生物炭和氧化石墨烯是新興的碳基材料,由于其結(jié)構(gòu)中具有多級納米級幾何構(gòu)型,生物炭和氧化石墨烯在環(huán)境應用中發(fā)揮著重要作用。目前,生物炭和氧化石墨烯得到了許多的關(guān)注,并被大量用于吸附劑和膜材料的構(gòu)建。然而,關(guān)于生物炭和氧化石墨烯的研究大多集中在材料合成,改性和與其他功能材料復合等方面,如何保持吸附劑和膜結(jié)構(gòu)的穩(wěn)定,從而既高效又安全地用于環(huán)境修復仍具有很大的挑戰(zhàn)。目前,制約生物炭和氧化石墨烯環(huán)境應用的因素主要有以下幾點:（1）生物炭-氧化石墨烯復合材料對有機污染物的吸附構(gòu)效關(guān)系仍不清楚;（2）生物炭大多以固體顆粒的形式直接進行應用,回收困難且易釋放到環(huán)境中;（3）氧化石墨烯膜材料對污染物選擇性差,可循環(huán)性不佳;（4）氧化石墨烯膜材料在水中易于崩解,穩(wěn)定性低。針對以上科學問題,本研究開發(fā)了幾種生物炭和氧化石墨烯基復合材料,以吸附劑和膜材料的形式實現(xiàn)了水中污染物的安全高效去除。首先,針對生物炭-石墨烯復合材料對有機污染物吸附構(gòu)效關(guān)系不明確的問題,合成了生物炭-石墨烯復合材料,研究了生物炭-氧化石墨烯（BG）復合材料對鄰苯二甲酸酯（PAEs）的吸附性能和構(gòu)效關(guān)系;第二,針對生物炭顆粒難回收的問題,構(gòu)... 

【文章來源】：浙江大學浙江省 211工程院校 985工程院校 教育部直屬院校

【文章頁數(shù)】：202 頁

【學位級別】：博士

【文章目錄】：
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



本文編號：3472435