of GOMs
5.3.4. Rejection of ions
5.4. Summary
Chapter 6 Conclusions and Future Recommendations
6.1. Research summary
6.2. Main contribution
6.3. Expectations
6.4. Future work and recommendations
6.5. Closing
References
Publications
本文编号：3472435
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