Biochar Sorption to Carbamazepine and Bisphenol A through Mi

发布时间：2021-12-30 04:14

　　生物炭是由生物质在限氧或缺氧条件下热解而得的一种固态、富炭的材料。由于其在固碳、提高土壤肥力、以及固定污染物方面的能力,生物炭作为一种土壤改良剂受到研究者的广泛关注。然而,以不同制备技术或改性方法制备的生物炭的微孔形成机制,以及微孔、炭组成（非聚合态芳香族炭）在有机污染物吸附中的作用仍然少有关注。因此,本文通过不同制备技术或改性方法,在不同温度下分别制备了生物炭或改性生物炭,研究了它们的理化性质与其热解机制之间的关系,调查了原始生物炭和改性生物炭对环境有机污染物卡马西平（CBZ）和双酚A（BPA）的吸附,并就其相关吸附机制进行了初步讨论。本文的主要结论如下:（1）微波辐射（MW）是一种有效的热解制备技术。本研究比较了MW法和电热裂解（FN）法制备的生物炭的理化性质。在相同的裂解温度下,MW生物炭保留了更多的有机质成分（正如MW生物炭更高的产率和丰富的官能团所证明）。而且由于其具有较丰富的微孔,MW生物炭具有较大的比表面积。总的来说,与FN生物炭相比,MW生物炭对CBZ和BPA具有较强的吸附能力。然而,通过单点吸附系数-比表面积标准化,单位面积上MW生物炭的吸附量比FN生物炭上的吸附量低... 

【文章来源】：昆明理工大学云南省

【文章页数】：132 页

【学位级别】：博士

【文章目录】：
Abstract
摘要
Chapter 1. Introduction
    1.1 Background and significance
    1.2 Objectives of the study
    1.3 Contents of the study
    1.4 The organization of this dissertation
    1.5 The innovation of this thesis
    1.6 Key issues need to be discussed in this study
Chapter 2. Literature review
    2.1 The introduction of biochar
    2.2 The properties of biochars
        2.2.1 Preparation
        2.2.2 Properties
    2.3 Interaction of biochar with contaminants
        2.3.1 Organic contaminants
        2.3.2 Heavy metals
    2.4 Biochar modification
        2.4.1 Physical modification
        2.4.2 Chemical modification
Chapter 3. Physi-chemical and sorption properties of biochars prepared by electrothermal pyrolysis and microwave irradiation
    3.1 Introduction
    3.2 Materials and methods
        3.2.1 Materials
        3.2.2 Biochar preparation
        3.2.3 Characterization of FN and MW biochars
        3.2.4 Sorption experiments
        3.2.5 Data analyses
    3.3 Results and Discussion
        3.3.1 The comparison of physical and chemical properties of biochars produced through MW and FN methods
        3.3.2 Morphology observation of biochars produced through MW and FN methods
        3.3.3 Free radicals detected in biochars produced through MW and FN methods
        3.3.4 Sorption isotherms of CBZ and BPA on MW and FN biochars
        3.3.5 Sorption kinetics of CBZ and BPA
    3.4 Summary
Chapter 4. Phosphoric acid pretreatment enhances the specific surface areas of biochars by generation of micropores
    4.1 Introduction
    4.2 Methods and Materials
        4.2.1 Materials
        4.2.2 Preparation of biochars, biochars-H, and raw materials -H
        4.2.3 Characterization of biochars, biochars-H, and raw materials -H
        4.2.4 Batch sorption experiment
        4.2.5 Data analysis
    4.3 Results and Discussion
        4.3.1 Pore structure development
        4.3.2 Elemental composition analysis
        4.3.4 FTIR analysis of BCPS, BCPS-H, and PS-H
        4.3.5 The total P content of BCPS, BCPS-H, and PS-H before and after washing
        4.3.6 The ash content of BCPS, BCPS-H, and PS-H before and after washing
        4.3.7 Sorption of CBZ and BPA
    4.4 Summary
Chapter 5. The relative importance of different carbon structures to organic contaminant sorption in biochars
    5.1 Introduction
    5.2 Materials and Methods
        5.2.1 Materials
        5.2.2 Preparation and bleaching of biochars
        5.2.3 Characterization of original and bleached biochars
        5.2.4 Batch sorption ecperiment
        5.2.5 Data analysis
    5.3 Results and Discussion
        5.3.1 Thermal stability of biochars
        5.3.2 13C NMR spectra of original and bleached biochars
        5.3.3 Elemental composition and porous structure of biochars
        5.3.4 XPS analysis
        5.3.5 Raman analysis
        5.3.6 FTIR spectra
        5.3.7 Sorption of CBZ and BPA
    5.4 Summary
Chapter 6. Conclusion and prospect
    6.1 Conclusion
    6.2 Prospective
Acknowledgements
References
Appendix A List of publications and prizes
Appendix B List of symbols and abbreviations
Appendix C 中文梗概



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